| version 1.165.2.1, 2008/07/07 12:27:19 |
version 1.165.2.2, 2008/10/19 22:17:28 |
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|
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/* $NetBSD$ */ |
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|
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/*- |
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* Copyright (c) 1997, 1999, 2000, 2002, 2007, 2008 The NetBSD Foundation, Inc. |
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* All rights reserved. |
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* |
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* This code is derived from software contributed to The NetBSD Foundation |
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* by Paul Kranenburg; by Jason R. Thorpe of the Numerical Aerospace |
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* Simulation Facility, NASA Ames Research Center, and by Andrew Doran. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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|
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#include <sys/cdefs.h> |
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__KERNEL_RCSID(0, "$NetBSD$"); |
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|
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#include "opt_ddb.h" |
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#include "opt_pool.h" |
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#include "opt_poollog.h" |
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#include "opt_lockdebug.h" |
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|
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#include <sys/param.h> |
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#include <sys/systm.h> |
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#include <sys/bitops.h> |
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#include <sys/proc.h> |
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#include <sys/errno.h> |
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#include <sys/kernel.h> |
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#include <sys/malloc.h> |
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#include <sys/pool.h> |
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#include <sys/syslog.h> |
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#include <sys/debug.h> |
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#include <sys/lockdebug.h> |
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#include <sys/xcall.h> |
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#include <sys/cpu.h> |
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#include <sys/atomic.h> |
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|
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#include <uvm/uvm.h> |
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|
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/* |
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* Pool resource management utility. |
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* |
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* Memory is allocated in pages which are split into pieces according to |
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* the pool item size. Each page is kept on one of three lists in the |
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* pool structure: `pr_emptypages', `pr_fullpages' and `pr_partpages', |
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* for empty, full and partially-full pages respectively. The individual |
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* pool items are on a linked list headed by `ph_itemlist' in each page |
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* header. The memory for building the page list is either taken from |
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* the allocated pages themselves (for small pool items) or taken from |
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* an internal pool of page headers (`phpool'). |
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*/ |
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|
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/* List of all pools */ |
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TAILQ_HEAD(,pool) pool_head = TAILQ_HEAD_INITIALIZER(pool_head); |
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|
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/* Private pool for page header structures */ |
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#define PHPOOL_MAX 8 |
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static struct pool phpool[PHPOOL_MAX]; |
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#define PHPOOL_FREELIST_NELEM(idx) \ |
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(((idx) == 0) ? 0 : BITMAP_SIZE * (1 << (idx))) |
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|
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#ifdef POOL_SUBPAGE |
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/* Pool of subpages for use by normal pools. */ |
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static struct pool psppool; |
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#endif |
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|
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static SLIST_HEAD(, pool_allocator) pa_deferinitq = |
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SLIST_HEAD_INITIALIZER(pa_deferinitq); |
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|
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static void *pool_page_alloc_meta(struct pool *, int); |
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static void pool_page_free_meta(struct pool *, void *); |
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|
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/* allocator for pool metadata */ |
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struct pool_allocator pool_allocator_meta = { |
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pool_page_alloc_meta, pool_page_free_meta, |
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.pa_backingmapptr = &kmem_map, |
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}; |
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|
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/* # of seconds to retain page after last use */ |
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int pool_inactive_time = 10; |
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|
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/* Next candidate for drainage (see pool_drain()) */ |
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static struct pool *drainpp; |
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|
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/* This lock protects both pool_head and drainpp. */ |
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static kmutex_t pool_head_lock; |
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static kcondvar_t pool_busy; |
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|
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typedef uint32_t pool_item_bitmap_t; |
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#define BITMAP_SIZE (CHAR_BIT * sizeof(pool_item_bitmap_t)) |
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#define BITMAP_MASK (BITMAP_SIZE - 1) |
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|
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struct pool_item_header { |
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/* Page headers */ |
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LIST_ENTRY(pool_item_header) |
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ph_pagelist; /* pool page list */ |
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SPLAY_ENTRY(pool_item_header) |
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ph_node; /* Off-page page headers */ |
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void * ph_page; /* this page's address */ |
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uint32_t ph_time; /* last referenced */ |
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uint16_t ph_nmissing; /* # of chunks in use */ |
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uint16_t ph_off; /* start offset in page */ |
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union { |
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/* !PR_NOTOUCH */ |
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struct { |
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LIST_HEAD(, pool_item) |
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phu_itemlist; /* chunk list for this page */ |
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} phu_normal; |
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/* PR_NOTOUCH */ |
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struct { |
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pool_item_bitmap_t phu_bitmap[1]; |
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} phu_notouch; |
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} ph_u; |
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}; |
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#define ph_itemlist ph_u.phu_normal.phu_itemlist |
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#define ph_bitmap ph_u.phu_notouch.phu_bitmap |
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|
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struct pool_item { |
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#ifdef DIAGNOSTIC |
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u_int pi_magic; |
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#endif |
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#define PI_MAGIC 0xdeaddeadU |
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/* Other entries use only this list entry */ |
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LIST_ENTRY(pool_item) pi_list; |
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}; |
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|
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#define POOL_NEEDS_CATCHUP(pp) \ |
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((pp)->pr_nitems < (pp)->pr_minitems) |
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|
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/* |
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* Pool cache management. |
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* |
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* Pool caches provide a way for constructed objects to be cached by the |
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* pool subsystem. This can lead to performance improvements by avoiding |
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* needless object construction/destruction; it is deferred until absolutely |
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* necessary. |
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* |
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* Caches are grouped into cache groups. Each cache group references up |
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* to PCG_NUMOBJECTS constructed objects. When a cache allocates an |
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* object from the pool, it calls the object's constructor and places it |
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* into a cache group. When a cache group frees an object back to the |
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* pool, it first calls the object's destructor. This allows the object |
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* to persist in constructed form while freed to the cache. |
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* |
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* The pool references each cache, so that when a pool is drained by the |
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* pagedaemon, it can drain each individual cache as well. Each time a |
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* cache is drained, the most idle cache group is freed to the pool in |
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* its entirety. |
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* |
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* Pool caches are layed on top of pools. By layering them, we can avoid |
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* the complexity of cache management for pools which would not benefit |
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* from it. |
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*/ |
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|
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static struct pool pcg_normal_pool; |
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static struct pool pcg_large_pool; |
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static struct pool cache_pool; |
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static struct pool cache_cpu_pool; |
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|
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/* List of all caches. */ |
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TAILQ_HEAD(,pool_cache) pool_cache_head = |
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TAILQ_HEAD_INITIALIZER(pool_cache_head); |
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|
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int pool_cache_disable; /* global disable for caching */ |
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static const pcg_t pcg_dummy; /* zero sized: always empty, yet always full */ |
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|
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static bool pool_cache_put_slow(pool_cache_cpu_t *, int, |
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void *); |
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static bool pool_cache_get_slow(pool_cache_cpu_t *, int, |
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void **, paddr_t *, int); |
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static void pool_cache_cpu_init1(struct cpu_info *, pool_cache_t); |
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static void pool_cache_invalidate_groups(pool_cache_t, pcg_t *); |
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static void pool_cache_xcall(pool_cache_t); |
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|
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static int pool_catchup(struct pool *); |
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static void pool_prime_page(struct pool *, void *, |
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struct pool_item_header *); |
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static void pool_update_curpage(struct pool *); |
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|
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static int pool_grow(struct pool *, int); |
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static void *pool_allocator_alloc(struct pool *, int); |
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static void pool_allocator_free(struct pool *, void *); |
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|
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static void pool_print_pagelist(struct pool *, struct pool_pagelist *, |
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void (*)(const char *, ...)); |
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static void pool_print1(struct pool *, const char *, |
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void (*)(const char *, ...)); |
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|
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static int pool_chk_page(struct pool *, const char *, |
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struct pool_item_header *); |
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|
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/* |
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* Pool log entry. An array of these is allocated in pool_init(). |
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*/ |
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struct pool_log { |
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const char *pl_file; |
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long pl_line; |
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int pl_action; |
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#define PRLOG_GET 1 |
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#define PRLOG_PUT 2 |
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void *pl_addr; |
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}; |
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|
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#ifdef POOL_DIAGNOSTIC |
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/* Number of entries in pool log buffers */ |
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#ifndef POOL_LOGSIZE |
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#define POOL_LOGSIZE 10 |
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#endif |
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|
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int pool_logsize = POOL_LOGSIZE; |
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|
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static inline void |
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pr_log(struct pool *pp, void *v, int action, const char *file, long line) |
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{ |
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int n = pp->pr_curlogentry; |
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struct pool_log *pl; |
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|
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if ((pp->pr_roflags & PR_LOGGING) == 0) |
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return; |
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|
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/* |
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* Fill in the current entry. Wrap around and overwrite |
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* the oldest entry if necessary. |
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*/ |
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pl = &pp->pr_log[n]; |
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pl->pl_file = file; |
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pl->pl_line = line; |
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pl->pl_action = action; |
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pl->pl_addr = v; |
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if (++n >= pp->pr_logsize) |
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n = 0; |
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pp->pr_curlogentry = n; |
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} |
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|
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static void |
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pr_printlog(struct pool *pp, struct pool_item *pi, |
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void (*pr)(const char *, ...)) |
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{ |
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int i = pp->pr_logsize; |
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int n = pp->pr_curlogentry; |
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|
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if ((pp->pr_roflags & PR_LOGGING) == 0) |
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return; |
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|
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/* |
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* Print all entries in this pool's log. |
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*/ |
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while (i-- > 0) { |
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struct pool_log *pl = &pp->pr_log[n]; |
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if (pl->pl_action != 0) { |
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if (pi == NULL || pi == pl->pl_addr) { |
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(*pr)("\tlog entry %d:\n", i); |
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(*pr)("\t\taction = %s, addr = %p\n", |
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pl->pl_action == PRLOG_GET ? "get" : "put", |
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pl->pl_addr); |
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(*pr)("\t\tfile: %s at line %lu\n", |
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pl->pl_file, pl->pl_line); |
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} |
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} |
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if (++n >= pp->pr_logsize) |
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n = 0; |
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} |
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} |
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|
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static inline void |
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pr_enter(struct pool *pp, const char *file, long line) |
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{ |
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|
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if (__predict_false(pp->pr_entered_file != NULL)) { |
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printf("pool %s: reentrancy at file %s line %ld\n", |
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pp->pr_wchan, file, line); |
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printf(" previous entry at file %s line %ld\n", |
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pp->pr_entered_file, pp->pr_entered_line); |
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panic("pr_enter"); |
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} |
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|
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pp->pr_entered_file = file; |
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pp->pr_entered_line = line; |
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} |
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|
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static inline void |
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pr_leave(struct pool *pp) |
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{ |
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|
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if (__predict_false(pp->pr_entered_file == NULL)) { |
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printf("pool %s not entered?\n", pp->pr_wchan); |
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panic("pr_leave"); |
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} |
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|
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pp->pr_entered_file = NULL; |
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pp->pr_entered_line = 0; |
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} |
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|
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static inline void |
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pr_enter_check(struct pool *pp, void (*pr)(const char *, ...)) |
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{ |
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|
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if (pp->pr_entered_file != NULL) |
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(*pr)("\n\tcurrently entered from file %s line %ld\n", |
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pp->pr_entered_file, pp->pr_entered_line); |
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} |
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#else |
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#define pr_log(pp, v, action, file, line) |
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#define pr_printlog(pp, pi, pr) |
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#define pr_enter(pp, file, line) |
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#define pr_leave(pp) |
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#define pr_enter_check(pp, pr) |
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#endif /* POOL_DIAGNOSTIC */ |
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|
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static inline unsigned int |
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pr_item_notouch_index(const struct pool *pp, const struct pool_item_header *ph, |
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const void *v) |
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{ |
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const char *cp = v; |
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unsigned int idx; |
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|
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KASSERT(pp->pr_roflags & PR_NOTOUCH); |
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idx = (cp - (char *)ph->ph_page - ph->ph_off) / pp->pr_size; |
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KASSERT(idx < pp->pr_itemsperpage); |
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return idx; |
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} |
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|
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static inline void |
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pr_item_notouch_put(const struct pool *pp, struct pool_item_header *ph, |
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void *obj) |
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{ |
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unsigned int idx = pr_item_notouch_index(pp, ph, obj); |
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pool_item_bitmap_t *bitmap = ph->ph_bitmap + (idx / BITMAP_SIZE); |
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pool_item_bitmap_t mask = 1 << (idx & BITMAP_MASK); |
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|
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KASSERT((*bitmap & mask) == 0); |
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*bitmap |= mask; |
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} |
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|
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static inline void * |
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pr_item_notouch_get(const struct pool *pp, struct pool_item_header *ph) |
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{ |
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pool_item_bitmap_t *bitmap = ph->ph_bitmap; |
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unsigned int idx; |
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int i; |
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|
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for (i = 0; ; i++) { |
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int bit; |
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|
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KASSERT((i * BITMAP_SIZE) < pp->pr_itemsperpage); |
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bit = ffs32(bitmap[i]); |
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if (bit) { |
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pool_item_bitmap_t mask; |
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|
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bit--; |
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idx = (i * BITMAP_SIZE) + bit; |
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mask = 1 << bit; |
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KASSERT((bitmap[i] & mask) != 0); |
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bitmap[i] &= ~mask; |
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break; |
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} |
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} |
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KASSERT(idx < pp->pr_itemsperpage); |
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return (char *)ph->ph_page + ph->ph_off + idx * pp->pr_size; |
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} |
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|
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static inline void |
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pr_item_notouch_init(const struct pool *pp, struct pool_item_header *ph) |
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{ |
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pool_item_bitmap_t *bitmap = ph->ph_bitmap; |
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const int n = howmany(pp->pr_itemsperpage, BITMAP_SIZE); |
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int i; |
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|
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for (i = 0; i < n; i++) { |
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bitmap[i] = (pool_item_bitmap_t)-1; |
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} |
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} |
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|
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static inline int |
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phtree_compare(struct pool_item_header *a, struct pool_item_header *b) |
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{ |
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|
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/* |
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* we consider pool_item_header with smaller ph_page bigger. |
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* (this unnatural ordering is for the benefit of pr_find_pagehead.) |
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*/ |
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|
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if (a->ph_page < b->ph_page) |
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return (1); |
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else if (a->ph_page > b->ph_page) |
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return (-1); |
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else |
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return (0); |
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} |
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|
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SPLAY_PROTOTYPE(phtree, pool_item_header, ph_node, phtree_compare); |
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SPLAY_GENERATE(phtree, pool_item_header, ph_node, phtree_compare); |
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|
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static inline struct pool_item_header * |
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pr_find_pagehead_noalign(struct pool *pp, void *v) |
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{ |
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struct pool_item_header *ph, tmp; |
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|
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tmp.ph_page = (void *)(uintptr_t)v; |
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ph = SPLAY_FIND(phtree, &pp->pr_phtree, &tmp); |
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if (ph == NULL) { |
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ph = SPLAY_ROOT(&pp->pr_phtree); |
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if (ph != NULL && phtree_compare(&tmp, ph) >= 0) { |
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ph = SPLAY_NEXT(phtree, &pp->pr_phtree, ph); |
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} |
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KASSERT(ph == NULL || phtree_compare(&tmp, ph) < 0); |
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} |
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|
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return ph; |
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} |
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|
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/* |
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* Return the pool page header based on item address. |
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*/ |
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static inline struct pool_item_header * |
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pr_find_pagehead(struct pool *pp, void *v) |
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{ |
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struct pool_item_header *ph, tmp; |
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|
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if ((pp->pr_roflags & PR_NOALIGN) != 0) { |
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ph = pr_find_pagehead_noalign(pp, v); |
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} else { |
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void *page = |
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(void *)((uintptr_t)v & pp->pr_alloc->pa_pagemask); |
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|
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if ((pp->pr_roflags & PR_PHINPAGE) != 0) { |
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ph = (struct pool_item_header *)((char *)page + pp->pr_phoffset); |
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} else { |
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tmp.ph_page = page; |
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ph = SPLAY_FIND(phtree, &pp->pr_phtree, &tmp); |
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} |
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} |
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|
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KASSERT(ph == NULL || ((pp->pr_roflags & PR_PHINPAGE) != 0) || |
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((char *)ph->ph_page <= (char *)v && |
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(char *)v < (char *)ph->ph_page + pp->pr_alloc->pa_pagesz)); |
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return ph; |
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} |
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|
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static void |
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pr_pagelist_free(struct pool *pp, struct pool_pagelist *pq) |
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{ |
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struct pool_item_header *ph; |
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|
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while ((ph = LIST_FIRST(pq)) != NULL) { |
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LIST_REMOVE(ph, ph_pagelist); |
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pool_allocator_free(pp, ph->ph_page); |
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if ((pp->pr_roflags & PR_PHINPAGE) == 0) |
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pool_put(pp->pr_phpool, ph); |
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} |
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} |
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|
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/* |
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* Remove a page from the pool. |
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*/ |
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static inline void |
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pr_rmpage(struct pool *pp, struct pool_item_header *ph, |
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struct pool_pagelist *pq) |
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{ |
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|
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KASSERT(mutex_owned(&pp->pr_lock)); |
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|
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/* |
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* If the page was idle, decrement the idle page count. |
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*/ |
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if (ph->ph_nmissing == 0) { |
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#ifdef DIAGNOSTIC |
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if (pp->pr_nidle == 0) |
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panic("pr_rmpage: nidle inconsistent"); |
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if (pp->pr_nitems < pp->pr_itemsperpage) |
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panic("pr_rmpage: nitems inconsistent"); |
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#endif |
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pp->pr_nidle--; |
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} |
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|
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pp->pr_nitems -= pp->pr_itemsperpage; |
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|
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/* |
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* Unlink the page from the pool and queue it for release. |
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*/ |
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LIST_REMOVE(ph, ph_pagelist); |
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if ((pp->pr_roflags & PR_PHINPAGE) == 0) |
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SPLAY_REMOVE(phtree, &pp->pr_phtree, ph); |
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LIST_INSERT_HEAD(pq, ph, ph_pagelist); |
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|
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pp->pr_npages--; |
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pp->pr_npagefree++; |
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|
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pool_update_curpage(pp); |
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} |
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|
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static bool |
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pa_starved_p(struct pool_allocator *pa) |
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{ |
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|
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if (pa->pa_backingmap != NULL) { |
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return vm_map_starved_p(pa->pa_backingmap); |
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} |
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return false; |
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} |
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|
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static int |
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pool_reclaim_callback(struct callback_entry *ce, void *obj, void *arg) |
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{ |
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struct pool *pp = obj; |
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struct pool_allocator *pa = pp->pr_alloc; |
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|
| |
KASSERT(&pp->pr_reclaimerentry == ce); |
| |
pool_reclaim(pp); |
| |
if (!pa_starved_p(pa)) { |
| |
return CALLBACK_CHAIN_ABORT; |
| |
} |
| |
return CALLBACK_CHAIN_CONTINUE; |
| |
} |
| |
|
| |
static void |
| |
pool_reclaim_register(struct pool *pp) |
| |
{ |
| |
struct vm_map *map = pp->pr_alloc->pa_backingmap; |
| |
int s; |
| |
|
| |
if (map == NULL) { |
| |
return; |
| |
} |
| |
|
| |
s = splvm(); /* not necessary for INTRSAFE maps, but don't care. */ |
| |
callback_register(&vm_map_to_kernel(map)->vmk_reclaim_callback, |
| |
&pp->pr_reclaimerentry, pp, pool_reclaim_callback); |
| |
splx(s); |
| |
} |
| |
|
| |
static void |
| |
pool_reclaim_unregister(struct pool *pp) |
| |
{ |
| |
struct vm_map *map = pp->pr_alloc->pa_backingmap; |
| |
int s; |
| |
|
| |
if (map == NULL) { |
| |
return; |
| |
} |
| |
|
| |
s = splvm(); /* not necessary for INTRSAFE maps, but don't care. */ |
| |
callback_unregister(&vm_map_to_kernel(map)->vmk_reclaim_callback, |
| |
&pp->pr_reclaimerentry); |
| |
splx(s); |
| |
} |
| |
|
| |
static void |
| |
pa_reclaim_register(struct pool_allocator *pa) |
| |
{ |
| |
struct vm_map *map = *pa->pa_backingmapptr; |
| |
struct pool *pp; |
| |
|
| |
KASSERT(pa->pa_backingmap == NULL); |
| |
if (map == NULL) { |
| |
SLIST_INSERT_HEAD(&pa_deferinitq, pa, pa_q); |
| |
return; |
| |
} |
| |
pa->pa_backingmap = map; |
| |
TAILQ_FOREACH(pp, &pa->pa_list, pr_alloc_list) { |
| |
pool_reclaim_register(pp); |
| |
} |
| |
} |
| |
|
| |
/* |
| |
* Initialize all the pools listed in the "pools" link set. |
| |
*/ |
| |
void |
| |
pool_subsystem_init(void) |
| |
{ |
| |
struct pool_allocator *pa; |
| |
__link_set_decl(pools, struct link_pool_init); |
| |
struct link_pool_init * const *pi; |
| |
|
| |
mutex_init(&pool_head_lock, MUTEX_DEFAULT, IPL_NONE); |
| |
cv_init(&pool_busy, "poolbusy"); |
| |
|
| |
__link_set_foreach(pi, pools) |
| |
pool_init((*pi)->pp, (*pi)->size, (*pi)->align, |
| |
(*pi)->align_offset, (*pi)->flags, (*pi)->wchan, |
| |
(*pi)->palloc, (*pi)->ipl); |
| |
|
| |
while ((pa = SLIST_FIRST(&pa_deferinitq)) != NULL) { |
| |
KASSERT(pa->pa_backingmapptr != NULL); |
| |
KASSERT(*pa->pa_backingmapptr != NULL); |
| |
SLIST_REMOVE_HEAD(&pa_deferinitq, pa_q); |
| |
pa_reclaim_register(pa); |
| |
} |
| |
|
| |
pool_init(&cache_pool, sizeof(struct pool_cache), coherency_unit, |
| |
0, 0, "pcache", &pool_allocator_nointr, IPL_NONE); |
| |
|
| |
pool_init(&cache_cpu_pool, sizeof(pool_cache_cpu_t), coherency_unit, |
| |
0, 0, "pcachecpu", &pool_allocator_nointr, IPL_NONE); |
| |
} |
| |
|
| |
/* |
| |
* Initialize the given pool resource structure. |
| |
* |
| |
* We export this routine to allow other kernel parts to declare |
| |
* static pools that must be initialized before malloc() is available. |
| |
*/ |
| |
void |
| |
pool_init(struct pool *pp, size_t size, u_int align, u_int ioff, int flags, |
| |
const char *wchan, struct pool_allocator *palloc, int ipl) |
| |
{ |
| |
struct pool *pp1; |
| |
size_t trysize, phsize; |
| |
int off, slack; |
| |
|
| |
#ifdef DEBUG |
| |
/* |
| |
* Check that the pool hasn't already been initialised and |
| |
* added to the list of all pools. |
| |
*/ |
| |
TAILQ_FOREACH(pp1, &pool_head, pr_poollist) { |
| |
if (pp == pp1) |
| |
panic("pool_init: pool %s already initialised", |
| |
wchan); |
| |
} |
| |
#endif |
| |
|
| |
#ifdef POOL_DIAGNOSTIC |
| |
/* |
| |
* Always log if POOL_DIAGNOSTIC is defined. |
| |
*/ |
| |
if (pool_logsize != 0) |
| |
flags |= PR_LOGGING; |
| |
#endif |
| |
|
| |
if (palloc == NULL) |
| |
palloc = &pool_allocator_kmem; |
| |
#ifdef POOL_SUBPAGE |
| |
if (size > palloc->pa_pagesz) { |
| |
if (palloc == &pool_allocator_kmem) |
| |
palloc = &pool_allocator_kmem_fullpage; |
| |
else if (palloc == &pool_allocator_nointr) |
| |
palloc = &pool_allocator_nointr_fullpage; |
| |
} |
| |
#endif /* POOL_SUBPAGE */ |
| |
if ((palloc->pa_flags & PA_INITIALIZED) == 0) { |
| |
if (palloc->pa_pagesz == 0) |
| |
palloc->pa_pagesz = PAGE_SIZE; |
| |
|
| |
TAILQ_INIT(&palloc->pa_list); |
| |
|
| |
mutex_init(&palloc->pa_lock, MUTEX_DEFAULT, IPL_VM); |
| |
palloc->pa_pagemask = ~(palloc->pa_pagesz - 1); |
| |
palloc->pa_pageshift = ffs(palloc->pa_pagesz) - 1; |
| |
|
| |
if (palloc->pa_backingmapptr != NULL) { |
| |
pa_reclaim_register(palloc); |
| |
} |
| |
palloc->pa_flags |= PA_INITIALIZED; |
| |
} |
| |
|
| |
if (align == 0) |
| |
align = ALIGN(1); |
| |
|
| |
if ((flags & PR_NOTOUCH) == 0 && size < sizeof(struct pool_item)) |
| |
size = sizeof(struct pool_item); |
| |
|
| |
size = roundup(size, align); |
| |
#ifdef DIAGNOSTIC |
| |
if (size > palloc->pa_pagesz) |
| |
panic("pool_init: pool item size (%zu) too large", size); |
| |
#endif |
| |
|
| |
/* |
| |
* Initialize the pool structure. |
| |
*/ |
| |
LIST_INIT(&pp->pr_emptypages); |
| |
LIST_INIT(&pp->pr_fullpages); |
| |
LIST_INIT(&pp->pr_partpages); |
| |
pp->pr_cache = NULL; |
| |
pp->pr_curpage = NULL; |
| |
pp->pr_npages = 0; |
| |
pp->pr_minitems = 0; |
| |
pp->pr_minpages = 0; |
| |
pp->pr_maxpages = UINT_MAX; |
| |
pp->pr_roflags = flags; |
| |
pp->pr_flags = 0; |
| |
pp->pr_size = size; |
| |
pp->pr_align = align; |
| |
pp->pr_wchan = wchan; |
| |
pp->pr_alloc = palloc; |
| |
pp->pr_nitems = 0; |
| |
pp->pr_nout = 0; |
| |
pp->pr_hardlimit = UINT_MAX; |
| |
pp->pr_hardlimit_warning = NULL; |
| |
pp->pr_hardlimit_ratecap.tv_sec = 0; |
| |
pp->pr_hardlimit_ratecap.tv_usec = 0; |
| |
pp->pr_hardlimit_warning_last.tv_sec = 0; |
| |
pp->pr_hardlimit_warning_last.tv_usec = 0; |
| |
pp->pr_drain_hook = NULL; |
| |
pp->pr_drain_hook_arg = NULL; |
| |
pp->pr_freecheck = NULL; |
| |
|
| |
/* |
| |
* Decide whether to put the page header off page to avoid |
| |
* wasting too large a part of the page or too big item. |
| |
* Off-page page headers go on a hash table, so we can match |
| |
* a returned item with its header based on the page address. |
| |
* We use 1/16 of the page size and about 8 times of the item |
| |
* size as the threshold (XXX: tune) |
| |
* |
| |
* However, we'll put the header into the page if we can put |
| |
* it without wasting any items. |
| |
* |
| |
* Silently enforce `0 <= ioff < align'. |
| |
*/ |
| |
pp->pr_itemoffset = ioff %= align; |
| |
/* See the comment below about reserved bytes. */ |
| |
trysize = palloc->pa_pagesz - ((align - ioff) % align); |
| |
phsize = ALIGN(sizeof(struct pool_item_header)); |
| |
if ((pp->pr_roflags & (PR_NOTOUCH | PR_NOALIGN)) == 0 && |
| |
(pp->pr_size < MIN(palloc->pa_pagesz / 16, phsize << 3) || |
| |
trysize / pp->pr_size == (trysize - phsize) / pp->pr_size)) { |
| |
/* Use the end of the page for the page header */ |
| |
pp->pr_roflags |= PR_PHINPAGE; |
| |
pp->pr_phoffset = off = palloc->pa_pagesz - phsize; |
| |
} else { |
| |
/* The page header will be taken from our page header pool */ |
| |
pp->pr_phoffset = 0; |
| |
off = palloc->pa_pagesz; |
| |
SPLAY_INIT(&pp->pr_phtree); |
| |
} |
| |
|
| |
/* |
| |
* Alignment is to take place at `ioff' within the item. This means |
| |
* we must reserve up to `align - 1' bytes on the page to allow |
| |
* appropriate positioning of each item. |
| |
*/ |
| |
pp->pr_itemsperpage = (off - ((align - ioff) % align)) / pp->pr_size; |
| |
KASSERT(pp->pr_itemsperpage != 0); |
| |
if ((pp->pr_roflags & PR_NOTOUCH)) { |
| |
int idx; |
| |
|
| |
for (idx = 0; pp->pr_itemsperpage > PHPOOL_FREELIST_NELEM(idx); |
| |
idx++) { |
| |
/* nothing */ |
| |
} |
| |
if (idx >= PHPOOL_MAX) { |
| |
/* |
| |
* if you see this panic, consider to tweak |
| |
* PHPOOL_MAX and PHPOOL_FREELIST_NELEM. |
| |
*/ |
| |
panic("%s: too large itemsperpage(%d) for PR_NOTOUCH", |
| |
pp->pr_wchan, pp->pr_itemsperpage); |
| |
} |
| |
pp->pr_phpool = &phpool[idx]; |
| |
} else if ((pp->pr_roflags & PR_PHINPAGE) == 0) { |
| |
pp->pr_phpool = &phpool[0]; |
| |
} |
| |
#if defined(DIAGNOSTIC) |
| |
else { |
| |
pp->pr_phpool = NULL; |
| |
} |
| |
#endif |
| |
|
| |
/* |
| |
* Use the slack between the chunks and the page header |
| |
* for "cache coloring". |
| |
*/ |
| |
slack = off - pp->pr_itemsperpage * pp->pr_size; |
| |
pp->pr_maxcolor = (slack / align) * align; |
| |
pp->pr_curcolor = 0; |
| |
|
| |
pp->pr_nget = 0; |
| |
pp->pr_nfail = 0; |
| |
pp->pr_nput = 0; |
| |
pp->pr_npagealloc = 0; |
| |
pp->pr_npagefree = 0; |
| |
pp->pr_hiwat = 0; |
| |
pp->pr_nidle = 0; |
| |
pp->pr_refcnt = 0; |
| |
|
| |
#ifdef POOL_DIAGNOSTIC |
| |
if (flags & PR_LOGGING) { |
| |
if (kmem_map == NULL || |
| |
(pp->pr_log = malloc(pool_logsize * sizeof(struct pool_log), |
| |
M_TEMP, M_NOWAIT)) == NULL) |
| |
pp->pr_roflags &= ~PR_LOGGING; |
| |
pp->pr_curlogentry = 0; |
| |
pp->pr_logsize = pool_logsize; |
| |
} |
| |
#endif |
| |
|
| |
pp->pr_entered_file = NULL; |
| |
pp->pr_entered_line = 0; |
| |
|
| |
mutex_init(&pp->pr_lock, MUTEX_DEFAULT, ipl); |
| |
cv_init(&pp->pr_cv, wchan); |
| |
pp->pr_ipl = ipl; |
| |
|
| |
/* |
| |
* Initialize private page header pool and cache magazine pool if we |
| |
* haven't done so yet. |
| |
* XXX LOCKING. |
| |
*/ |
| |
if (phpool[0].pr_size == 0) { |
| |
int idx; |
| |
for (idx = 0; idx < PHPOOL_MAX; idx++) { |
| |
static char phpool_names[PHPOOL_MAX][6+1+6+1]; |
| |
int nelem; |
| |
size_t sz; |
| |
|
| |
nelem = PHPOOL_FREELIST_NELEM(idx); |
| |
snprintf(phpool_names[idx], sizeof(phpool_names[idx]), |
| |
"phpool-%d", nelem); |
| |
sz = sizeof(struct pool_item_header); |
| |
if (nelem) { |
| |
sz = offsetof(struct pool_item_header, |
| |
ph_bitmap[howmany(nelem, BITMAP_SIZE)]); |
| |
} |
| |
pool_init(&phpool[idx], sz, 0, 0, 0, |
| |
phpool_names[idx], &pool_allocator_meta, IPL_VM); |
| |
} |
| |
#ifdef POOL_SUBPAGE |
| |
pool_init(&psppool, POOL_SUBPAGE, POOL_SUBPAGE, 0, |
| |
PR_RECURSIVE, "psppool", &pool_allocator_meta, IPL_VM); |
| |
#endif |
| |
|
| |
size = sizeof(pcg_t) + |
| |
(PCG_NOBJECTS_NORMAL - 1) * sizeof(pcgpair_t); |
| |
pool_init(&pcg_normal_pool, size, coherency_unit, 0, 0, |
| |
"pcgnormal", &pool_allocator_meta, IPL_VM); |
| |
|
| |
size = sizeof(pcg_t) + |
| |
(PCG_NOBJECTS_LARGE - 1) * sizeof(pcgpair_t); |
| |
pool_init(&pcg_large_pool, size, coherency_unit, 0, 0, |
| |
"pcglarge", &pool_allocator_meta, IPL_VM); |
| |
} |
| |
|
| |
/* Insert into the list of all pools. */ |
| |
if (__predict_true(!cold)) |
| |
mutex_enter(&pool_head_lock); |
| |
TAILQ_FOREACH(pp1, &pool_head, pr_poollist) { |
| |
if (strcmp(pp1->pr_wchan, pp->pr_wchan) > 0) |
| |
break; |
| |
} |
| |
if (pp1 == NULL) |
| |
TAILQ_INSERT_TAIL(&pool_head, pp, pr_poollist); |
| |
else |
| |
TAILQ_INSERT_BEFORE(pp1, pp, pr_poollist); |
| |
if (__predict_true(!cold)) |
| |
mutex_exit(&pool_head_lock); |
| |
|
| |
/* Insert this into the list of pools using this allocator. */ |
| |
if (__predict_true(!cold)) |
| |
mutex_enter(&palloc->pa_lock); |
| |
TAILQ_INSERT_TAIL(&palloc->pa_list, pp, pr_alloc_list); |
| |
if (__predict_true(!cold)) |
| |
mutex_exit(&palloc->pa_lock); |
| |
|
| |
pool_reclaim_register(pp); |
| |
} |
| |
|
| |
/* |
| |
* De-commision a pool resource. |
| |
*/ |
| |
void |
| |
pool_destroy(struct pool *pp) |
| |
{ |
| |
struct pool_pagelist pq; |
| |
struct pool_item_header *ph; |
| |
|
| |
/* Remove from global pool list */ |
| |
mutex_enter(&pool_head_lock); |
| |
while (pp->pr_refcnt != 0) |
| |
cv_wait(&pool_busy, &pool_head_lock); |
| |
TAILQ_REMOVE(&pool_head, pp, pr_poollist); |
| |
if (drainpp == pp) |
| |
drainpp = NULL; |
| |
mutex_exit(&pool_head_lock); |
| |
|
| |
/* Remove this pool from its allocator's list of pools. */ |
| |
pool_reclaim_unregister(pp); |
| |
mutex_enter(&pp->pr_alloc->pa_lock); |
| |
TAILQ_REMOVE(&pp->pr_alloc->pa_list, pp, pr_alloc_list); |
| |
mutex_exit(&pp->pr_alloc->pa_lock); |
| |
|
| |
mutex_enter(&pp->pr_lock); |
| |
|
| |
KASSERT(pp->pr_cache == NULL); |
| |
|
| |
#ifdef DIAGNOSTIC |
| |
if (pp->pr_nout != 0) { |
| |
pr_printlog(pp, NULL, printf); |
| |
panic("pool_destroy: pool busy: still out: %u", |
| |
pp->pr_nout); |
| |
} |
| |
#endif |
| |
|
| |
KASSERT(LIST_EMPTY(&pp->pr_fullpages)); |
| |
KASSERT(LIST_EMPTY(&pp->pr_partpages)); |
| |
|
| |
/* Remove all pages */ |
| |
LIST_INIT(&pq); |
| |
while ((ph = LIST_FIRST(&pp->pr_emptypages)) != NULL) |
| |
pr_rmpage(pp, ph, &pq); |
| |
|
| |
mutex_exit(&pp->pr_lock); |
| |
|
| |
pr_pagelist_free(pp, &pq); |
| |
|
| |
#ifdef POOL_DIAGNOSTIC |
| |
if ((pp->pr_roflags & PR_LOGGING) != 0) |
| |
free(pp->pr_log, M_TEMP); |
| |
#endif |
| |
|
| |
cv_destroy(&pp->pr_cv); |
| |
mutex_destroy(&pp->pr_lock); |
| |
} |
| |
|
| |
void |
| |
pool_set_drain_hook(struct pool *pp, void (*fn)(void *, int), void *arg) |
| |
{ |
| |
|
| |
/* XXX no locking -- must be used just after pool_init() */ |
| |
#ifdef DIAGNOSTIC |
| |
if (pp->pr_drain_hook != NULL) |
| |
panic("pool_set_drain_hook(%s): already set", pp->pr_wchan); |
| |
#endif |
| |
pp->pr_drain_hook = fn; |
| |
pp->pr_drain_hook_arg = arg; |
| |
} |
| |
|
| |
static struct pool_item_header * |
| |
pool_alloc_item_header(struct pool *pp, void *storage, int flags) |
| |
{ |
| |
struct pool_item_header *ph; |
| |
|
| |
if ((pp->pr_roflags & PR_PHINPAGE) != 0) |
| |
ph = (struct pool_item_header *) ((char *)storage + pp->pr_phoffset); |
| |
else |
| |
ph = pool_get(pp->pr_phpool, flags); |
| |
|
| |
return (ph); |
| |
} |
| |
|
| |
/* |
| |
* Grab an item from the pool. |
| |
*/ |
| |
void * |
| |
#ifdef POOL_DIAGNOSTIC |
| |
_pool_get(struct pool *pp, int flags, const char *file, long line) |
| |
#else |
| |
pool_get(struct pool *pp, int flags) |
| |
#endif |
| |
{ |
| |
struct pool_item *pi; |
| |
struct pool_item_header *ph; |
| |
void *v; |
| |
|
| |
#ifdef DIAGNOSTIC |
| |
if (__predict_false(pp->pr_itemsperpage == 0)) |
| |
panic("pool_get: pool %p: pr_itemsperpage is zero, " |
| |
"pool not initialized?", pp); |
| |
if (__predict_false(curlwp == NULL && doing_shutdown == 0 && |
| |
(flags & PR_WAITOK) != 0)) |
| |
panic("pool_get: %s: must have NOWAIT", pp->pr_wchan); |
| |
|
| |
#endif /* DIAGNOSTIC */ |
| |
#ifdef LOCKDEBUG |
| |
if (flags & PR_WAITOK) { |
| |
ASSERT_SLEEPABLE(); |
| |
} |
| |
#endif |
| |
|
| |
mutex_enter(&pp->pr_lock); |
| |
pr_enter(pp, file, line); |
| |
|
| |
startover: |
| |
/* |
| |
* Check to see if we've reached the hard limit. If we have, |
| |
* and we can wait, then wait until an item has been returned to |
| |
* the pool. |
| |
*/ |
| |
#ifdef DIAGNOSTIC |
| |
if (__predict_false(pp->pr_nout > pp->pr_hardlimit)) { |
| |
pr_leave(pp); |
| |
mutex_exit(&pp->pr_lock); |
| |
panic("pool_get: %s: crossed hard limit", pp->pr_wchan); |
| |
} |
| |
#endif |
| |
if (__predict_false(pp->pr_nout == pp->pr_hardlimit)) { |
| |
if (pp->pr_drain_hook != NULL) { |
| |
/* |
| |
* Since the drain hook is going to free things |
| |
* back to the pool, unlock, call the hook, re-lock, |
| |
* and check the hardlimit condition again. |
| |
*/ |
| |
pr_leave(pp); |
| |
mutex_exit(&pp->pr_lock); |
| |
(*pp->pr_drain_hook)(pp->pr_drain_hook_arg, flags); |
| |
mutex_enter(&pp->pr_lock); |
| |
pr_enter(pp, file, line); |
| |
if (pp->pr_nout < pp->pr_hardlimit) |
| |
goto startover; |
| |
} |
| |
|
| |
if ((flags & PR_WAITOK) && !(flags & PR_LIMITFAIL)) { |
| |
/* |
| |
* XXX: A warning isn't logged in this case. Should |
| |
* it be? |
| |
*/ |
| |
pp->pr_flags |= PR_WANTED; |
| |
pr_leave(pp); |
| |
cv_wait(&pp->pr_cv, &pp->pr_lock); |
| |
pr_enter(pp, file, line); |
| |
goto startover; |
| |
} |
| |
|
| |
/* |
| |
* Log a message that the hard limit has been hit. |
| |
*/ |
| |
if (pp->pr_hardlimit_warning != NULL && |
| |
ratecheck(&pp->pr_hardlimit_warning_last, |
| |
&pp->pr_hardlimit_ratecap)) |
| |
log(LOG_ERR, "%s\n", pp->pr_hardlimit_warning); |
| |
|
| |
pp->pr_nfail++; |
| |
|
| |
pr_leave(pp); |
| |
mutex_exit(&pp->pr_lock); |
| |
return (NULL); |
| |
} |
| |
|
| |
/* |
| |
* The convention we use is that if `curpage' is not NULL, then |
| |
* it points at a non-empty bucket. In particular, `curpage' |
| |
* never points at a page header which has PR_PHINPAGE set and |
| |
* has no items in its bucket. |
| |
*/ |
| |
if ((ph = pp->pr_curpage) == NULL) { |
| |
int error; |
| |
|
| |
#ifdef DIAGNOSTIC |
| |
if (pp->pr_nitems != 0) { |
| |
mutex_exit(&pp->pr_lock); |
| |
printf("pool_get: %s: curpage NULL, nitems %u\n", |
| |
pp->pr_wchan, pp->pr_nitems); |
| |
panic("pool_get: nitems inconsistent"); |
| |
} |
| |
#endif |
| |
|
| |
/* |
| |
* Call the back-end page allocator for more memory. |
| |
* Release the pool lock, as the back-end page allocator |
| |
* may block. |
| |
*/ |
| |
pr_leave(pp); |
| |
error = pool_grow(pp, flags); |
| |
pr_enter(pp, file, line); |
| |
if (error != 0) { |
| |
/* |
| |
* We were unable to allocate a page or item |
| |
* header, but we released the lock during |
| |
* allocation, so perhaps items were freed |
| |
* back to the pool. Check for this case. |
| |
*/ |
| |
if (pp->pr_curpage != NULL) |
| |
goto startover; |
| |
|
| |
pp->pr_nfail++; |
| |
pr_leave(pp); |
| |
mutex_exit(&pp->pr_lock); |
| |
return (NULL); |
| |
} |
| |
|
| |
/* Start the allocation process over. */ |
| |
goto startover; |
| |
} |
| |
if (pp->pr_roflags & PR_NOTOUCH) { |
| |
#ifdef DIAGNOSTIC |
| |
if (__predict_false(ph->ph_nmissing == pp->pr_itemsperpage)) { |
| |
pr_leave(pp); |
| |
mutex_exit(&pp->pr_lock); |
| |
panic("pool_get: %s: page empty", pp->pr_wchan); |
| |
} |
| |
#endif |
| |
v = pr_item_notouch_get(pp, ph); |
| |
#ifdef POOL_DIAGNOSTIC |
| |
pr_log(pp, v, PRLOG_GET, file, line); |
| |
#endif |
| |
} else { |
| |
v = pi = LIST_FIRST(&ph->ph_itemlist); |
| |
if (__predict_false(v == NULL)) { |
| |
pr_leave(pp); |
| |
mutex_exit(&pp->pr_lock); |
| |
panic("pool_get: %s: page empty", pp->pr_wchan); |
| |
} |
| |
#ifdef DIAGNOSTIC |
| |
if (__predict_false(pp->pr_nitems == 0)) { |
| |
pr_leave(pp); |
| |
mutex_exit(&pp->pr_lock); |
| |
printf("pool_get: %s: items on itemlist, nitems %u\n", |
| |
pp->pr_wchan, pp->pr_nitems); |
| |
panic("pool_get: nitems inconsistent"); |
| |
} |
| |
#endif |
| |
|
| |
#ifdef POOL_DIAGNOSTIC |
| |
pr_log(pp, v, PRLOG_GET, file, line); |
| |
#endif |
| |
|
| |
#ifdef DIAGNOSTIC |
| |
if (__predict_false(pi->pi_magic != PI_MAGIC)) { |
| |
pr_printlog(pp, pi, printf); |
| |
panic("pool_get(%s): free list modified: " |
| |
"magic=%x; page %p; item addr %p\n", |
| |
pp->pr_wchan, pi->pi_magic, ph->ph_page, pi); |
| |
} |
| |
#endif |
| |
|
| |
/* |
| |
* Remove from item list. |
| |
*/ |
| |
LIST_REMOVE(pi, pi_list); |
| |
} |
| |
pp->pr_nitems--; |
| |
pp->pr_nout++; |
| |
if (ph->ph_nmissing == 0) { |
| |
#ifdef DIAGNOSTIC |
| |
if (__predict_false(pp->pr_nidle == 0)) |
| |
panic("pool_get: nidle inconsistent"); |
| |
#endif |
| |
pp->pr_nidle--; |
| |
|
| |
/* |
| |
* This page was previously empty. Move it to the list of |
| |
* partially-full pages. This page is already curpage. |
| |
*/ |
| |
LIST_REMOVE(ph, ph_pagelist); |
| |
LIST_INSERT_HEAD(&pp->pr_partpages, ph, ph_pagelist); |
| |
} |
| |
ph->ph_nmissing++; |
| |
if (ph->ph_nmissing == pp->pr_itemsperpage) { |
| |
#ifdef DIAGNOSTIC |
| |
if (__predict_false((pp->pr_roflags & PR_NOTOUCH) == 0 && |
| |
!LIST_EMPTY(&ph->ph_itemlist))) { |
| |
pr_leave(pp); |
| |
mutex_exit(&pp->pr_lock); |
| |
panic("pool_get: %s: nmissing inconsistent", |
| |
pp->pr_wchan); |
| |
} |
| |
#endif |
| |
/* |
| |
* This page is now full. Move it to the full list |
| |
* and select a new current page. |
| |
*/ |
| |
LIST_REMOVE(ph, ph_pagelist); |
| |
LIST_INSERT_HEAD(&pp->pr_fullpages, ph, ph_pagelist); |
| |
pool_update_curpage(pp); |
| |
} |
| |
|
| |
pp->pr_nget++; |
| |
pr_leave(pp); |
| |
|
| |
/* |
| |
* If we have a low water mark and we are now below that low |
| |
* water mark, add more items to the pool. |
| |
*/ |
| |
if (POOL_NEEDS_CATCHUP(pp) && pool_catchup(pp) != 0) { |
| |
/* |
| |
* XXX: Should we log a warning? Should we set up a timeout |
| |
* to try again in a second or so? The latter could break |
| |
* a caller's assumptions about interrupt protection, etc. |
| |
*/ |
| |
} |
| |
|
| |
mutex_exit(&pp->pr_lock); |
| |
KASSERT((((vaddr_t)v + pp->pr_itemoffset) & (pp->pr_align - 1)) == 0); |
| |
FREECHECK_OUT(&pp->pr_freecheck, v); |
| |
return (v); |
| |
} |
| |
|
| |
/* |
| |
* Internal version of pool_put(). Pool is already locked/entered. |
| |
*/ |
| |
static void |
| |
pool_do_put(struct pool *pp, void *v, struct pool_pagelist *pq) |
| |
{ |
| |
struct pool_item *pi = v; |
| |
struct pool_item_header *ph; |
| |
|
| |
KASSERT(mutex_owned(&pp->pr_lock)); |
| |
FREECHECK_IN(&pp->pr_freecheck, v); |
| |
LOCKDEBUG_MEM_CHECK(v, pp->pr_size); |
| |
|
| |
#ifdef DIAGNOSTIC |
| |
if (__predict_false(pp->pr_nout == 0)) { |
| |
printf("pool %s: putting with none out\n", |
| |
pp->pr_wchan); |
| |
panic("pool_put"); |
| |
} |
| |
#endif |
| |
|
| |
if (__predict_false((ph = pr_find_pagehead(pp, v)) == NULL)) { |
| |
pr_printlog(pp, NULL, printf); |
| |
panic("pool_put: %s: page header missing", pp->pr_wchan); |
| |
} |
| |
|
| |
/* |
| |
* Return to item list. |
| |
*/ |
| |
if (pp->pr_roflags & PR_NOTOUCH) { |
| |
pr_item_notouch_put(pp, ph, v); |
| |
} else { |
| |
#ifdef DIAGNOSTIC |
| |
pi->pi_magic = PI_MAGIC; |
| |
#endif |
| |
#ifdef DEBUG |
| |
{ |
| |
int i, *ip = v; |
| |
|
| |
for (i = 0; i < pp->pr_size / sizeof(int); i++) { |
| |
*ip++ = PI_MAGIC; |
| |
} |
| |
} |
| |
#endif |
| |
|
| |
LIST_INSERT_HEAD(&ph->ph_itemlist, pi, pi_list); |
| |
} |
| |
KDASSERT(ph->ph_nmissing != 0); |
| |
ph->ph_nmissing--; |
| |
pp->pr_nput++; |
| |
pp->pr_nitems++; |
| |
pp->pr_nout--; |
| |
|
| |
/* Cancel "pool empty" condition if it exists */ |
| |
if (pp->pr_curpage == NULL) |
| |
pp->pr_curpage = ph; |
| |
|
| |
if (pp->pr_flags & PR_WANTED) { |
| |
pp->pr_flags &= ~PR_WANTED; |
| |
cv_broadcast(&pp->pr_cv); |
| |
} |
| |
|
| |
/* |
| |
* If this page is now empty, do one of two things: |
| |
* |
| |
* (1) If we have more pages than the page high water mark, |
| |
* free the page back to the system. ONLY CONSIDER |
| |
* FREEING BACK A PAGE IF WE HAVE MORE THAN OUR MINIMUM PAGE |
| |
* CLAIM. |
| |
* |
| |
* (2) Otherwise, move the page to the empty page list. |
| |
* |
| |
* Either way, select a new current page (so we use a partially-full |
| |
* page if one is available). |
| |
*/ |
| |
if (ph->ph_nmissing == 0) { |
| |
pp->pr_nidle++; |
| |
if (pp->pr_npages > pp->pr_minpages && |
| |
pp->pr_npages > pp->pr_maxpages) { |
| |
pr_rmpage(pp, ph, pq); |
| |
} else { |
| |
LIST_REMOVE(ph, ph_pagelist); |
| |
LIST_INSERT_HEAD(&pp->pr_emptypages, ph, ph_pagelist); |
| |
|
| |
/* |
| |
* Update the timestamp on the page. A page must |
| |
* be idle for some period of time before it can |
| |
* be reclaimed by the pagedaemon. This minimizes |
| |
* ping-pong'ing for memory. |
| |
* |
| |
* note for 64-bit time_t: truncating to 32-bit is not |
| |
* a problem for our usage. |
| |
*/ |
| |
ph->ph_time = time_uptime; |
| |
} |
| |
pool_update_curpage(pp); |
| |
} |
| |
|
| |
/* |
| |
* If the page was previously completely full, move it to the |
| |
* partially-full list and make it the current page. The next |
| |
* allocation will get the item from this page, instead of |
| |
* further fragmenting the pool. |
| |
*/ |
| |
else if (ph->ph_nmissing == (pp->pr_itemsperpage - 1)) { |
| |
LIST_REMOVE(ph, ph_pagelist); |
| |
LIST_INSERT_HEAD(&pp->pr_partpages, ph, ph_pagelist); |
| |
pp->pr_curpage = ph; |
| |
} |
| |
} |
| |
|
| |
/* |
| |
* Return resource to the pool. |
| |
*/ |
| |
#ifdef POOL_DIAGNOSTIC |
| |
void |
| |
_pool_put(struct pool *pp, void *v, const char *file, long line) |
| |
{ |
| |
struct pool_pagelist pq; |
| |
|
| |
LIST_INIT(&pq); |
| |
|
| |
mutex_enter(&pp->pr_lock); |
| |
pr_enter(pp, file, line); |
| |
|
| |
pr_log(pp, v, PRLOG_PUT, file, line); |
| |
|
| |
pool_do_put(pp, v, &pq); |
| |
|
| |
pr_leave(pp); |
| |
mutex_exit(&pp->pr_lock); |
| |
|
| |
pr_pagelist_free(pp, &pq); |
| |
} |
| |
#undef pool_put |
| |
#endif /* POOL_DIAGNOSTIC */ |
| |
|
| |
void |
| |
pool_put(struct pool *pp, void *v) |
| |
{ |
| |
struct pool_pagelist pq; |
| |
|
| |
LIST_INIT(&pq); |
| |
|
| |
mutex_enter(&pp->pr_lock); |
| |
pool_do_put(pp, v, &pq); |
| |
mutex_exit(&pp->pr_lock); |
| |
|
| |
pr_pagelist_free(pp, &pq); |
| |
} |
| |
|
| |
#ifdef POOL_DIAGNOSTIC |
| |
#define pool_put(h, v) _pool_put((h), (v), __FILE__, __LINE__) |
| |
#endif |
| |
|
| |
/* |
| |
* pool_grow: grow a pool by a page. |
| |
* |
| |
* => called with pool locked. |
| |
* => unlock and relock the pool. |
| |
* => return with pool locked. |
| |
*/ |
| |
|
| |
static int |
| |
pool_grow(struct pool *pp, int flags) |
| |
{ |
| |
struct pool_item_header *ph = NULL; |
| |
char *cp; |
| |
|
| |
mutex_exit(&pp->pr_lock); |
| |
cp = pool_allocator_alloc(pp, flags); |
| |
if (__predict_true(cp != NULL)) { |
| |
ph = pool_alloc_item_header(pp, cp, flags); |
| |
} |
| |
if (__predict_false(cp == NULL || ph == NULL)) { |
| |
if (cp != NULL) { |
| |
pool_allocator_free(pp, cp); |
| |
} |
| |
mutex_enter(&pp->pr_lock); |
| |
return ENOMEM; |
| |
} |
| |
|
| |
mutex_enter(&pp->pr_lock); |
| |
pool_prime_page(pp, cp, ph); |
| |
pp->pr_npagealloc++; |
| |
return 0; |
| |
} |
| |
|
| |
/* |
| |
* Add N items to the pool. |
| |
*/ |
| |
int |
| |
pool_prime(struct pool *pp, int n) |
| |
{ |
| |
int newpages; |
| |
int error = 0; |
| |
|
| |
mutex_enter(&pp->pr_lock); |
| |
|
| |
newpages = roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
| |
|
| |
while (newpages-- > 0) { |
| |
error = pool_grow(pp, PR_NOWAIT); |
| |
if (error) { |
| |
break; |
| |
} |
| |
pp->pr_minpages++; |
| |
} |
| |
|
| |
if (pp->pr_minpages >= pp->pr_maxpages) |
| |
pp->pr_maxpages = pp->pr_minpages + 1; /* XXX */ |
| |
|
| |
mutex_exit(&pp->pr_lock); |
| |
return error; |
| |
} |
| |
|
| |
/* |
| |
* Add a page worth of items to the pool. |
| |
* |
| |
* Note, we must be called with the pool descriptor LOCKED. |
| |
*/ |
| |
static void |
| |
pool_prime_page(struct pool *pp, void *storage, struct pool_item_header *ph) |
| |
{ |
| |
struct pool_item *pi; |
| |
void *cp = storage; |
| |
const unsigned int align = pp->pr_align; |
| |
const unsigned int ioff = pp->pr_itemoffset; |
| |
int n; |
| |
|
| |
KASSERT(mutex_owned(&pp->pr_lock)); |
| |
|
| |
#ifdef DIAGNOSTIC |
| |
if ((pp->pr_roflags & PR_NOALIGN) == 0 && |
| |
((uintptr_t)cp & (pp->pr_alloc->pa_pagesz - 1)) != 0) |
| |
panic("pool_prime_page: %s: unaligned page", pp->pr_wchan); |
| |
#endif |
| |
|
| |
/* |
| |
* Insert page header. |
| |
*/ |
| |
LIST_INSERT_HEAD(&pp->pr_emptypages, ph, ph_pagelist); |
| |
LIST_INIT(&ph->ph_itemlist); |
| |
ph->ph_page = storage; |
| |
ph->ph_nmissing = 0; |
| |
ph->ph_time = time_uptime; |
| |
if ((pp->pr_roflags & PR_PHINPAGE) == 0) |
| |
SPLAY_INSERT(phtree, &pp->pr_phtree, ph); |
| |
|
| |
pp->pr_nidle++; |
| |
|
| |
/* |
| |
* Color this page. |
| |
*/ |
| |
ph->ph_off = pp->pr_curcolor; |
| |
cp = (char *)cp + ph->ph_off; |
| |
if ((pp->pr_curcolor += align) > pp->pr_maxcolor) |
| |
pp->pr_curcolor = 0; |
| |
|
| |
/* |
| |
* Adjust storage to apply aligment to `pr_itemoffset' in each item. |
| |
*/ |
| |
if (ioff != 0) |
| |
cp = (char *)cp + align - ioff; |
| |
|
| |
KASSERT((((vaddr_t)cp + ioff) & (align - 1)) == 0); |
| |
|
| |
/* |
| |
* Insert remaining chunks on the bucket list. |
| |
*/ |
| |
n = pp->pr_itemsperpage; |
| |
pp->pr_nitems += n; |
| |
|
| |
if (pp->pr_roflags & PR_NOTOUCH) { |
| |
pr_item_notouch_init(pp, ph); |
| |
} else { |
| |
while (n--) { |
| |
pi = (struct pool_item *)cp; |
| |
|
| |
KASSERT(((((vaddr_t)pi) + ioff) & (align - 1)) == 0); |
| |
|
| |
/* Insert on page list */ |
| |
LIST_INSERT_HEAD(&ph->ph_itemlist, pi, pi_list); |
| |
#ifdef DIAGNOSTIC |
| |
pi->pi_magic = PI_MAGIC; |
| |
#endif |
| |
cp = (char *)cp + pp->pr_size; |
| |
|
| |
KASSERT((((vaddr_t)cp + ioff) & (align - 1)) == 0); |
| |
} |
| |
} |
| |
|
| |
/* |
| |
* If the pool was depleted, point at the new page. |
| |
*/ |
| |
if (pp->pr_curpage == NULL) |
| |
pp->pr_curpage = ph; |
| |
|
| |
if (++pp->pr_npages > pp->pr_hiwat) |
| |
pp->pr_hiwat = pp->pr_npages; |
| |
} |
| |
|
| |
/* |
| |
* Used by pool_get() when nitems drops below the low water mark. This |
| |
* is used to catch up pr_nitems with the low water mark. |
| |
* |
| |
* Note 1, we never wait for memory here, we let the caller decide what to do. |
| |
* |
| |
* Note 2, we must be called with the pool already locked, and we return |
| |
* with it locked. |
| |
*/ |
| |
static int |
| |
pool_catchup(struct pool *pp) |
| |
{ |
| |
int error = 0; |
| |
|
| |
while (POOL_NEEDS_CATCHUP(pp)) { |
| |
error = pool_grow(pp, PR_NOWAIT); |
| |
if (error) { |
| |
break; |
| |
} |
| |
} |
| |
return error; |
| |
} |
| |
|
| |
static void |
| |
pool_update_curpage(struct pool *pp) |
| |
{ |
| |
|
| |
pp->pr_curpage = LIST_FIRST(&pp->pr_partpages); |
| |
if (pp->pr_curpage == NULL) { |
| |
pp->pr_curpage = LIST_FIRST(&pp->pr_emptypages); |
| |
} |
| |
KASSERT((pp->pr_curpage == NULL && pp->pr_nitems == 0) || |
| |
(pp->pr_curpage != NULL && pp->pr_nitems > 0)); |
| |
} |
| |
|
| |
void |
| |
pool_setlowat(struct pool *pp, int n) |
| |
{ |
| |
|
| |
mutex_enter(&pp->pr_lock); |
| |
|
| |
pp->pr_minitems = n; |
| |
pp->pr_minpages = (n == 0) |
| |
? 0 |
| |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
| |
|
| |
/* Make sure we're caught up with the newly-set low water mark. */ |
| |
if (POOL_NEEDS_CATCHUP(pp) && pool_catchup(pp) != 0) { |
| |
/* |
| |
* XXX: Should we log a warning? Should we set up a timeout |
| |
* to try again in a second or so? The latter could break |
| |
* a caller's assumptions about interrupt protection, etc. |
| |
*/ |
| |
} |
| |
|
| |
mutex_exit(&pp->pr_lock); |
| |
} |
| |
|
| |
void |
| |
pool_sethiwat(struct pool *pp, int n) |
| |
{ |
| |
|
| |
mutex_enter(&pp->pr_lock); |
| |
|
| |
pp->pr_maxpages = (n == 0) |
| |
? 0 |
| |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
| |
|
| |
mutex_exit(&pp->pr_lock); |
| |
} |
| |
|
| |
void |
| |
pool_sethardlimit(struct pool *pp, int n, const char *warnmess, int ratecap) |
| |
{ |
| |
|
| |
mutex_enter(&pp->pr_lock); |
| |
|
| |
pp->pr_hardlimit = n; |
| |
pp->pr_hardlimit_warning = warnmess; |
| |
pp->pr_hardlimit_ratecap.tv_sec = ratecap; |
| |
pp->pr_hardlimit_warning_last.tv_sec = 0; |
| |
pp->pr_hardlimit_warning_last.tv_usec = 0; |
| |
|
| |
/* |
| |
* In-line version of pool_sethiwat(), because we don't want to |
| |
* release the lock. |
| |
*/ |
| |
pp->pr_maxpages = (n == 0) |
| |
? 0 |
| |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
| |
|
| |
mutex_exit(&pp->pr_lock); |
| |
} |
| |
|
| |
/* |
| |
* Release all complete pages that have not been used recently. |
| |
*/ |
| |
int |
| |
#ifdef POOL_DIAGNOSTIC |
| |
_pool_reclaim(struct pool *pp, const char *file, long line) |
| |
#else |
| |
pool_reclaim(struct pool *pp) |
| |
#endif |
| |
{ |
| |
struct pool_item_header *ph, *phnext; |
| |
struct pool_pagelist pq; |
| |
uint32_t curtime; |
| |
bool klock; |
| |
int rv; |
| |
|
| |
if (pp->pr_drain_hook != NULL) { |
| |
/* |
| |
* The drain hook must be called with the pool unlocked. |
| |
*/ |
| |
(*pp->pr_drain_hook)(pp->pr_drain_hook_arg, PR_NOWAIT); |
| |
} |
| |
|
| |
/* |
| |
* XXXSMP Because we do not want to cause non-MPSAFE code |
| |
* to block. |
| |
*/ |
| |
if (pp->pr_ipl == IPL_SOFTNET || pp->pr_ipl == IPL_SOFTCLOCK || |
| |
pp->pr_ipl == IPL_SOFTSERIAL) { |
| |
KERNEL_LOCK(1, NULL); |
| |
klock = true; |
| |
} else |
| |
klock = false; |
| |
|
| |
/* Reclaim items from the pool's cache (if any). */ |
| |
if (pp->pr_cache != NULL) |
| |
pool_cache_invalidate(pp->pr_cache); |
| |
|
| |
if (mutex_tryenter(&pp->pr_lock) == 0) { |
| |
if (klock) { |
| |
KERNEL_UNLOCK_ONE(NULL); |
| |
} |
| |
return (0); |
| |
} |
| |
pr_enter(pp, file, line); |
| |
|
| |
LIST_INIT(&pq); |
| |
|
| |
curtime = time_uptime; |
| |
|
| |
for (ph = LIST_FIRST(&pp->pr_emptypages); ph != NULL; ph = phnext) { |
| |
phnext = LIST_NEXT(ph, ph_pagelist); |
| |
|
| |
/* Check our minimum page claim */ |
| |
if (pp->pr_npages <= pp->pr_minpages) |
| |
break; |
| |
|
| |
KASSERT(ph->ph_nmissing == 0); |
| |
if (curtime - ph->ph_time < pool_inactive_time |
| |
&& !pa_starved_p(pp->pr_alloc)) |
| |
continue; |
| |
|
| |
/* |
| |
* If freeing this page would put us below |
| |
* the low water mark, stop now. |
| |
*/ |
| |
if ((pp->pr_nitems - pp->pr_itemsperpage) < |
| |
pp->pr_minitems) |
| |
break; |
| |
|
| |
pr_rmpage(pp, ph, &pq); |
| |
} |
| |
|
| |
pr_leave(pp); |
| |
mutex_exit(&pp->pr_lock); |
| |
|
| |
if (LIST_EMPTY(&pq)) |
| |
rv = 0; |
| |
else { |
| |
pr_pagelist_free(pp, &pq); |
| |
rv = 1; |
| |
} |
| |
|
| |
if (klock) { |
| |
KERNEL_UNLOCK_ONE(NULL); |
| |
} |
| |
|
| |
return (rv); |
| |
} |
| |
|
| |
/* |
| |
* Drain pools, one at a time. This is a two stage process; |
| |
* drain_start kicks off a cross call to drain CPU-level caches |
| |
* if the pool has an associated pool_cache. drain_end waits |
| |
* for those cross calls to finish, and then drains the cache |
| |
* (if any) and pool. |
| |
* |
| |
* Note, must never be called from interrupt context. |
| |
*/ |
| |
void |
| |
pool_drain_start(struct pool **ppp, uint64_t *wp) |
| |
{ |
| |
struct pool *pp; |
| |
|
| |
KASSERT(!TAILQ_EMPTY(&pool_head)); |
| |
|
| |
pp = NULL; |
| |
|
| |
/* Find next pool to drain, and add a reference. */ |
| |
mutex_enter(&pool_head_lock); |
| |
do { |
| |
if (drainpp == NULL) { |
| |
drainpp = TAILQ_FIRST(&pool_head); |
| |
} |
| |
if (drainpp != NULL) { |
| |
pp = drainpp; |
| |
drainpp = TAILQ_NEXT(pp, pr_poollist); |
| |
} |
| |
/* |
| |
* Skip completely idle pools. We depend on at least |
| |
* one pool in the system being active. |
| |
*/ |
| |
} while (pp == NULL || pp->pr_npages == 0); |
| |
pp->pr_refcnt++; |
| |
mutex_exit(&pool_head_lock); |
| |
|
| |
/* If there is a pool_cache, drain CPU level caches. */ |
| |
*ppp = pp; |
| |
if (pp->pr_cache != NULL) { |
| |
*wp = xc_broadcast(0, (xcfunc_t)pool_cache_xcall, |
| |
pp->pr_cache, NULL); |
| |
} |
| |
} |
| |
|
| |
void |
| |
pool_drain_end(struct pool *pp, uint64_t where) |
| |
{ |
| |
|
| |
if (pp == NULL) |
| |
return; |
| |
|
| |
KASSERT(pp->pr_refcnt > 0); |
| |
|
| |
/* Wait for remote draining to complete. */ |
| |
if (pp->pr_cache != NULL) |
| |
xc_wait(where); |
| |
|
| |
/* Drain the cache (if any) and pool.. */ |
| |
pool_reclaim(pp); |
| |
|
| |
/* Finally, unlock the pool. */ |
| |
mutex_enter(&pool_head_lock); |
| |
pp->pr_refcnt--; |
| |
cv_broadcast(&pool_busy); |
| |
mutex_exit(&pool_head_lock); |
| |
} |
| |
|
| |
/* |
| |
* Diagnostic helpers. |
| |
*/ |
| |
void |
| |
pool_print(struct pool *pp, const char *modif) |
| |
{ |
| |
|
| |
pool_print1(pp, modif, printf); |
| |
} |
| |
|
| |
void |
| |
pool_printall(const char *modif, void (*pr)(const char *, ...)) |
| |
{ |
| |
struct pool *pp; |
| |
|
| |
TAILQ_FOREACH(pp, &pool_head, pr_poollist) { |
| |
pool_printit(pp, modif, pr); |
| |
} |
| |
} |
| |
|
| |
void |
| |
pool_printit(struct pool *pp, const char *modif, void (*pr)(const char *, ...)) |
| |
{ |
| |
|
| |
if (pp == NULL) { |
| |
(*pr)("Must specify a pool to print.\n"); |
| |
return; |
| |
} |
| |
|
| |
pool_print1(pp, modif, pr); |
| |
} |
| |
|
| |
static void |
| |
pool_print_pagelist(struct pool *pp, struct pool_pagelist *pl, |
| |
void (*pr)(const char *, ...)) |
| |
{ |
| |
struct pool_item_header *ph; |
| |
#ifdef DIAGNOSTIC |
| |
struct pool_item *pi; |
| |
#endif |
| |
|
| |
LIST_FOREACH(ph, pl, ph_pagelist) { |
| |
(*pr)("\t\tpage %p, nmissing %d, time %" PRIu32 "\n", |
| |
ph->ph_page, ph->ph_nmissing, ph->ph_time); |
| |
#ifdef DIAGNOSTIC |
| |
if (!(pp->pr_roflags & PR_NOTOUCH)) { |
| |
LIST_FOREACH(pi, &ph->ph_itemlist, pi_list) { |
| |
if (pi->pi_magic != PI_MAGIC) { |
| |
(*pr)("\t\t\titem %p, magic 0x%x\n", |
| |
pi, pi->pi_magic); |
| |
} |
| |
} |
| |
} |
| |
#endif |
| |
} |
| |
} |
| |
|
| |
static void |
| |
pool_print1(struct pool *pp, const char *modif, void (*pr)(const char *, ...)) |
| |
{ |
| |
struct pool_item_header *ph; |
| |
pool_cache_t pc; |
| |
pcg_t *pcg; |
| |
pool_cache_cpu_t *cc; |
| |
uint64_t cpuhit, cpumiss; |
| |
int i, print_log = 0, print_pagelist = 0, print_cache = 0; |
| |
char c; |
| |
|
| |
while ((c = *modif++) != '\0') { |
| |
if (c == 'l') |
| |
print_log = 1; |
| |
if (c == 'p') |
| |
print_pagelist = 1; |
| |
if (c == 'c') |
| |
print_cache = 1; |
| |
} |
| |
|
| |
if ((pc = pp->pr_cache) != NULL) { |
| |
(*pr)("POOL CACHE"); |
| |
} else { |
| |
(*pr)("POOL"); |
| |
} |
| |
|
| |
(*pr)(" %s: size %u, align %u, ioff %u, roflags 0x%08x\n", |
| |
pp->pr_wchan, pp->pr_size, pp->pr_align, pp->pr_itemoffset, |
| |
pp->pr_roflags); |
| |
(*pr)("\talloc %p\n", pp->pr_alloc); |
| |
(*pr)("\tminitems %u, minpages %u, maxpages %u, npages %u\n", |
| |
pp->pr_minitems, pp->pr_minpages, pp->pr_maxpages, pp->pr_npages); |
| |
(*pr)("\titemsperpage %u, nitems %u, nout %u, hardlimit %u\n", |
| |
pp->pr_itemsperpage, pp->pr_nitems, pp->pr_nout, pp->pr_hardlimit); |
| |
|
| |
(*pr)("\tnget %lu, nfail %lu, nput %lu\n", |
| |
pp->pr_nget, pp->pr_nfail, pp->pr_nput); |
| |
(*pr)("\tnpagealloc %lu, npagefree %lu, hiwat %u, nidle %lu\n", |
| |
pp->pr_npagealloc, pp->pr_npagefree, pp->pr_hiwat, pp->pr_nidle); |
| |
|
| |
if (print_pagelist == 0) |
| |
goto skip_pagelist; |
| |
|
| |
if ((ph = LIST_FIRST(&pp->pr_emptypages)) != NULL) |
| |
(*pr)("\n\tempty page list:\n"); |
| |
pool_print_pagelist(pp, &pp->pr_emptypages, pr); |
| |
if ((ph = LIST_FIRST(&pp->pr_fullpages)) != NULL) |
| |
(*pr)("\n\tfull page list:\n"); |
| |
pool_print_pagelist(pp, &pp->pr_fullpages, pr); |
| |
if ((ph = LIST_FIRST(&pp->pr_partpages)) != NULL) |
| |
(*pr)("\n\tpartial-page list:\n"); |
| |
pool_print_pagelist(pp, &pp->pr_partpages, pr); |
| |
|
| |
if (pp->pr_curpage == NULL) |
| |
(*pr)("\tno current page\n"); |
| |
else |
| |
(*pr)("\tcurpage %p\n", pp->pr_curpage->ph_page); |
| |
|
| |
skip_pagelist: |
| |
if (print_log == 0) |
| |
goto skip_log; |
| |
|
| |
(*pr)("\n"); |
| |
if ((pp->pr_roflags & PR_LOGGING) == 0) |
| |
(*pr)("\tno log\n"); |
| |
else { |
| |
pr_printlog(pp, NULL, pr); |
| |
} |
| |
|
| |
skip_log: |
| |
|
| |
#define PR_GROUPLIST(pcg) \ |
| |
(*pr)("\t\tgroup %p: avail %d\n", pcg, pcg->pcg_avail); \ |
| |
for (i = 0; i < pcg->pcg_size; i++) { \ |
| |
if (pcg->pcg_objects[i].pcgo_pa != \ |
| |
POOL_PADDR_INVALID) { \ |
| |
(*pr)("\t\t\t%p, 0x%llx\n", \ |
| |
pcg->pcg_objects[i].pcgo_va, \ |
| |
(unsigned long long) \ |
| |
pcg->pcg_objects[i].pcgo_pa); \ |
| |
} else { \ |
| |
(*pr)("\t\t\t%p\n", \ |
| |
pcg->pcg_objects[i].pcgo_va); \ |
| |
} \ |
| |
} |
| |
|
| |
if (pc != NULL) { |
| |
cpuhit = 0; |
| |
cpumiss = 0; |
| |
for (i = 0; i < MAXCPUS; i++) { |
| |
if ((cc = pc->pc_cpus[i]) == NULL) |
| |
continue; |
| |
cpuhit += cc->cc_hits; |
| |
cpumiss += cc->cc_misses; |
| |
} |
| |
(*pr)("\tcpu layer hits %llu misses %llu\n", cpuhit, cpumiss); |
| |
(*pr)("\tcache layer hits %llu misses %llu\n", |
| |
pc->pc_hits, pc->pc_misses); |
| |
(*pr)("\tcache layer entry uncontended %llu contended %llu\n", |
| |
pc->pc_hits + pc->pc_misses - pc->pc_contended, |
| |
pc->pc_contended); |
| |
(*pr)("\tcache layer empty groups %u full groups %u\n", |
| |
pc->pc_nempty, pc->pc_nfull); |
| |
if (print_cache) { |
| |
(*pr)("\tfull cache groups:\n"); |
| |
for (pcg = pc->pc_fullgroups; pcg != NULL; |
| |
pcg = pcg->pcg_next) { |
| |
PR_GROUPLIST(pcg); |
| |
} |
| |
(*pr)("\tempty cache groups:\n"); |
| |
for (pcg = pc->pc_emptygroups; pcg != NULL; |
| |
pcg = pcg->pcg_next) { |
| |
PR_GROUPLIST(pcg); |
| |
} |
| |
} |
| |
} |
| |
#undef PR_GROUPLIST |
| |
|
| |
pr_enter_check(pp, pr); |
| |
} |
| |
|
| |
static int |
| |
pool_chk_page(struct pool *pp, const char *label, struct pool_item_header *ph) |
| |
{ |
| |
struct pool_item *pi; |
| |
void *page; |
| |
int n; |
| |
|
| |
if ((pp->pr_roflags & PR_NOALIGN) == 0) { |
| |
page = (void *)((uintptr_t)ph & pp->pr_alloc->pa_pagemask); |
| |
if (page != ph->ph_page && |
| |
(pp->pr_roflags & PR_PHINPAGE) != 0) { |
| |
if (label != NULL) |
| |
printf("%s: ", label); |
| |
printf("pool(%p:%s): page inconsistency: page %p;" |
| |
" at page head addr %p (p %p)\n", pp, |
| |
pp->pr_wchan, ph->ph_page, |
| |
ph, page); |
| |
return 1; |
| |
} |
| |
} |
| |
|
| |
if ((pp->pr_roflags & PR_NOTOUCH) != 0) |
| |
return 0; |
| |
|
| |
for (pi = LIST_FIRST(&ph->ph_itemlist), n = 0; |
| |
pi != NULL; |
| |
pi = LIST_NEXT(pi,pi_list), n++) { |
| |
|
| |
#ifdef DIAGNOSTIC |
| |
if (pi->pi_magic != PI_MAGIC) { |
| |
if (label != NULL) |
| |
printf("%s: ", label); |
| |
printf("pool(%s): free list modified: magic=%x;" |
| |
" page %p; item ordinal %d; addr %p\n", |
| |
pp->pr_wchan, pi->pi_magic, ph->ph_page, |
| |
n, pi); |
| |
panic("pool"); |
| |
} |
| |
#endif |
| |
if ((pp->pr_roflags & PR_NOALIGN) != 0) { |
| |
continue; |
| |
} |
| |
page = (void *)((uintptr_t)pi & pp->pr_alloc->pa_pagemask); |
| |
if (page == ph->ph_page) |
| |
continue; |
| |
|
| |
if (label != NULL) |
| |
printf("%s: ", label); |
| |
printf("pool(%p:%s): page inconsistency: page %p;" |
| |
" item ordinal %d; addr %p (p %p)\n", pp, |
| |
pp->pr_wchan, ph->ph_page, |
| |
n, pi, page); |
| |
return 1; |
| |
} |
| |
return 0; |
| |
} |
| |
|
| |
|
| |
int |
| |
pool_chk(struct pool *pp, const char *label) |
| |
{ |
| |
struct pool_item_header *ph; |
| |
int r = 0; |
| |
|
| |
mutex_enter(&pp->pr_lock); |
| |
LIST_FOREACH(ph, &pp->pr_emptypages, ph_pagelist) { |
| |
r = pool_chk_page(pp, label, ph); |
| |
if (r) { |
| |
goto out; |
| |
} |
| |
} |
| |
LIST_FOREACH(ph, &pp->pr_fullpages, ph_pagelist) { |
| |
r = pool_chk_page(pp, label, ph); |
| |
if (r) { |
| |
goto out; |
| |
} |
| |
} |
| |
LIST_FOREACH(ph, &pp->pr_partpages, ph_pagelist) { |
| |
r = pool_chk_page(pp, label, ph); |
| |
if (r) { |
| |
goto out; |
| |
} |
| |
} |
| |
|
| |
out: |
| |
mutex_exit(&pp->pr_lock); |
| |
return (r); |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_init: |
| |
* |
| |
* Initialize a pool cache. |
| |
*/ |
| |
pool_cache_t |
| |
pool_cache_init(size_t size, u_int align, u_int align_offset, u_int flags, |
| |
const char *wchan, struct pool_allocator *palloc, int ipl, |
| |
int (*ctor)(void *, void *, int), void (*dtor)(void *, void *), void *arg) |
| |
{ |
| |
pool_cache_t pc; |
| |
|
| |
pc = pool_get(&cache_pool, PR_WAITOK); |
| |
if (pc == NULL) |
| |
return NULL; |
| |
|
| |
pool_cache_bootstrap(pc, size, align, align_offset, flags, wchan, |
| |
palloc, ipl, ctor, dtor, arg); |
| |
|
| |
return pc; |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_bootstrap: |
| |
* |
| |
* Kernel-private version of pool_cache_init(). The caller |
| |
* provides initial storage. |
| |
*/ |
| |
void |
| |
pool_cache_bootstrap(pool_cache_t pc, size_t size, u_int align, |
| |
u_int align_offset, u_int flags, const char *wchan, |
| |
struct pool_allocator *palloc, int ipl, |
| |
int (*ctor)(void *, void *, int), void (*dtor)(void *, void *), |
| |
void *arg) |
| |
{ |
| |
CPU_INFO_ITERATOR cii; |
| |
pool_cache_t pc1; |
| |
struct cpu_info *ci; |
| |
struct pool *pp; |
| |
|
| |
pp = &pc->pc_pool; |
| |
if (palloc == NULL && ipl == IPL_NONE) |
| |
palloc = &pool_allocator_nointr; |
| |
pool_init(pp, size, align, align_offset, flags, wchan, palloc, ipl); |
| |
mutex_init(&pc->pc_lock, MUTEX_DEFAULT, ipl); |
| |
|
| |
if (ctor == NULL) { |
| |
ctor = (int (*)(void *, void *, int))nullop; |
| |
} |
| |
if (dtor == NULL) { |
| |
dtor = (void (*)(void *, void *))nullop; |
| |
} |
| |
|
| |
pc->pc_emptygroups = NULL; |
| |
pc->pc_fullgroups = NULL; |
| |
pc->pc_partgroups = NULL; |
| |
pc->pc_ctor = ctor; |
| |
pc->pc_dtor = dtor; |
| |
pc->pc_arg = arg; |
| |
pc->pc_hits = 0; |
| |
pc->pc_misses = 0; |
| |
pc->pc_nempty = 0; |
| |
pc->pc_npart = 0; |
| |
pc->pc_nfull = 0; |
| |
pc->pc_contended = 0; |
| |
pc->pc_refcnt = 0; |
| |
pc->pc_freecheck = NULL; |
| |
|
| |
if ((flags & PR_LARGECACHE) != 0) { |
| |
pc->pc_pcgsize = PCG_NOBJECTS_LARGE; |
| |
pc->pc_pcgpool = &pcg_large_pool; |
| |
} else { |
| |
pc->pc_pcgsize = PCG_NOBJECTS_NORMAL; |
| |
pc->pc_pcgpool = &pcg_normal_pool; |
| |
} |
| |
|
| |
/* Allocate per-CPU caches. */ |
| |
memset(pc->pc_cpus, 0, sizeof(pc->pc_cpus)); |
| |
pc->pc_ncpu = 0; |
| |
if (ncpu < 2) { |
| |
/* XXX For sparc: boot CPU is not attached yet. */ |
| |
pool_cache_cpu_init1(curcpu(), pc); |
| |
} else { |
| |
for (CPU_INFO_FOREACH(cii, ci)) { |
| |
pool_cache_cpu_init1(ci, pc); |
| |
} |
| |
} |
| |
|
| |
/* Add to list of all pools. */ |
| |
if (__predict_true(!cold)) |
| |
mutex_enter(&pool_head_lock); |
| |
TAILQ_FOREACH(pc1, &pool_cache_head, pc_cachelist) { |
| |
if (strcmp(pc1->pc_pool.pr_wchan, pc->pc_pool.pr_wchan) > 0) |
| |
break; |
| |
} |
| |
if (pc1 == NULL) |
| |
TAILQ_INSERT_TAIL(&pool_cache_head, pc, pc_cachelist); |
| |
else |
| |
TAILQ_INSERT_BEFORE(pc1, pc, pc_cachelist); |
| |
if (__predict_true(!cold)) |
| |
mutex_exit(&pool_head_lock); |
| |
|
| |
membar_sync(); |
| |
pp->pr_cache = pc; |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_destroy: |
| |
* |
| |
* Destroy a pool cache. |
| |
*/ |
| |
void |
| |
pool_cache_destroy(pool_cache_t pc) |
| |
{ |
| |
struct pool *pp = &pc->pc_pool; |
| |
pool_cache_cpu_t *cc; |
| |
pcg_t *pcg; |
| |
int i; |
| |
|
| |
/* Remove it from the global list. */ |
| |
mutex_enter(&pool_head_lock); |
| |
while (pc->pc_refcnt != 0) |
| |
cv_wait(&pool_busy, &pool_head_lock); |
| |
TAILQ_REMOVE(&pool_cache_head, pc, pc_cachelist); |
| |
mutex_exit(&pool_head_lock); |
| |
|
| |
/* First, invalidate the entire cache. */ |
| |
pool_cache_invalidate(pc); |
| |
|
| |
/* Disassociate it from the pool. */ |
| |
mutex_enter(&pp->pr_lock); |
| |
pp->pr_cache = NULL; |
| |
mutex_exit(&pp->pr_lock); |
| |
|
| |
/* Destroy per-CPU data */ |
| |
for (i = 0; i < MAXCPUS; i++) { |
| |
if ((cc = pc->pc_cpus[i]) == NULL) |
| |
continue; |
| |
if ((pcg = cc->cc_current) != &pcg_dummy) { |
| |
pcg->pcg_next = NULL; |
| |
pool_cache_invalidate_groups(pc, pcg); |
| |
} |
| |
if ((pcg = cc->cc_previous) != &pcg_dummy) { |
| |
pcg->pcg_next = NULL; |
| |
pool_cache_invalidate_groups(pc, pcg); |
| |
} |
| |
if (cc != &pc->pc_cpu0) |
| |
pool_put(&cache_cpu_pool, cc); |
| |
} |
| |
|
| |
/* Finally, destroy it. */ |
| |
mutex_destroy(&pc->pc_lock); |
| |
pool_destroy(pp); |
| |
pool_put(&cache_pool, pc); |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_cpu_init1: |
| |
* |
| |
* Called for each pool_cache whenever a new CPU is attached. |
| |
*/ |
| |
static void |
| |
pool_cache_cpu_init1(struct cpu_info *ci, pool_cache_t pc) |
| |
{ |
| |
pool_cache_cpu_t *cc; |
| |
int index; |
| |
|
| |
index = ci->ci_index; |
| |
|
| |
KASSERT(index < MAXCPUS); |
| |
|
| |
if ((cc = pc->pc_cpus[index]) != NULL) { |
| |
KASSERT(cc->cc_cpuindex == index); |
| |
return; |
| |
} |
| |
|
| |
/* |
| |
* The first CPU is 'free'. This needs to be the case for |
| |
* bootstrap - we may not be able to allocate yet. |
| |
*/ |
| |
if (pc->pc_ncpu == 0) { |
| |
cc = &pc->pc_cpu0; |
| |
pc->pc_ncpu = 1; |
| |
} else { |
| |
mutex_enter(&pc->pc_lock); |
| |
pc->pc_ncpu++; |
| |
mutex_exit(&pc->pc_lock); |
| |
cc = pool_get(&cache_cpu_pool, PR_WAITOK); |
| |
} |
| |
|
| |
cc->cc_ipl = pc->pc_pool.pr_ipl; |
| |
cc->cc_iplcookie = makeiplcookie(cc->cc_ipl); |
| |
cc->cc_cache = pc; |
| |
cc->cc_cpuindex = index; |
| |
cc->cc_hits = 0; |
| |
cc->cc_misses = 0; |
| |
cc->cc_current = __UNCONST(&pcg_dummy); |
| |
cc->cc_previous = __UNCONST(&pcg_dummy); |
| |
|
| |
pc->pc_cpus[index] = cc; |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_cpu_init: |
| |
* |
| |
* Called whenever a new CPU is attached. |
| |
*/ |
| |
void |
| |
pool_cache_cpu_init(struct cpu_info *ci) |
| |
{ |
| |
pool_cache_t pc; |
| |
|
| |
mutex_enter(&pool_head_lock); |
| |
TAILQ_FOREACH(pc, &pool_cache_head, pc_cachelist) { |
| |
pc->pc_refcnt++; |
| |
mutex_exit(&pool_head_lock); |
| |
|
| |
pool_cache_cpu_init1(ci, pc); |
| |
|
| |
mutex_enter(&pool_head_lock); |
| |
pc->pc_refcnt--; |
| |
cv_broadcast(&pool_busy); |
| |
} |
| |
mutex_exit(&pool_head_lock); |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_reclaim: |
| |
* |
| |
* Reclaim memory from a pool cache. |
| |
*/ |
| |
bool |
| |
pool_cache_reclaim(pool_cache_t pc) |
| |
{ |
| |
|
| |
return pool_reclaim(&pc->pc_pool); |
| |
} |
| |
|
| |
static void |
| |
pool_cache_destruct_object1(pool_cache_t pc, void *object) |
| |
{ |
| |
|
| |
(*pc->pc_dtor)(pc->pc_arg, object); |
| |
pool_put(&pc->pc_pool, object); |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_destruct_object: |
| |
* |
| |
* Force destruction of an object and its release back into |
| |
* the pool. |
| |
*/ |
| |
void |
| |
pool_cache_destruct_object(pool_cache_t pc, void *object) |
| |
{ |
| |
|
| |
FREECHECK_IN(&pc->pc_freecheck, object); |
| |
|
| |
pool_cache_destruct_object1(pc, object); |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_invalidate_groups: |
| |
* |
| |
* Invalidate a chain of groups and destruct all objects. |
| |
*/ |
| |
static void |
| |
pool_cache_invalidate_groups(pool_cache_t pc, pcg_t *pcg) |
| |
{ |
| |
void *object; |
| |
pcg_t *next; |
| |
int i; |
| |
|
| |
for (; pcg != NULL; pcg = next) { |
| |
next = pcg->pcg_next; |
| |
|
| |
for (i = 0; i < pcg->pcg_avail; i++) { |
| |
object = pcg->pcg_objects[i].pcgo_va; |
| |
pool_cache_destruct_object1(pc, object); |
| |
} |
| |
|
| |
if (pcg->pcg_size == PCG_NOBJECTS_LARGE) { |
| |
pool_put(&pcg_large_pool, pcg); |
| |
} else { |
| |
KASSERT(pcg->pcg_size == PCG_NOBJECTS_NORMAL); |
| |
pool_put(&pcg_normal_pool, pcg); |
| |
} |
| |
} |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_invalidate: |
| |
* |
| |
* Invalidate a pool cache (destruct and release all of the |
| |
* cached objects). Does not reclaim objects from the pool. |
| |
*/ |
| |
void |
| |
pool_cache_invalidate(pool_cache_t pc) |
| |
{ |
| |
pcg_t *full, *empty, *part; |
| |
|
| |
mutex_enter(&pc->pc_lock); |
| |
full = pc->pc_fullgroups; |
| |
empty = pc->pc_emptygroups; |
| |
part = pc->pc_partgroups; |
| |
pc->pc_fullgroups = NULL; |
| |
pc->pc_emptygroups = NULL; |
| |
pc->pc_partgroups = NULL; |
| |
pc->pc_nfull = 0; |
| |
pc->pc_nempty = 0; |
| |
pc->pc_npart = 0; |
| |
mutex_exit(&pc->pc_lock); |
| |
|
| |
pool_cache_invalidate_groups(pc, full); |
| |
pool_cache_invalidate_groups(pc, empty); |
| |
pool_cache_invalidate_groups(pc, part); |
| |
} |
| |
|
| |
void |
| |
pool_cache_set_drain_hook(pool_cache_t pc, void (*fn)(void *, int), void *arg) |
| |
{ |
| |
|
| |
pool_set_drain_hook(&pc->pc_pool, fn, arg); |
| |
} |
| |
|
| |
void |
| |
pool_cache_setlowat(pool_cache_t pc, int n) |
| |
{ |
| |
|
| |
pool_setlowat(&pc->pc_pool, n); |
| |
} |
| |
|
| |
void |
| |
pool_cache_sethiwat(pool_cache_t pc, int n) |
| |
{ |
| |
|
| |
pool_sethiwat(&pc->pc_pool, n); |
| |
} |
| |
|
| |
void |
| |
pool_cache_sethardlimit(pool_cache_t pc, int n, const char *warnmess, int ratecap) |
| |
{ |
| |
|
| |
pool_sethardlimit(&pc->pc_pool, n, warnmess, ratecap); |
| |
} |
| |
|
| |
static bool __noinline |
| |
pool_cache_get_slow(pool_cache_cpu_t *cc, int s, void **objectp, |
| |
paddr_t *pap, int flags) |
| |
{ |
| |
pcg_t *pcg, *cur; |
| |
uint64_t ncsw; |
| |
pool_cache_t pc; |
| |
void *object; |
| |
|
| |
KASSERT(cc->cc_current->pcg_avail == 0); |
| |
KASSERT(cc->cc_previous->pcg_avail == 0); |
| |
|
| |
pc = cc->cc_cache; |
| |
cc->cc_misses++; |
| |
|
| |
/* |
| |
* Nothing was available locally. Try and grab a group |
| |
* from the cache. |
| |
*/ |
| |
if (__predict_false(!mutex_tryenter(&pc->pc_lock))) { |
| |
ncsw = curlwp->l_ncsw; |
| |
mutex_enter(&pc->pc_lock); |
| |
pc->pc_contended++; |
| |
|
| |
/* |
| |
* If we context switched while locking, then |
| |
* our view of the per-CPU data is invalid: |
| |
* retry. |
| |
*/ |
| |
if (curlwp->l_ncsw != ncsw) { |
| |
mutex_exit(&pc->pc_lock); |
| |
return true; |
| |
} |
| |
} |
| |
|
| |
if (__predict_true((pcg = pc->pc_fullgroups) != NULL)) { |
| |
/* |
| |
* If there's a full group, release our empty |
| |
* group back to the cache. Install the full |
| |
* group as cc_current and return. |
| |
*/ |
| |
if (__predict_true((cur = cc->cc_current) != &pcg_dummy)) { |
| |
KASSERT(cur->pcg_avail == 0); |
| |
cur->pcg_next = pc->pc_emptygroups; |
| |
pc->pc_emptygroups = cur; |
| |
pc->pc_nempty++; |
| |
} |
| |
KASSERT(pcg->pcg_avail == pcg->pcg_size); |
| |
cc->cc_current = pcg; |
| |
pc->pc_fullgroups = pcg->pcg_next; |
| |
pc->pc_hits++; |
| |
pc->pc_nfull--; |
| |
mutex_exit(&pc->pc_lock); |
| |
return true; |
| |
} |
| |
|
| |
/* |
| |
* Nothing available locally or in cache. Take the slow |
| |
* path: fetch a new object from the pool and construct |
| |
* it. |
| |
*/ |
| |
pc->pc_misses++; |
| |
mutex_exit(&pc->pc_lock); |
| |
splx(s); |
| |
|
| |
object = pool_get(&pc->pc_pool, flags); |
| |
*objectp = object; |
| |
if (__predict_false(object == NULL)) |
| |
return false; |
| |
|
| |
if (__predict_false((*pc->pc_ctor)(pc->pc_arg, object, flags) != 0)) { |
| |
pool_put(&pc->pc_pool, object); |
| |
*objectp = NULL; |
| |
return false; |
| |
} |
| |
|
| |
KASSERT((((vaddr_t)object + pc->pc_pool.pr_itemoffset) & |
| |
(pc->pc_pool.pr_align - 1)) == 0); |
| |
|
| |
if (pap != NULL) { |
| |
#ifdef POOL_VTOPHYS |
| |
*pap = POOL_VTOPHYS(object); |
| |
#else |
| |
*pap = POOL_PADDR_INVALID; |
| |
#endif |
| |
} |
| |
|
| |
FREECHECK_OUT(&pc->pc_freecheck, object); |
| |
return false; |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_get{,_paddr}: |
| |
* |
| |
* Get an object from a pool cache (optionally returning |
| |
* the physical address of the object). |
| |
*/ |
| |
void * |
| |
pool_cache_get_paddr(pool_cache_t pc, int flags, paddr_t *pap) |
| |
{ |
| |
pool_cache_cpu_t *cc; |
| |
pcg_t *pcg; |
| |
void *object; |
| |
int s; |
| |
|
| |
#ifdef LOCKDEBUG |
| |
if (flags & PR_WAITOK) { |
| |
ASSERT_SLEEPABLE(); |
| |
} |
| |
#endif |
| |
|
| |
/* Lock out interrupts and disable preemption. */ |
| |
s = splvm(); |
| |
while (/* CONSTCOND */ true) { |
| |
/* Try and allocate an object from the current group. */ |
| |
cc = pc->pc_cpus[curcpu()->ci_index]; |
| |
KASSERT(cc->cc_cache == pc); |
| |
pcg = cc->cc_current; |
| |
if (__predict_true(pcg->pcg_avail > 0)) { |
| |
object = pcg->pcg_objects[--pcg->pcg_avail].pcgo_va; |
| |
if (__predict_false(pap != NULL)) |
| |
*pap = pcg->pcg_objects[pcg->pcg_avail].pcgo_pa; |
| |
#if defined(DIAGNOSTIC) |
| |
pcg->pcg_objects[pcg->pcg_avail].pcgo_va = NULL; |
| |
KASSERT(pcg->pcg_avail < pcg->pcg_size); |
| |
KASSERT(object != NULL); |
| |
#endif |
| |
cc->cc_hits++; |
| |
splx(s); |
| |
FREECHECK_OUT(&pc->pc_freecheck, object); |
| |
return object; |
| |
} |
| |
|
| |
/* |
| |
* That failed. If the previous group isn't empty, swap |
| |
* it with the current group and allocate from there. |
| |
*/ |
| |
pcg = cc->cc_previous; |
| |
if (__predict_true(pcg->pcg_avail > 0)) { |
| |
cc->cc_previous = cc->cc_current; |
| |
cc->cc_current = pcg; |
| |
continue; |
| |
} |
| |
|
| |
/* |
| |
* Can't allocate from either group: try the slow path. |
| |
* If get_slow() allocated an object for us, or if |
| |
* no more objects are available, it will return false. |
| |
* Otherwise, we need to retry. |
| |
*/ |
| |
if (!pool_cache_get_slow(cc, s, &object, pap, flags)) |
| |
break; |
| |
} |
| |
|
| |
return object; |
| |
} |
| |
|
| |
static bool __noinline |
| |
pool_cache_put_slow(pool_cache_cpu_t *cc, int s, void *object) |
| |
{ |
| |
pcg_t *pcg, *cur; |
| |
uint64_t ncsw; |
| |
pool_cache_t pc; |
| |
|
| |
KASSERT(cc->cc_current->pcg_avail == cc->cc_current->pcg_size); |
| |
KASSERT(cc->cc_previous->pcg_avail == cc->cc_previous->pcg_size); |
| |
|
| |
pc = cc->cc_cache; |
| |
cc->cc_misses++; |
| |
|
| |
/* Lock the cache. */ |
| |
if (__predict_false(!mutex_tryenter(&pc->pc_lock))) { |
| |
ncsw = curlwp->l_ncsw; |
| |
mutex_enter(&pc->pc_lock); |
| |
pc->pc_contended++; |
| |
|
| |
/* |
| |
* If we context switched while locking, then our view of |
| |
* the per-CPU data is invalid: retry. |
| |
*/ |
| |
if (__predict_false(curlwp->l_ncsw != ncsw)) { |
| |
mutex_exit(&pc->pc_lock); |
| |
return true; |
| |
} |
| |
} |
| |
|
| |
/* If there are no empty groups in the cache then allocate one. */ |
| |
if (__predict_false((pcg = pc->pc_emptygroups) == NULL)) { |
| |
if (__predict_true(!pool_cache_disable)) { |
| |
pcg = pool_get(pc->pc_pcgpool, PR_NOWAIT); |
| |
} |
| |
if (__predict_true(pcg != NULL)) { |
| |
pcg->pcg_avail = 0; |
| |
pcg->pcg_size = pc->pc_pcgsize; |
| |
} |
| |
} else { |
| |
pc->pc_emptygroups = pcg->pcg_next; |
| |
pc->pc_nempty--; |
| |
} |
| |
|
| |
/* |
| |
* If there's a empty group, release our full group back |
| |
* to the cache. Install the empty group to the local CPU |
| |
* and return. |
| |
*/ |
| |
if (pcg != NULL) { |
| |
KASSERT(pcg->pcg_avail == 0); |
| |
if (__predict_false(cc->cc_previous == &pcg_dummy)) { |
| |
cc->cc_previous = pcg; |
| |
} else { |
| |
cur = cc->cc_current; |
| |
if (__predict_true(cur != &pcg_dummy)) { |
| |
KASSERT(cur->pcg_avail == cur->pcg_size); |
| |
cur->pcg_next = pc->pc_fullgroups; |
| |
pc->pc_fullgroups = cur; |
| |
pc->pc_nfull++; |
| |
} |
| |
cc->cc_current = pcg; |
| |
} |
| |
pc->pc_hits++; |
| |
mutex_exit(&pc->pc_lock); |
| |
return true; |
| |
} |
| |
|
| |
/* |
| |
* Nothing available locally or in cache, and we didn't |
| |
* allocate an empty group. Take the slow path and destroy |
| |
* the object here and now. |
| |
*/ |
| |
pc->pc_misses++; |
| |
mutex_exit(&pc->pc_lock); |
| |
splx(s); |
| |
pool_cache_destruct_object(pc, object); |
| |
|
| |
return false; |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_put{,_paddr}: |
| |
* |
| |
* Put an object back to the pool cache (optionally caching the |
| |
* physical address of the object). |
| |
*/ |
| |
void |
| |
pool_cache_put_paddr(pool_cache_t pc, void *object, paddr_t pa) |
| |
{ |
| |
pool_cache_cpu_t *cc; |
| |
pcg_t *pcg; |
| |
int s; |
| |
|
| |
FREECHECK_IN(&pc->pc_freecheck, object); |
| |
|
| |
/* Lock out interrupts and disable preemption. */ |
| |
s = splvm(); |
| |
while (/* CONSTCOND */ true) { |
| |
/* If the current group isn't full, release it there. */ |
| |
cc = pc->pc_cpus[curcpu()->ci_index]; |
| |
KASSERT(cc->cc_cache == pc); |
| |
pcg = cc->cc_current; |
| |
if (__predict_true(pcg->pcg_avail < pcg->pcg_size)) { |
| |
pcg->pcg_objects[pcg->pcg_avail].pcgo_va = object; |
| |
pcg->pcg_objects[pcg->pcg_avail].pcgo_pa = pa; |
| |
pcg->pcg_avail++; |
| |
cc->cc_hits++; |
| |
splx(s); |
| |
return; |
| |
} |
| |
|
| |
/* |
| |
* That failed. If the previous group isn't full, swap |
| |
* it with the current group and try again. |
| |
*/ |
| |
pcg = cc->cc_previous; |
| |
if (__predict_true(pcg->pcg_avail < pcg->pcg_size)) { |
| |
cc->cc_previous = cc->cc_current; |
| |
cc->cc_current = pcg; |
| |
continue; |
| |
} |
| |
|
| |
/* |
| |
* Can't free to either group: try the slow path. |
| |
* If put_slow() releases the object for us, it |
| |
* will return false. Otherwise we need to retry. |
| |
*/ |
| |
if (!pool_cache_put_slow(cc, s, object)) |
| |
break; |
| |
} |
| |
} |
| |
|
| |
/* |
| |
* pool_cache_xcall: |
| |
* |
| |
* Transfer objects from the per-CPU cache to the global cache. |
| |
* Run within a cross-call thread. |
| |
*/ |
| |
static void |
| |
pool_cache_xcall(pool_cache_t pc) |
| |
{ |
| |
pool_cache_cpu_t *cc; |
| |
pcg_t *prev, *cur, **list; |
| |
int s; |
| |
|
| |
s = splvm(); |
| |
mutex_enter(&pc->pc_lock); |
| |
cc = pc->pc_cpus[curcpu()->ci_index]; |
| |
cur = cc->cc_current; |
| |
cc->cc_current = __UNCONST(&pcg_dummy); |
| |
prev = cc->cc_previous; |
| |
cc->cc_previous = __UNCONST(&pcg_dummy); |
| |
if (cur != &pcg_dummy) { |
| |
if (cur->pcg_avail == cur->pcg_size) { |
| |
list = &pc->pc_fullgroups; |
| |
pc->pc_nfull++; |
| |
} else if (cur->pcg_avail == 0) { |
| |
list = &pc->pc_emptygroups; |
| |
pc->pc_nempty++; |
| |
} else { |
| |
list = &pc->pc_partgroups; |
| |
pc->pc_npart++; |
| |
} |
| |
cur->pcg_next = *list; |
| |
*list = cur; |
| |
} |
| |
if (prev != &pcg_dummy) { |
| |
if (prev->pcg_avail == prev->pcg_size) { |
| |
list = &pc->pc_fullgroups; |
| |
pc->pc_nfull++; |
| |
} else if (prev->pcg_avail == 0) { |
| |
list = &pc->pc_emptygroups; |
| |
pc->pc_nempty++; |
| |
} else { |
| |
list = &pc->pc_partgroups; |
| |
pc->pc_npart++; |
| |
} |
| |
prev->pcg_next = *list; |
| |
*list = prev; |
| |
} |
| |
mutex_exit(&pc->pc_lock); |
| |
splx(s); |
| |
} |
| |
|
| |
/* |
| |
* Pool backend allocators. |
| |
* |
| |
* Each pool has a backend allocator that handles allocation, deallocation, |
| |
* and any additional draining that might be needed. |
| |
* |
| |
* We provide two standard allocators: |
| |
* |
| |
* pool_allocator_kmem - the default when no allocator is specified |
| |
* |
| |
* pool_allocator_nointr - used for pools that will not be accessed |
| |
* in interrupt context. |
| |
*/ |
| |
void *pool_page_alloc(struct pool *, int); |
| |
void pool_page_free(struct pool *, void *); |
| |
|
| |
#ifdef POOL_SUBPAGE |
| |
struct pool_allocator pool_allocator_kmem_fullpage = { |
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pool_page_alloc, pool_page_free, 0, |
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.pa_backingmapptr = &kmem_map, |
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}; |
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#else |
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struct pool_allocator pool_allocator_kmem = { |
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pool_page_alloc, pool_page_free, 0, |
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.pa_backingmapptr = &kmem_map, |
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}; |
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#endif |
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|
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void *pool_page_alloc_nointr(struct pool *, int); |
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void pool_page_free_nointr(struct pool *, void *); |
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|
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#ifdef POOL_SUBPAGE |
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struct pool_allocator pool_allocator_nointr_fullpage = { |
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pool_page_alloc_nointr, pool_page_free_nointr, 0, |
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.pa_backingmapptr = &kernel_map, |
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}; |
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#else |
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struct pool_allocator pool_allocator_nointr = { |
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pool_page_alloc_nointr, pool_page_free_nointr, 0, |
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.pa_backingmapptr = &kernel_map, |
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}; |
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#endif |
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|
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#ifdef POOL_SUBPAGE |
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void *pool_subpage_alloc(struct pool *, int); |
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void pool_subpage_free(struct pool *, void *); |
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|
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struct pool_allocator pool_allocator_kmem = { |
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pool_subpage_alloc, pool_subpage_free, POOL_SUBPAGE, |
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.pa_backingmapptr = &kmem_map, |
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}; |
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|
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void *pool_subpage_alloc_nointr(struct pool *, int); |
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void pool_subpage_free_nointr(struct pool *, void *); |
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|
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struct pool_allocator pool_allocator_nointr = { |
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pool_subpage_alloc, pool_subpage_free, POOL_SUBPAGE, |
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.pa_backingmapptr = &kmem_map, |
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}; |
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#endif /* POOL_SUBPAGE */ |
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|
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static void * |
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pool_allocator_alloc(struct pool *pp, int flags) |
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{ |
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struct pool_allocator *pa = pp->pr_alloc; |
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void *res; |
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|
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res = (*pa->pa_alloc)(pp, flags); |
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if (res == NULL && (flags & PR_WAITOK) == 0) { |
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/* |
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* We only run the drain hook here if PR_NOWAIT. |
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* In other cases, the hook will be run in |
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* pool_reclaim(). |
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*/ |
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if (pp->pr_drain_hook != NULL) { |
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(*pp->pr_drain_hook)(pp->pr_drain_hook_arg, flags); |
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res = (*pa->pa_alloc)(pp, flags); |
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} |
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} |
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return res; |
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} |
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|
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static void |
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pool_allocator_free(struct pool *pp, void *v) |
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{ |
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struct pool_allocator *pa = pp->pr_alloc; |
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|
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(*pa->pa_free)(pp, v); |
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} |
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|
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void * |
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pool_page_alloc(struct pool *pp, int flags) |
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{ |
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bool waitok = (flags & PR_WAITOK) ? true : false; |
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|
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return ((void *) uvm_km_alloc_poolpage_cache(kmem_map, waitok)); |
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} |
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|
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void |
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pool_page_free(struct pool *pp, void *v) |
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{ |
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|
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uvm_km_free_poolpage_cache(kmem_map, (vaddr_t) v); |
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} |
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|
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static void * |
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pool_page_alloc_meta(struct pool *pp, int flags) |
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{ |
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bool waitok = (flags & PR_WAITOK) ? true : false; |
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|
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return ((void *) uvm_km_alloc_poolpage(kmem_map, waitok)); |
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} |
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|
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static void |
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pool_page_free_meta(struct pool *pp, void *v) |
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{ |
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|
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uvm_km_free_poolpage(kmem_map, (vaddr_t) v); |
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} |
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|
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#ifdef POOL_SUBPAGE |
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/* Sub-page allocator, for machines with large hardware pages. */ |
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void * |
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pool_subpage_alloc(struct pool *pp, int flags) |
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{ |
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return pool_get(&psppool, flags); |
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} |
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|
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void |
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pool_subpage_free(struct pool *pp, void *v) |
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{ |
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pool_put(&psppool, v); |
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} |
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|
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/* We don't provide a real nointr allocator. Maybe later. */ |
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void * |
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pool_subpage_alloc_nointr(struct pool *pp, int flags) |
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{ |
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|
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return (pool_subpage_alloc(pp, flags)); |
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} |
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|
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void |
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pool_subpage_free_nointr(struct pool *pp, void *v) |
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{ |
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|
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pool_subpage_free(pp, v); |
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} |
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#endif /* POOL_SUBPAGE */ |
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void * |
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pool_page_alloc_nointr(struct pool *pp, int flags) |
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{ |
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bool waitok = (flags & PR_WAITOK) ? true : false; |
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|
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return ((void *) uvm_km_alloc_poolpage_cache(kernel_map, waitok)); |
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} |
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|
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void |
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pool_page_free_nointr(struct pool *pp, void *v) |
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{ |
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|
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uvm_km_free_poolpage_cache(kernel_map, (vaddr_t) v); |
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} |
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|
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#if defined(DDB) |
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static bool |
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pool_in_page(struct pool *pp, struct pool_item_header *ph, uintptr_t addr) |
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{ |
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|
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return (uintptr_t)ph->ph_page <= addr && |
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addr < (uintptr_t)ph->ph_page + pp->pr_alloc->pa_pagesz; |
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} |
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|
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static bool |
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pool_in_item(struct pool *pp, void *item, uintptr_t addr) |
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{ |
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|
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return (uintptr_t)item <= addr && addr < (uintptr_t)item + pp->pr_size; |
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} |
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|
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static bool |
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pool_in_cg(struct pool *pp, struct pool_cache_group *pcg, uintptr_t addr) |
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{ |
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int i; |
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|
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if (pcg == NULL) { |
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return false; |
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} |
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for (i = 0; i < pcg->pcg_avail; i++) { |
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if (pool_in_item(pp, pcg->pcg_objects[i].pcgo_va, addr)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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|
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static bool |
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pool_allocated(struct pool *pp, struct pool_item_header *ph, uintptr_t addr) |
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{ |
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|
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if ((pp->pr_roflags & PR_NOTOUCH) != 0) { |
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unsigned int idx = pr_item_notouch_index(pp, ph, (void *)addr); |
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pool_item_bitmap_t *bitmap = |
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ph->ph_bitmap + (idx / BITMAP_SIZE); |
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pool_item_bitmap_t mask = 1 << (idx & BITMAP_MASK); |
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|
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return (*bitmap & mask) == 0; |
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} else { |
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struct pool_item *pi; |
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|
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LIST_FOREACH(pi, &ph->ph_itemlist, pi_list) { |
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if (pool_in_item(pp, pi, addr)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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} |
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|
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void |
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pool_whatis(uintptr_t addr, void (*pr)(const char *, ...)) |
| |
{ |
| |
struct pool *pp; |
| |
|
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TAILQ_FOREACH(pp, &pool_head, pr_poollist) { |
| |
struct pool_item_header *ph; |
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uintptr_t item; |
| |
bool allocated = true; |
| |
bool incache = false; |
| |
bool incpucache = false; |
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char cpucachestr[32]; |
| |
|
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if ((pp->pr_roflags & PR_PHINPAGE) != 0) { |
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LIST_FOREACH(ph, &pp->pr_fullpages, ph_pagelist) { |
| |
if (pool_in_page(pp, ph, addr)) { |
| |
goto found; |
| |
} |
| |
} |
| |
LIST_FOREACH(ph, &pp->pr_partpages, ph_pagelist) { |
| |
if (pool_in_page(pp, ph, addr)) { |
| |
allocated = |
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pool_allocated(pp, ph, addr); |
| |
goto found; |
| |
} |
| |
} |
| |
LIST_FOREACH(ph, &pp->pr_emptypages, ph_pagelist) { |
| |
if (pool_in_page(pp, ph, addr)) { |
| |
allocated = false; |
| |
goto found; |
| |
} |
| |
} |
| |
continue; |
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} else { |
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ph = pr_find_pagehead_noalign(pp, (void *)addr); |
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if (ph == NULL || !pool_in_page(pp, ph, addr)) { |
| |
continue; |
| |
} |
| |
allocated = pool_allocated(pp, ph, addr); |
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} |
| |
found: |
| |
if (allocated && pp->pr_cache) { |
| |
pool_cache_t pc = pp->pr_cache; |
| |
struct pool_cache_group *pcg; |
| |
int i; |
| |
|
| |
for (pcg = pc->pc_fullgroups; pcg != NULL; |
| |
pcg = pcg->pcg_next) { |
| |
if (pool_in_cg(pp, pcg, addr)) { |
| |
incache = true; |
| |
goto print; |
| |
} |
| |
} |
| |
for (i = 0; i < MAXCPUS; i++) { |
| |
pool_cache_cpu_t *cc; |
| |
|
| |
if ((cc = pc->pc_cpus[i]) == NULL) { |
| |
continue; |
| |
} |
| |
if (pool_in_cg(pp, cc->cc_current, addr) || |
| |
pool_in_cg(pp, cc->cc_previous, addr)) { |
| |
struct cpu_info *ci = |
| |
cpu_lookup(i); |
| |
|
| |
incpucache = true; |
| |
snprintf(cpucachestr, |
| |
sizeof(cpucachestr), |
| |
"cached by CPU %u", |
| |
ci->ci_index); |
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goto print; |
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} |
| |
} |
| |
} |
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print: |
| |
item = (uintptr_t)ph->ph_page + ph->ph_off; |
| |
item = item + rounddown(addr - item, pp->pr_size); |
| |
(*pr)("%p is %p+%zu in POOL '%s' (%s)\n", |
| |
(void *)addr, item, (size_t)(addr - item), |
| |
pp->pr_wchan, |
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incpucache ? cpucachestr : |
| |
incache ? "cached" : allocated ? "allocated" : "free"); |
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} |
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} |
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#endif /* defined(DDB) */ |