version 1.99, 2005/01/01 21:09:56 |
version 1.166, 2008/07/09 02:43:53 |
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/* $NetBSD$ */ |
/* $NetBSD$ */ |
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/*- |
/*- |
* Copyright (c) 1997, 1999, 2000 The NetBSD Foundation, Inc. |
* Copyright (c) 1997, 1999, 2000, 2002, 2007, 2008 The NetBSD Foundation, Inc. |
* All rights reserved. |
* All rights reserved. |
* |
* |
* This code is derived from software contributed to The NetBSD Foundation |
* This code is derived from software contributed to The NetBSD Foundation |
* by Paul Kranenburg; by Jason R. Thorpe of the Numerical Aerospace |
* by Paul Kranenburg; by Jason R. Thorpe of the Numerical Aerospace |
* Simulation Facility, NASA Ames Research Center. |
* Simulation Facility, NASA Ames Research Center, and by Andrew Doran. |
* |
* |
* Redistribution and use in source and binary forms, with or without |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* modification, are permitted provided that the following conditions |
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* 2. Redistributions in binary form must reproduce the above copyright |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* documentation and/or other materials provided with the distribution. |
* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* This product includes software developed by the NetBSD |
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* Foundation, Inc. and its contributors. |
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* 4. Neither the name of The NetBSD Foundation nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
* |
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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#include <sys/cdefs.h> |
#include <sys/cdefs.h> |
__KERNEL_RCSID(0, "$NetBSD$"); |
__KERNEL_RCSID(0, "$NetBSD$"); |
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#include "opt_ddb.h" |
#include "opt_pool.h" |
#include "opt_pool.h" |
#include "opt_poollog.h" |
#include "opt_poollog.h" |
#include "opt_lockdebug.h" |
#include "opt_lockdebug.h" |
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#include <sys/param.h> |
#include <sys/param.h> |
#include <sys/systm.h> |
#include <sys/systm.h> |
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#include <sys/bitops.h> |
#include <sys/proc.h> |
#include <sys/proc.h> |
#include <sys/errno.h> |
#include <sys/errno.h> |
#include <sys/kernel.h> |
#include <sys/kernel.h> |
#include <sys/malloc.h> |
#include <sys/malloc.h> |
#include <sys/lock.h> |
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#include <sys/pool.h> |
#include <sys/pool.h> |
#include <sys/syslog.h> |
#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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#include <uvm/uvm.h> |
#include <uvm/uvm.h> |
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Line 75 TAILQ_HEAD(,pool) pool_head = TAILQ_HEAD |
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Line 74 TAILQ_HEAD(,pool) pool_head = TAILQ_HEAD |
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/* Private pool for page header structures */ |
/* Private pool for page header structures */ |
#define PHPOOL_MAX 8 |
#define PHPOOL_MAX 8 |
static struct pool phpool[PHPOOL_MAX]; |
static struct pool phpool[PHPOOL_MAX]; |
#define PHPOOL_FREELIST_NELEM(idx) (((idx) == 0) ? 0 : (1 << (idx))) |
#define PHPOOL_FREELIST_NELEM(idx) \ |
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(((idx) == 0) ? 0 : BITMAP_SIZE * (1 << (idx))) |
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#ifdef POOL_SUBPAGE |
#ifdef POOL_SUBPAGE |
/* Pool of subpages for use by normal pools. */ |
/* Pool of subpages for use by normal pools. */ |
static struct pool psppool; |
static struct pool psppool; |
#endif |
#endif |
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static SLIST_HEAD(, pool_allocator) pa_deferinitq = |
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SLIST_HEAD_INITIALIZER(pa_deferinitq); |
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static void *pool_page_alloc_meta(struct pool *, int); |
static void *pool_page_alloc_meta(struct pool *, int); |
static void pool_page_free_meta(struct pool *, void *); |
static void pool_page_free_meta(struct pool *, void *); |
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/* allocator for pool metadata */ |
/* allocator for pool metadata */ |
static struct pool_allocator pool_allocator_meta = { |
struct pool_allocator pool_allocator_meta = { |
pool_page_alloc_meta, pool_page_free_meta |
pool_page_alloc_meta, pool_page_free_meta, |
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.pa_backingmapptr = &kmem_map, |
}; |
}; |
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/* # of seconds to retain page after last use */ |
/* # of seconds to retain page after last use */ |
Line 96 int pool_inactive_time = 10; |
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Line 100 int pool_inactive_time = 10; |
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/* Next candidate for drainage (see pool_drain()) */ |
/* Next candidate for drainage (see pool_drain()) */ |
static struct pool *drainpp; |
static struct pool *drainpp; |
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/* This spin lock protects both pool_head and drainpp. */ |
/* This lock protects both pool_head and drainpp. */ |
struct simplelock pool_head_slock = SIMPLELOCK_INITIALIZER; |
static kmutex_t pool_head_lock; |
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static kcondvar_t pool_busy; |
typedef uint8_t pool_item_freelist_t; |
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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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struct pool_item_header { |
struct pool_item_header { |
/* Page headers */ |
/* Page headers */ |
Line 107 struct pool_item_header { |
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Line 114 struct pool_item_header { |
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ph_pagelist; /* pool page list */ |
ph_pagelist; /* pool page list */ |
SPLAY_ENTRY(pool_item_header) |
SPLAY_ENTRY(pool_item_header) |
ph_node; /* Off-page page headers */ |
ph_node; /* Off-page page headers */ |
caddr_t ph_page; /* this page's address */ |
void * ph_page; /* this page's address */ |
struct timeval ph_time; /* last referenced */ |
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 */ |
union { |
union { |
/* !PR_NOTOUCH */ |
/* !PR_NOTOUCH */ |
struct { |
struct { |
TAILQ_HEAD(, pool_item) |
LIST_HEAD(, pool_item) |
phu_itemlist; /* chunk list for this page */ |
phu_itemlist; /* chunk list for this page */ |
} phu_normal; |
} phu_normal; |
/* PR_NOTOUCH */ |
/* PR_NOTOUCH */ |
struct { |
struct { |
uint16_t |
pool_item_bitmap_t phu_bitmap[1]; |
phu_off; /* start offset in page */ |
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pool_item_freelist_t |
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phu_firstfree; /* first free item */ |
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/* |
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* XXX it might be better to use |
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* a simple bitmap and ffs(3) |
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*/ |
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} phu_notouch; |
} phu_notouch; |
} ph_u; |
} ph_u; |
uint16_t ph_nmissing; /* # of chunks in use */ |
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}; |
}; |
#define ph_itemlist ph_u.phu_normal.phu_itemlist |
#define ph_itemlist ph_u.phu_normal.phu_itemlist |
#define ph_off ph_u.phu_notouch.phu_off |
#define ph_bitmap ph_u.phu_notouch.phu_bitmap |
#define ph_firstfree ph_u.phu_notouch.phu_firstfree |
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struct pool_item { |
struct pool_item { |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
u_int pi_magic; |
u_int pi_magic; |
#endif |
#endif |
#define PI_MAGIC 0xdeadbeefU |
#define PI_MAGIC 0xdeaddeadU |
/* Other entries use only this list entry */ |
/* Other entries use only this list entry */ |
TAILQ_ENTRY(pool_item) pi_list; |
LIST_ENTRY(pool_item) pi_list; |
}; |
}; |
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#define POOL_NEEDS_CATCHUP(pp) \ |
#define POOL_NEEDS_CATCHUP(pp) \ |
Line 153 struct pool_item { |
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Line 153 struct pool_item { |
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* needless object construction/destruction; it is deferred until absolutely |
* needless object construction/destruction; it is deferred until absolutely |
* necessary. |
* necessary. |
* |
* |
* Caches are grouped into cache groups. Each cache group references |
* Caches are grouped into cache groups. Each cache group references up |
* up to 16 constructed objects. When a cache allocates an object |
* to PCG_NUMOBJECTS constructed objects. When a cache allocates an |
* from the pool, it calls the object's constructor and places it into |
* object from the pool, it calls the object's constructor and places it |
* a cache group. When a cache group frees an object back to the pool, |
* into a cache group. When a cache group frees an object back to the |
* it first calls the object's destructor. This allows the object to |
* pool, it first calls the object's destructor. This allows the object |
* persist in constructed form while freed to the cache. |
* to persist in constructed form while freed to the cache. |
* |
* |
* Multiple caches may exist for each pool. This allows a single |
* The pool references each cache, so that when a pool is drained by the |
* object type to have multiple constructed forms. The pool references |
* pagedaemon, it can drain each individual cache as well. Each time a |
* each cache, so that when a pool is drained by the pagedaemon, it can |
* cache is drained, the most idle cache group is freed to the pool in |
* drain each individual cache as well. Each time a cache is drained, |
* its entirety. |
* the most idle cache group is freed to the pool in its entirety. |
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* |
* |
* Pool caches are layed on top of pools. By layering them, we can avoid |
* Pool caches are layed on top of pools. By layering them, we can avoid |
* the complexity of cache management for pools which would not benefit |
* the complexity of cache management for pools which would not benefit |
* from it. |
* from it. |
*/ |
*/ |
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/* The cache group pool. */ |
static struct pool pcg_normal_pool; |
static struct pool pcgpool; |
static struct pool pcg_large_pool; |
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static struct pool cache_pool; |
static void pool_cache_reclaim(struct pool_cache *); |
static struct pool cache_cpu_pool; |
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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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int pool_cache_disable; /* global disable for caching */ |
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static pcg_t pcg_dummy; /* zero sized: always empty, yet always full */ |
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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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static int pool_catchup(struct pool *); |
static int pool_catchup(struct pool *); |
static void pool_prime_page(struct pool *, caddr_t, |
static void pool_prime_page(struct pool *, void *, |
struct pool_item_header *); |
struct pool_item_header *); |
static void pool_update_curpage(struct pool *); |
static void pool_update_curpage(struct pool *); |
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void *pool_allocator_alloc(struct pool *, int); |
static int pool_grow(struct pool *, int); |
void pool_allocator_free(struct pool *, void *); |
static void *pool_allocator_alloc(struct pool *, int); |
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static void pool_allocator_free(struct pool *, void *); |
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static void pool_print_pagelist(struct pool *, struct pool_pagelist *, |
static void pool_print_pagelist(struct pool *, struct pool_pagelist *, |
void (*)(const char *, ...)); |
void (*)(const char *, ...)); |
Line 212 struct pool_log { |
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Line 227 struct pool_log { |
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int pool_logsize = POOL_LOGSIZE; |
int pool_logsize = POOL_LOGSIZE; |
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static __inline void |
static inline void |
pr_log(struct pool *pp, void *v, int action, const char *file, long line) |
pr_log(struct pool *pp, void *v, int action, const char *file, long line) |
{ |
{ |
int n = pp->pr_curlogentry; |
int n = pp->pr_curlogentry; |
Line 265 pr_printlog(struct pool *pp, struct pool |
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Line 280 pr_printlog(struct pool *pp, struct pool |
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} |
} |
} |
} |
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static __inline void |
static inline void |
pr_enter(struct pool *pp, const char *file, long line) |
pr_enter(struct pool *pp, const char *file, long line) |
{ |
{ |
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Line 281 pr_enter(struct pool *pp, const char *fi |
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Line 296 pr_enter(struct pool *pp, const char *fi |
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pp->pr_entered_line = line; |
pp->pr_entered_line = line; |
} |
} |
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static __inline void |
static inline void |
pr_leave(struct pool *pp) |
pr_leave(struct pool *pp) |
{ |
{ |
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Line 294 pr_leave(struct pool *pp) |
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Line 309 pr_leave(struct pool *pp) |
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pp->pr_entered_line = 0; |
pp->pr_entered_line = 0; |
} |
} |
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static __inline void |
static inline void |
pr_enter_check(struct pool *pp, void (*pr)(const char *, ...)) |
pr_enter_check(struct pool *pp, void (*pr)(const char *, ...)) |
{ |
{ |
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Line 310 pr_enter_check(struct pool *pp, void (*p |
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Line 325 pr_enter_check(struct pool *pp, void (*p |
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#define pr_enter_check(pp, pr) |
#define pr_enter_check(pp, pr) |
#endif /* POOL_DIAGNOSTIC */ |
#endif /* POOL_DIAGNOSTIC */ |
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static __inline int |
static inline unsigned int |
pr_item_notouch_index(const struct pool *pp, const struct pool_item_header *ph, |
pr_item_notouch_index(const struct pool *pp, const struct pool_item_header *ph, |
const void *v) |
const void *v) |
{ |
{ |
const char *cp = v; |
const char *cp = v; |
int idx; |
unsigned int idx; |
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KASSERT(pp->pr_roflags & PR_NOTOUCH); |
KASSERT(pp->pr_roflags & PR_NOTOUCH); |
idx = (cp - ph->ph_page - ph->ph_off) / pp->pr_size; |
idx = (cp - (char *)ph->ph_page - ph->ph_off) / pp->pr_size; |
KASSERT(idx < pp->pr_itemsperpage); |
KASSERT(idx < pp->pr_itemsperpage); |
return idx; |
return idx; |
} |
} |
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#define PR_FREELIST_ALIGN(p) \ |
static inline void |
roundup((uintptr_t)(p), sizeof(pool_item_freelist_t)) |
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#define PR_FREELIST(ph) ((pool_item_freelist_t *)PR_FREELIST_ALIGN((ph) + 1)) |
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#define PR_INDEX_USED ((pool_item_freelist_t)-1) |
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#define PR_INDEX_EOL ((pool_item_freelist_t)-2) |
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static __inline void |
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pr_item_notouch_put(const struct pool *pp, struct pool_item_header *ph, |
pr_item_notouch_put(const struct pool *pp, struct pool_item_header *ph, |
void *obj) |
void *obj) |
{ |
{ |
int idx = pr_item_notouch_index(pp, ph, obj); |
unsigned int idx = pr_item_notouch_index(pp, ph, obj); |
pool_item_freelist_t *freelist = PR_FREELIST(ph); |
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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KASSERT(freelist[idx] == PR_INDEX_USED); |
KASSERT((*bitmap & mask) == 0); |
freelist[idx] = ph->ph_firstfree; |
*bitmap |= mask; |
ph->ph_firstfree = idx; |
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} |
} |
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static __inline void * |
static inline void * |
pr_item_notouch_get(const struct pool *pp, struct pool_item_header *ph) |
pr_item_notouch_get(const struct pool *pp, struct pool_item_header *ph) |
{ |
{ |
int idx = ph->ph_firstfree; |
pool_item_bitmap_t *bitmap = ph->ph_bitmap; |
pool_item_freelist_t *freelist = PR_FREELIST(ph); |
unsigned int idx; |
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int i; |
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for (i = 0; ; i++) { |
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int bit; |
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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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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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KASSERT(freelist[idx] != PR_INDEX_USED); |
static inline void |
ph->ph_firstfree = freelist[idx]; |
pr_item_notouch_init(const struct pool *pp, struct pool_item_header *ph) |
freelist[idx] = PR_INDEX_USED; |
{ |
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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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return ph->ph_page + ph->ph_off + idx * pp->pr_size; |
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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static __inline int |
static inline int |
phtree_compare(struct pool_item_header *a, struct pool_item_header *b) |
phtree_compare(struct pool_item_header *a, struct pool_item_header *b) |
{ |
{ |
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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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if (a->ph_page < b->ph_page) |
if (a->ph_page < b->ph_page) |
return (-1); |
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else if (a->ph_page > b->ph_page) |
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return (1); |
return (1); |
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else if (a->ph_page > b->ph_page) |
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return (-1); |
else |
else |
return (0); |
return (0); |
} |
} |
Line 368 phtree_compare(struct pool_item_header * |
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Line 409 phtree_compare(struct pool_item_header * |
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SPLAY_PROTOTYPE(phtree, pool_item_header, ph_node, phtree_compare); |
SPLAY_PROTOTYPE(phtree, pool_item_header, ph_node, phtree_compare); |
SPLAY_GENERATE(phtree, pool_item_header, ph_node, phtree_compare); |
SPLAY_GENERATE(phtree, pool_item_header, ph_node, phtree_compare); |
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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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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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return ph; |
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} |
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/* |
/* |
* Return the pool page header based on page address. |
* Return the pool page header based on item address. |
*/ |
*/ |
static __inline struct pool_item_header * |
static inline struct pool_item_header * |
pr_find_pagehead(struct pool *pp, caddr_t page) |
pr_find_pagehead(struct pool *pp, void *v) |
{ |
{ |
struct pool_item_header *ph, tmp; |
struct pool_item_header *ph, tmp; |
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if ((pp->pr_roflags & PR_PHINPAGE) != 0) |
if ((pp->pr_roflags & PR_NOALIGN) != 0) { |
return ((struct pool_item_header *)(page + pp->pr_phoffset)); |
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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tmp.ph_page = page; |
if ((pp->pr_roflags & PR_PHINPAGE) != 0) { |
ph = SPLAY_FIND(phtree, &pp->pr_phtree, &tmp); |
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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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)); |
return ph; |
return ph; |
} |
} |
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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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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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/* |
/* |
* Remove a page from the pool. |
* Remove a page from the pool. |
*/ |
*/ |
static __inline void |
static inline void |
pr_rmpage(struct pool *pp, struct pool_item_header *ph, |
pr_rmpage(struct pool *pp, struct pool_item_header *ph, |
struct pool_pagelist *pq) |
struct pool_pagelist *pq) |
{ |
{ |
int s; |
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LOCK_ASSERT(!simple_lock_held(&pp->pr_slock) || pq != NULL); |
KASSERT(mutex_owned(&pp->pr_lock)); |
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/* |
/* |
* If the page was idle, decrement the idle page count. |
* If the page was idle, decrement the idle page count. |
Line 411 pr_rmpage(struct pool *pp, struct pool_i |
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Line 494 pr_rmpage(struct pool *pp, struct pool_i |
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pp->pr_nitems -= pp->pr_itemsperpage; |
pp->pr_nitems -= pp->pr_itemsperpage; |
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/* |
/* |
* Unlink a page from the pool and release it (or queue it for release). |
* Unlink the page from the pool and queue it for release. |
*/ |
*/ |
LIST_REMOVE(ph, ph_pagelist); |
LIST_REMOVE(ph, ph_pagelist); |
if ((pp->pr_roflags & PR_PHINPAGE) == 0) |
if ((pp->pr_roflags & PR_PHINPAGE) == 0) |
SPLAY_REMOVE(phtree, &pp->pr_phtree, ph); |
SPLAY_REMOVE(phtree, &pp->pr_phtree, ph); |
if (pq) { |
LIST_INSERT_HEAD(pq, ph, ph_pagelist); |
LIST_INSERT_HEAD(pq, ph, ph_pagelist); |
|
} else { |
|
pool_allocator_free(pp, ph->ph_page); |
|
if ((pp->pr_roflags & PR_PHINPAGE) == 0) { |
|
s = splvm(); |
|
pool_put(pp->pr_phpool, ph); |
|
splx(s); |
|
} |
|
} |
|
pp->pr_npages--; |
pp->pr_npages--; |
pp->pr_npagefree++; |
pp->pr_npagefree++; |
|
|
pool_update_curpage(pp); |
pool_update_curpage(pp); |
} |
} |
|
|
|
static bool |
|
pa_starved_p(struct pool_allocator *pa) |
|
{ |
|
|
|
if (pa->pa_backingmap != NULL) { |
|
return vm_map_starved_p(pa->pa_backingmap); |
|
} |
|
return false; |
|
} |
|
|
|
static int |
|
pool_reclaim_callback(struct callback_entry *ce, void *obj, void *arg) |
|
{ |
|
struct pool *pp = obj; |
|
struct pool_allocator *pa = pp->pr_alloc; |
|
|
|
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. |
* Initialize all the pools listed in the "pools" link set. |
*/ |
*/ |
void |
void |
link_pool_init(void) |
pool_subsystem_init(void) |
{ |
{ |
|
struct pool_allocator *pa; |
__link_set_decl(pools, struct link_pool_init); |
__link_set_decl(pools, struct link_pool_init); |
struct link_pool_init * const *pi; |
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) |
__link_set_foreach(pi, pools) |
pool_init((*pi)->pp, (*pi)->size, (*pi)->align, |
pool_init((*pi)->pp, (*pi)->size, (*pi)->align, |
(*pi)->align_offset, (*pi)->flags, (*pi)->wchan, |
(*pi)->align_offset, (*pi)->flags, (*pi)->wchan, |
(*pi)->palloc); |
(*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); |
} |
} |
|
|
/* |
/* |
Line 455 link_pool_init(void) |
|
Line 620 link_pool_init(void) |
|
*/ |
*/ |
void |
void |
pool_init(struct pool *pp, size_t size, u_int align, u_int ioff, int flags, |
pool_init(struct pool *pp, size_t size, u_int align, u_int ioff, int flags, |
const char *wchan, struct pool_allocator *palloc) |
const char *wchan, struct pool_allocator *palloc, int ipl) |
{ |
{ |
int off, slack; |
struct pool *pp1; |
size_t trysize, phsize; |
size_t trysize, phsize; |
int s; |
int off, slack; |
|
|
KASSERT((1UL << (CHAR_BIT * sizeof(pool_item_freelist_t))) - 2 >= |
#ifdef DEBUG |
PHPOOL_FREELIST_NELEM(PHPOOL_MAX - 1)); |
/* |
|
* 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 |
#ifdef POOL_DIAGNOSTIC |
/* |
/* |
Line 472 pool_init(struct pool *pp, size_t size, |
|
Line 646 pool_init(struct pool *pp, size_t size, |
|
flags |= PR_LOGGING; |
flags |= PR_LOGGING; |
#endif |
#endif |
|
|
#ifdef POOL_SUBPAGE |
|
/* |
|
* XXX We don't provide a real `nointr' back-end |
|
* yet; all sub-pages come from a kmem back-end. |
|
* maybe some day... |
|
*/ |
|
if (palloc == NULL) { |
|
extern struct pool_allocator pool_allocator_kmem_subpage; |
|
palloc = &pool_allocator_kmem_subpage; |
|
} |
|
/* |
|
* We'll assume any user-specified back-end allocator |
|
* will deal with sub-pages, or simply don't care. |
|
*/ |
|
#else |
|
if (palloc == NULL) |
if (palloc == NULL) |
palloc = &pool_allocator_kmem; |
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 */ |
#endif /* POOL_SUBPAGE */ |
if ((palloc->pa_flags & PA_INITIALIZED) == 0) { |
if ((palloc->pa_flags & PA_INITIALIZED) == 0) { |
if (palloc->pa_pagesz == 0) { |
if (palloc->pa_pagesz == 0) |
#ifdef POOL_SUBPAGE |
|
if (palloc == &pool_allocator_kmem) |
|
palloc->pa_pagesz = PAGE_SIZE; |
|
else |
|
palloc->pa_pagesz = POOL_SUBPAGE; |
|
#else |
|
palloc->pa_pagesz = PAGE_SIZE; |
palloc->pa_pagesz = PAGE_SIZE; |
#endif /* POOL_SUBPAGE */ |
|
} |
|
|
|
TAILQ_INIT(&palloc->pa_list); |
TAILQ_INIT(&palloc->pa_list); |
|
|
simple_lock_init(&palloc->pa_slock); |
mutex_init(&palloc->pa_lock, MUTEX_DEFAULT, IPL_VM); |
palloc->pa_pagemask = ~(palloc->pa_pagesz - 1); |
palloc->pa_pagemask = ~(palloc->pa_pagesz - 1); |
palloc->pa_pageshift = ffs(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; |
palloc->pa_flags |= PA_INITIALIZED; |
} |
} |
|
|
if (align == 0) |
if (align == 0) |
align = ALIGN(1); |
align = ALIGN(1); |
|
|
if (size < sizeof(struct pool_item)) |
if ((flags & PR_NOTOUCH) == 0 && size < sizeof(struct pool_item)) |
size = sizeof(struct pool_item); |
size = sizeof(struct pool_item); |
|
|
size = roundup(size, align); |
size = roundup(size, align); |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (size > palloc->pa_pagesz) |
if (size > palloc->pa_pagesz) |
panic("pool_init: pool item size (%lu) too large", |
panic("pool_init: pool item size (%zu) too large", size); |
(u_long)size); |
|
#endif |
#endif |
|
|
/* |
/* |
Line 529 pool_init(struct pool *pp, size_t size, |
|
Line 690 pool_init(struct pool *pp, size_t size, |
|
LIST_INIT(&pp->pr_emptypages); |
LIST_INIT(&pp->pr_emptypages); |
LIST_INIT(&pp->pr_fullpages); |
LIST_INIT(&pp->pr_fullpages); |
LIST_INIT(&pp->pr_partpages); |
LIST_INIT(&pp->pr_partpages); |
TAILQ_INIT(&pp->pr_cachelist); |
pp->pr_cache = NULL; |
pp->pr_curpage = NULL; |
pp->pr_curpage = NULL; |
pp->pr_npages = 0; |
pp->pr_npages = 0; |
pp->pr_minitems = 0; |
pp->pr_minitems = 0; |
Line 551 pool_init(struct pool *pp, size_t size, |
|
Line 712 pool_init(struct pool *pp, size_t size, |
|
pp->pr_hardlimit_warning_last.tv_usec = 0; |
pp->pr_hardlimit_warning_last.tv_usec = 0; |
pp->pr_drain_hook = NULL; |
pp->pr_drain_hook = NULL; |
pp->pr_drain_hook_arg = NULL; |
pp->pr_drain_hook_arg = NULL; |
|
pp->pr_freecheck = NULL; |
|
|
/* |
/* |
* Decide whether to put the page header off page to avoid |
* Decide whether to put the page header off page to avoid |
Line 569 pool_init(struct pool *pp, size_t size, |
|
Line 731 pool_init(struct pool *pp, size_t size, |
|
/* See the comment below about reserved bytes. */ |
/* See the comment below about reserved bytes. */ |
trysize = palloc->pa_pagesz - ((align - ioff) % align); |
trysize = palloc->pa_pagesz - ((align - ioff) % align); |
phsize = ALIGN(sizeof(struct pool_item_header)); |
phsize = ALIGN(sizeof(struct pool_item_header)); |
if ((pp->pr_roflags & PR_NOTOUCH) == 0 && |
if ((pp->pr_roflags & (PR_NOTOUCH | PR_NOALIGN)) == 0 && |
(pp->pr_size < MIN(palloc->pa_pagesz / 16, phsize << 3) || |
(pp->pr_size < MIN(palloc->pa_pagesz / 16, phsize << 3) || |
trysize / pp->pr_size == (trysize - phsize) / pp->pr_size)) { |
trysize / pp->pr_size == (trysize - phsize) / pp->pr_size)) { |
/* Use the end of the page for the page header */ |
/* Use the end of the page for the page header */ |
Line 629 pool_init(struct pool *pp, size_t size, |
|
Line 791 pool_init(struct pool *pp, size_t size, |
|
pp->pr_npagefree = 0; |
pp->pr_npagefree = 0; |
pp->pr_hiwat = 0; |
pp->pr_hiwat = 0; |
pp->pr_nidle = 0; |
pp->pr_nidle = 0; |
|
pp->pr_refcnt = 0; |
|
|
#ifdef POOL_DIAGNOSTIC |
#ifdef POOL_DIAGNOSTIC |
if (flags & PR_LOGGING) { |
if (flags & PR_LOGGING) { |
Line 644 pool_init(struct pool *pp, size_t size, |
|
Line 807 pool_init(struct pool *pp, size_t size, |
|
pp->pr_entered_file = NULL; |
pp->pr_entered_file = NULL; |
pp->pr_entered_line = 0; |
pp->pr_entered_line = 0; |
|
|
simple_lock_init(&pp->pr_slock); |
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 |
* Initialize private page header pool and cache magazine pool if we |
Line 663 pool_init(struct pool *pp, size_t size, |
|
Line 828 pool_init(struct pool *pp, size_t size, |
|
"phpool-%d", nelem); |
"phpool-%d", nelem); |
sz = sizeof(struct pool_item_header); |
sz = sizeof(struct pool_item_header); |
if (nelem) { |
if (nelem) { |
sz = PR_FREELIST_ALIGN(sz) |
sz = offsetof(struct pool_item_header, |
+ nelem * sizeof(pool_item_freelist_t); |
ph_bitmap[howmany(nelem, BITMAP_SIZE)]); |
} |
} |
pool_init(&phpool[idx], sz, 0, 0, 0, |
pool_init(&phpool[idx], sz, 0, 0, 0, |
phpool_names[idx], &pool_allocator_meta); |
phpool_names[idx], &pool_allocator_meta, IPL_VM); |
} |
} |
#ifdef POOL_SUBPAGE |
#ifdef POOL_SUBPAGE |
pool_init(&psppool, POOL_SUBPAGE, POOL_SUBPAGE, 0, |
pool_init(&psppool, POOL_SUBPAGE, POOL_SUBPAGE, 0, |
PR_RECURSIVE, "psppool", &pool_allocator_meta); |
PR_RECURSIVE, "psppool", &pool_allocator_meta, IPL_VM); |
#endif |
#endif |
pool_init(&pcgpool, sizeof(struct pool_cache_group), 0, 0, |
|
0, "pcgpool", &pool_allocator_meta); |
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. */ |
/* Insert into the list of all pools. */ |
simple_lock(&pool_head_slock); |
if (__predict_true(!cold)) |
TAILQ_INSERT_TAIL(&pool_head, pp, pr_poollist); |
mutex_enter(&pool_head_lock); |
simple_unlock(&pool_head_slock); |
TAILQ_FOREACH(pp1, &pool_head, pr_poollist) { |
|
if (strcmp(pp1->pr_wchan, pp->pr_wchan) > 0) |
/* Insert this into the list of pools using this allocator. */ |
break; |
s = splvm(); |
} |
simple_lock(&palloc->pa_slock); |
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); |
TAILQ_INSERT_TAIL(&palloc->pa_list, pp, pr_alloc_list); |
simple_unlock(&palloc->pa_slock); |
if (__predict_true(!cold)) |
splx(s); |
mutex_exit(&palloc->pa_lock); |
|
|
|
pool_reclaim_register(pp); |
} |
} |
|
|
/* |
/* |
Line 696 pool_init(struct pool *pp, size_t size, |
|
Line 880 pool_init(struct pool *pp, size_t size, |
|
void |
void |
pool_destroy(struct pool *pp) |
pool_destroy(struct pool *pp) |
{ |
{ |
|
struct pool_pagelist pq; |
struct pool_item_header *ph; |
struct pool_item_header *ph; |
struct pool_cache *pc; |
|
int s; |
|
|
|
/* Locking order: pool_allocator -> pool */ |
/* Remove from global pool list */ |
s = splvm(); |
mutex_enter(&pool_head_lock); |
simple_lock(&pp->pr_alloc->pa_slock); |
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); |
TAILQ_REMOVE(&pp->pr_alloc->pa_list, pp, pr_alloc_list); |
simple_unlock(&pp->pr_alloc->pa_slock); |
mutex_exit(&pp->pr_alloc->pa_lock); |
splx(s); |
|
|
|
/* Destroy all caches for this pool. */ |
mutex_enter(&pp->pr_lock); |
while ((pc = TAILQ_FIRST(&pp->pr_cachelist)) != NULL) |
|
pool_cache_destroy(pc); |
KASSERT(pp->pr_cache == NULL); |
|
|
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (pp->pr_nout != 0) { |
if (pp->pr_nout != 0) { |
Line 719 pool_destroy(struct pool *pp) |
|
Line 910 pool_destroy(struct pool *pp) |
|
} |
} |
#endif |
#endif |
|
|
/* Remove all pages */ |
|
while ((ph = LIST_FIRST(&pp->pr_emptypages)) != NULL) |
|
pr_rmpage(pp, ph, NULL); |
|
KASSERT(LIST_EMPTY(&pp->pr_fullpages)); |
KASSERT(LIST_EMPTY(&pp->pr_fullpages)); |
KASSERT(LIST_EMPTY(&pp->pr_partpages)); |
KASSERT(LIST_EMPTY(&pp->pr_partpages)); |
|
|
/* Remove from global pool list */ |
/* Remove all pages */ |
simple_lock(&pool_head_slock); |
LIST_INIT(&pq); |
TAILQ_REMOVE(&pool_head, pp, pr_poollist); |
while ((ph = LIST_FIRST(&pp->pr_emptypages)) != NULL) |
if (drainpp == pp) { |
pr_rmpage(pp, ph, &pq); |
drainpp = NULL; |
|
} |
mutex_exit(&pp->pr_lock); |
simple_unlock(&pool_head_slock); |
|
|
pr_pagelist_free(pp, &pq); |
|
|
#ifdef POOL_DIAGNOSTIC |
#ifdef POOL_DIAGNOSTIC |
if ((pp->pr_roflags & PR_LOGGING) != 0) |
if ((pp->pr_roflags & PR_LOGGING) != 0) |
free(pp->pr_log, M_TEMP); |
free(pp->pr_log, M_TEMP); |
#endif |
#endif |
|
|
|
cv_destroy(&pp->pr_cv); |
|
mutex_destroy(&pp->pr_lock); |
} |
} |
|
|
void |
void |
Line 753 pool_set_drain_hook(struct pool *pp, voi |
|
Line 945 pool_set_drain_hook(struct pool *pp, voi |
|
} |
} |
|
|
static struct pool_item_header * |
static struct pool_item_header * |
pool_alloc_item_header(struct pool *pp, caddr_t storage, int flags) |
pool_alloc_item_header(struct pool *pp, void *storage, int flags) |
{ |
{ |
struct pool_item_header *ph; |
struct pool_item_header *ph; |
int s; |
|
|
|
LOCK_ASSERT(simple_lock_held(&pp->pr_slock) == 0); |
|
|
|
if ((pp->pr_roflags & PR_PHINPAGE) != 0) |
if ((pp->pr_roflags & PR_PHINPAGE) != 0) |
ph = (struct pool_item_header *) (storage + pp->pr_phoffset); |
ph = (struct pool_item_header *) ((char *)storage + pp->pr_phoffset); |
else { |
else |
s = splvm(); |
|
ph = pool_get(pp->pr_phpool, flags); |
ph = pool_get(pp->pr_phpool, flags); |
splx(s); |
|
} |
|
|
|
return (ph); |
return (ph); |
} |
} |
|
|
/* |
/* |
* Grab an item from the pool; must be called at appropriate spl level |
* Grab an item from the pool. |
*/ |
*/ |
void * |
void * |
#ifdef POOL_DIAGNOSTIC |
#ifdef POOL_DIAGNOSTIC |
Line 793 pool_get(struct pool *pp, int flags) |
|
Line 979 pool_get(struct pool *pp, int flags) |
|
(flags & PR_WAITOK) != 0)) |
(flags & PR_WAITOK) != 0)) |
panic("pool_get: %s: must have NOWAIT", pp->pr_wchan); |
panic("pool_get: %s: must have NOWAIT", pp->pr_wchan); |
|
|
|
#endif /* DIAGNOSTIC */ |
#ifdef LOCKDEBUG |
#ifdef LOCKDEBUG |
if (flags & PR_WAITOK) |
if (flags & PR_WAITOK) { |
simple_lock_only_held(NULL, "pool_get(PR_WAITOK)"); |
ASSERT_SLEEPABLE(); |
|
} |
#endif |
#endif |
#endif /* DIAGNOSTIC */ |
|
|
|
simple_lock(&pp->pr_slock); |
mutex_enter(&pp->pr_lock); |
pr_enter(pp, file, line); |
pr_enter(pp, file, line); |
|
|
startover: |
startover: |
Line 811 pool_get(struct pool *pp, int flags) |
|
Line 998 pool_get(struct pool *pp, int flags) |
|
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (__predict_false(pp->pr_nout > pp->pr_hardlimit)) { |
if (__predict_false(pp->pr_nout > pp->pr_hardlimit)) { |
pr_leave(pp); |
pr_leave(pp); |
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
panic("pool_get: %s: crossed hard limit", pp->pr_wchan); |
panic("pool_get: %s: crossed hard limit", pp->pr_wchan); |
} |
} |
#endif |
#endif |
Line 823 pool_get(struct pool *pp, int flags) |
|
Line 1010 pool_get(struct pool *pp, int flags) |
|
* and check the hardlimit condition again. |
* and check the hardlimit condition again. |
*/ |
*/ |
pr_leave(pp); |
pr_leave(pp); |
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
(*pp->pr_drain_hook)(pp->pr_drain_hook_arg, flags); |
(*pp->pr_drain_hook)(pp->pr_drain_hook_arg, flags); |
simple_lock(&pp->pr_slock); |
mutex_enter(&pp->pr_lock); |
pr_enter(pp, file, line); |
pr_enter(pp, file, line); |
if (pp->pr_nout < pp->pr_hardlimit) |
if (pp->pr_nout < pp->pr_hardlimit) |
goto startover; |
goto startover; |
Line 838 pool_get(struct pool *pp, int flags) |
|
Line 1025 pool_get(struct pool *pp, int flags) |
|
*/ |
*/ |
pp->pr_flags |= PR_WANTED; |
pp->pr_flags |= PR_WANTED; |
pr_leave(pp); |
pr_leave(pp); |
ltsleep(pp, PSWP, pp->pr_wchan, 0, &pp->pr_slock); |
cv_wait(&pp->pr_cv, &pp->pr_lock); |
pr_enter(pp, file, line); |
pr_enter(pp, file, line); |
goto startover; |
goto startover; |
} |
} |
Line 854 pool_get(struct pool *pp, int flags) |
|
Line 1041 pool_get(struct pool *pp, int flags) |
|
pp->pr_nfail++; |
pp->pr_nfail++; |
|
|
pr_leave(pp); |
pr_leave(pp); |
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
return (NULL); |
return (NULL); |
} |
} |
|
|
Line 865 pool_get(struct pool *pp, int flags) |
|
Line 1052 pool_get(struct pool *pp, int flags) |
|
* has no items in its bucket. |
* has no items in its bucket. |
*/ |
*/ |
if ((ph = pp->pr_curpage) == NULL) { |
if ((ph = pp->pr_curpage) == NULL) { |
|
int error; |
|
|
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (pp->pr_nitems != 0) { |
if (pp->pr_nitems != 0) { |
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
printf("pool_get: %s: curpage NULL, nitems %u\n", |
printf("pool_get: %s: curpage NULL, nitems %u\n", |
pp->pr_wchan, pp->pr_nitems); |
pp->pr_wchan, pp->pr_nitems); |
panic("pool_get: nitems inconsistent"); |
panic("pool_get: nitems inconsistent"); |
Line 880 pool_get(struct pool *pp, int flags) |
|
Line 1069 pool_get(struct pool *pp, int flags) |
|
* may block. |
* may block. |
*/ |
*/ |
pr_leave(pp); |
pr_leave(pp); |
simple_unlock(&pp->pr_slock); |
error = pool_grow(pp, flags); |
v = pool_allocator_alloc(pp, flags); |
pr_enter(pp, file, line); |
if (__predict_true(v != NULL)) |
if (error != 0) { |
ph = pool_alloc_item_header(pp, v, flags); |
|
|
|
if (__predict_false(v == NULL || ph == NULL)) { |
|
if (v != NULL) |
|
pool_allocator_free(pp, v); |
|
|
|
simple_lock(&pp->pr_slock); |
|
pr_enter(pp, file, line); |
|
|
|
/* |
/* |
* We were unable to allocate a page or item |
* We were unable to allocate a page or item |
* header, but we released the lock during |
* header, but we released the lock during |
Line 901 pool_get(struct pool *pp, int flags) |
|
Line 1081 pool_get(struct pool *pp, int flags) |
|
if (pp->pr_curpage != NULL) |
if (pp->pr_curpage != NULL) |
goto startover; |
goto startover; |
|
|
if ((flags & PR_WAITOK) == 0) { |
pp->pr_nfail++; |
pp->pr_nfail++; |
|
pr_leave(pp); |
|
simple_unlock(&pp->pr_slock); |
|
return (NULL); |
|
} |
|
|
|
/* |
|
* Wait for items to be returned to this pool. |
|
* |
|
* XXX: maybe we should wake up once a second and |
|
* try again? |
|
*/ |
|
pp->pr_flags |= PR_WANTED; |
|
/* PA_WANTED is already set on the allocator. */ |
|
pr_leave(pp); |
pr_leave(pp); |
ltsleep(pp, PSWP, pp->pr_wchan, 0, &pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
pr_enter(pp, file, line); |
return (NULL); |
goto startover; |
|
} |
} |
|
|
/* We have more memory; add it to the pool */ |
|
simple_lock(&pp->pr_slock); |
|
pr_enter(pp, file, line); |
|
pool_prime_page(pp, v, ph); |
|
pp->pr_npagealloc++; |
|
|
|
/* Start the allocation process over. */ |
/* Start the allocation process over. */ |
goto startover; |
goto startover; |
} |
} |
Line 935 pool_get(struct pool *pp, int flags) |
|
Line 1094 pool_get(struct pool *pp, int flags) |
|
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (__predict_false(ph->ph_nmissing == pp->pr_itemsperpage)) { |
if (__predict_false(ph->ph_nmissing == pp->pr_itemsperpage)) { |
pr_leave(pp); |
pr_leave(pp); |
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
panic("pool_get: %s: page empty", pp->pr_wchan); |
panic("pool_get: %s: page empty", pp->pr_wchan); |
} |
} |
#endif |
#endif |
Line 944 pool_get(struct pool *pp, int flags) |
|
Line 1103 pool_get(struct pool *pp, int flags) |
|
pr_log(pp, v, PRLOG_GET, file, line); |
pr_log(pp, v, PRLOG_GET, file, line); |
#endif |
#endif |
} else { |
} else { |
v = pi = TAILQ_FIRST(&ph->ph_itemlist); |
v = pi = LIST_FIRST(&ph->ph_itemlist); |
if (__predict_false(v == NULL)) { |
if (__predict_false(v == NULL)) { |
pr_leave(pp); |
pr_leave(pp); |
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
panic("pool_get: %s: page empty", pp->pr_wchan); |
panic("pool_get: %s: page empty", pp->pr_wchan); |
} |
} |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (__predict_false(pp->pr_nitems == 0)) { |
if (__predict_false(pp->pr_nitems == 0)) { |
pr_leave(pp); |
pr_leave(pp); |
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
printf("pool_get: %s: items on itemlist, nitems %u\n", |
printf("pool_get: %s: items on itemlist, nitems %u\n", |
pp->pr_wchan, pp->pr_nitems); |
pp->pr_wchan, pp->pr_nitems); |
panic("pool_get: nitems inconsistent"); |
panic("pool_get: nitems inconsistent"); |
Line 976 pool_get(struct pool *pp, int flags) |
|
Line 1135 pool_get(struct pool *pp, int flags) |
|
/* |
/* |
* Remove from item list. |
* Remove from item list. |
*/ |
*/ |
TAILQ_REMOVE(&ph->ph_itemlist, pi, pi_list); |
LIST_REMOVE(pi, pi_list); |
} |
} |
pp->pr_nitems--; |
pp->pr_nitems--; |
pp->pr_nout++; |
pp->pr_nout++; |
Line 998 pool_get(struct pool *pp, int flags) |
|
Line 1157 pool_get(struct pool *pp, int flags) |
|
if (ph->ph_nmissing == pp->pr_itemsperpage) { |
if (ph->ph_nmissing == pp->pr_itemsperpage) { |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (__predict_false((pp->pr_roflags & PR_NOTOUCH) == 0 && |
if (__predict_false((pp->pr_roflags & PR_NOTOUCH) == 0 && |
!TAILQ_EMPTY(&ph->ph_itemlist))) { |
!LIST_EMPTY(&ph->ph_itemlist))) { |
pr_leave(pp); |
pr_leave(pp); |
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
panic("pool_get: %s: nmissing inconsistent", |
panic("pool_get: %s: nmissing inconsistent", |
pp->pr_wchan); |
pp->pr_wchan); |
} |
} |
Line 1015 pool_get(struct pool *pp, int flags) |
|
Line 1174 pool_get(struct pool *pp, int flags) |
|
} |
} |
|
|
pp->pr_nget++; |
pp->pr_nget++; |
|
pr_leave(pp); |
|
|
/* |
/* |
* If we have a low water mark and we are now below that low |
* If we have a low water mark and we are now below that low |
Line 1028 pool_get(struct pool *pp, int flags) |
|
Line 1188 pool_get(struct pool *pp, int flags) |
|
*/ |
*/ |
} |
} |
|
|
pr_leave(pp); |
mutex_exit(&pp->pr_lock); |
simple_unlock(&pp->pr_slock); |
KASSERT((((vaddr_t)v + pp->pr_itemoffset) & (pp->pr_align - 1)) == 0); |
|
FREECHECK_OUT(&pp->pr_freecheck, v); |
return (v); |
return (v); |
} |
} |
|
|
Line 1037 pool_get(struct pool *pp, int flags) |
|
Line 1198 pool_get(struct pool *pp, int flags) |
|
* Internal version of pool_put(). Pool is already locked/entered. |
* Internal version of pool_put(). Pool is already locked/entered. |
*/ |
*/ |
static void |
static void |
pool_do_put(struct pool *pp, void *v) |
pool_do_put(struct pool *pp, void *v, struct pool_pagelist *pq) |
{ |
{ |
struct pool_item *pi = v; |
struct pool_item *pi = v; |
struct pool_item_header *ph; |
struct pool_item_header *ph; |
caddr_t page; |
|
int s; |
|
|
|
LOCK_ASSERT(simple_lock_held(&pp->pr_slock)); |
KASSERT(mutex_owned(&pp->pr_lock)); |
|
FREECHECK_IN(&pp->pr_freecheck, v); |
page = (caddr_t)((u_long)v & pp->pr_alloc->pa_pagemask); |
LOCKDEBUG_MEM_CHECK(v, pp->pr_size); |
|
|
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (__predict_false(pp->pr_nout == 0)) { |
if (__predict_false(pp->pr_nout == 0)) { |
Line 1056 pool_do_put(struct pool *pp, void *v) |
|
Line 1215 pool_do_put(struct pool *pp, void *v) |
|
} |
} |
#endif |
#endif |
|
|
if (__predict_false((ph = pr_find_pagehead(pp, page)) == NULL)) { |
if (__predict_false((ph = pr_find_pagehead(pp, v)) == NULL)) { |
pr_printlog(pp, NULL, printf); |
pr_printlog(pp, NULL, printf); |
panic("pool_put: %s: page header missing", pp->pr_wchan); |
panic("pool_put: %s: page header missing", pp->pr_wchan); |
} |
} |
|
|
#ifdef LOCKDEBUG |
|
/* |
|
* Check if we're freeing a locked simple lock. |
|
*/ |
|
simple_lock_freecheck((caddr_t)pi, ((caddr_t)pi) + pp->pr_size); |
|
#endif |
|
|
|
/* |
/* |
* Return to item list. |
* Return to item list. |
*/ |
*/ |
Line 1087 pool_do_put(struct pool *pp, void *v) |
|
Line 1239 pool_do_put(struct pool *pp, void *v) |
|
} |
} |
#endif |
#endif |
|
|
TAILQ_INSERT_HEAD(&ph->ph_itemlist, pi, pi_list); |
LIST_INSERT_HEAD(&ph->ph_itemlist, pi, pi_list); |
} |
} |
KDASSERT(ph->ph_nmissing != 0); |
KDASSERT(ph->ph_nmissing != 0); |
ph->ph_nmissing--; |
ph->ph_nmissing--; |
Line 1101 pool_do_put(struct pool *pp, void *v) |
|
Line 1253 pool_do_put(struct pool *pp, void *v) |
|
|
|
if (pp->pr_flags & PR_WANTED) { |
if (pp->pr_flags & PR_WANTED) { |
pp->pr_flags &= ~PR_WANTED; |
pp->pr_flags &= ~PR_WANTED; |
if (ph->ph_nmissing == 0) |
cv_broadcast(&pp->pr_cv); |
pp->pr_nidle++; |
|
wakeup((caddr_t)pp); |
|
return; |
|
} |
} |
|
|
/* |
/* |
Line 1123 pool_do_put(struct pool *pp, void *v) |
|
Line 1272 pool_do_put(struct pool *pp, void *v) |
|
if (ph->ph_nmissing == 0) { |
if (ph->ph_nmissing == 0) { |
pp->pr_nidle++; |
pp->pr_nidle++; |
if (pp->pr_npages > pp->pr_minpages && |
if (pp->pr_npages > pp->pr_minpages && |
(pp->pr_npages > pp->pr_maxpages || |
pp->pr_npages > pp->pr_maxpages) { |
(pp->pr_alloc->pa_flags & PA_WANT) != 0)) { |
pr_rmpage(pp, ph, pq); |
simple_unlock(&pp->pr_slock); |
|
pr_rmpage(pp, ph, NULL); |
|
simple_lock(&pp->pr_slock); |
|
} else { |
} else { |
LIST_REMOVE(ph, ph_pagelist); |
LIST_REMOVE(ph, ph_pagelist); |
LIST_INSERT_HEAD(&pp->pr_emptypages, ph, ph_pagelist); |
LIST_INSERT_HEAD(&pp->pr_emptypages, ph, ph_pagelist); |
Line 1137 pool_do_put(struct pool *pp, void *v) |
|
Line 1283 pool_do_put(struct pool *pp, void *v) |
|
* be idle for some period of time before it can |
* be idle for some period of time before it can |
* be reclaimed by the pagedaemon. This minimizes |
* be reclaimed by the pagedaemon. This minimizes |
* ping-pong'ing for memory. |
* ping-pong'ing for memory. |
|
* |
|
* note for 64-bit time_t: truncating to 32-bit is not |
|
* a problem for our usage. |
*/ |
*/ |
s = splclock(); |
ph->ph_time = time_uptime; |
ph->ph_time = mono_time; |
|
splx(s); |
|
} |
} |
pool_update_curpage(pp); |
pool_update_curpage(pp); |
} |
} |
Line 1159 pool_do_put(struct pool *pp, void *v) |
|
Line 1306 pool_do_put(struct pool *pp, void *v) |
|
} |
} |
|
|
/* |
/* |
* Return resource to the pool; must be called at appropriate spl level |
* Return resource to the pool. |
*/ |
*/ |
#ifdef POOL_DIAGNOSTIC |
#ifdef POOL_DIAGNOSTIC |
void |
void |
_pool_put(struct pool *pp, void *v, const char *file, long line) |
_pool_put(struct pool *pp, void *v, const char *file, long line) |
{ |
{ |
|
struct pool_pagelist pq; |
|
|
|
LIST_INIT(&pq); |
|
|
simple_lock(&pp->pr_slock); |
mutex_enter(&pp->pr_lock); |
pr_enter(pp, file, line); |
pr_enter(pp, file, line); |
|
|
pr_log(pp, v, PRLOG_PUT, file, line); |
pr_log(pp, v, PRLOG_PUT, file, line); |
|
|
pool_do_put(pp, v); |
pool_do_put(pp, v, &pq); |
|
|
pr_leave(pp); |
pr_leave(pp); |
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
|
|
|
pr_pagelist_free(pp, &pq); |
} |
} |
#undef pool_put |
#undef pool_put |
#endif /* POOL_DIAGNOSTIC */ |
#endif /* POOL_DIAGNOSTIC */ |
Line 1182 _pool_put(struct pool *pp, void *v, cons |
|
Line 1334 _pool_put(struct pool *pp, void *v, cons |
|
void |
void |
pool_put(struct pool *pp, void *v) |
pool_put(struct pool *pp, void *v) |
{ |
{ |
|
struct pool_pagelist pq; |
|
|
simple_lock(&pp->pr_slock); |
LIST_INIT(&pq); |
|
|
pool_do_put(pp, v); |
mutex_enter(&pp->pr_lock); |
|
pool_do_put(pp, v, &pq); |
|
mutex_exit(&pp->pr_lock); |
|
|
simple_unlock(&pp->pr_slock); |
pr_pagelist_free(pp, &pq); |
} |
} |
|
|
#ifdef POOL_DIAGNOSTIC |
#ifdef POOL_DIAGNOSTIC |
Line 1195 pool_put(struct pool *pp, void *v) |
|
Line 1350 pool_put(struct pool *pp, void *v) |
|
#endif |
#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. |
* Add N items to the pool. |
*/ |
*/ |
int |
int |
pool_prime(struct pool *pp, int n) |
pool_prime(struct pool *pp, int n) |
{ |
{ |
struct pool_item_header *ph = NULL; |
|
caddr_t cp; |
|
int newpages; |
int newpages; |
|
int error = 0; |
|
|
simple_lock(&pp->pr_slock); |
mutex_enter(&pp->pr_lock); |
|
|
newpages = roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
newpages = roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
|
|
while (newpages-- > 0) { |
while (newpages-- > 0) { |
simple_unlock(&pp->pr_slock); |
error = pool_grow(pp, PR_NOWAIT); |
cp = pool_allocator_alloc(pp, PR_NOWAIT); |
if (error) { |
if (__predict_true(cp != NULL)) |
|
ph = pool_alloc_item_header(pp, cp, PR_NOWAIT); |
|
|
|
if (__predict_false(cp == NULL || ph == NULL)) { |
|
if (cp != NULL) |
|
pool_allocator_free(pp, cp); |
|
simple_lock(&pp->pr_slock); |
|
break; |
break; |
} |
} |
|
|
simple_lock(&pp->pr_slock); |
|
pool_prime_page(pp, cp, ph); |
|
pp->pr_npagealloc++; |
|
pp->pr_minpages++; |
pp->pr_minpages++; |
} |
} |
|
|
if (pp->pr_minpages >= pp->pr_maxpages) |
if (pp->pr_minpages >= pp->pr_maxpages) |
pp->pr_maxpages = pp->pr_minpages + 1; /* XXX */ |
pp->pr_maxpages = pp->pr_minpages + 1; /* XXX */ |
|
|
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
return (0); |
return error; |
} |
} |
|
|
/* |
/* |
Line 1240 pool_prime(struct pool *pp, int n) |
|
Line 1416 pool_prime(struct pool *pp, int n) |
|
* Note, we must be called with the pool descriptor LOCKED. |
* Note, we must be called with the pool descriptor LOCKED. |
*/ |
*/ |
static void |
static void |
pool_prime_page(struct pool *pp, caddr_t storage, struct pool_item_header *ph) |
pool_prime_page(struct pool *pp, void *storage, struct pool_item_header *ph) |
{ |
{ |
struct pool_item *pi; |
struct pool_item *pi; |
caddr_t cp = storage; |
void *cp = storage; |
unsigned int align = pp->pr_align; |
const unsigned int align = pp->pr_align; |
unsigned int ioff = pp->pr_itemoffset; |
const unsigned int ioff = pp->pr_itemoffset; |
int n; |
int n; |
int s; |
|
|
|
LOCK_ASSERT(simple_lock_held(&pp->pr_slock)); |
KASSERT(mutex_owned(&pp->pr_lock)); |
|
|
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (((u_long)cp & (pp->pr_alloc->pa_pagesz - 1)) != 0) |
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); |
panic("pool_prime_page: %s: unaligned page", pp->pr_wchan); |
#endif |
#endif |
|
|
Line 1260 pool_prime_page(struct pool *pp, caddr_t |
|
Line 1436 pool_prime_page(struct pool *pp, caddr_t |
|
* Insert page header. |
* Insert page header. |
*/ |
*/ |
LIST_INSERT_HEAD(&pp->pr_emptypages, ph, ph_pagelist); |
LIST_INSERT_HEAD(&pp->pr_emptypages, ph, ph_pagelist); |
TAILQ_INIT(&ph->ph_itemlist); |
LIST_INIT(&ph->ph_itemlist); |
ph->ph_page = storage; |
ph->ph_page = storage; |
ph->ph_nmissing = 0; |
ph->ph_nmissing = 0; |
s = splclock(); |
ph->ph_time = time_uptime; |
ph->ph_time = mono_time; |
|
splx(s); |
|
if ((pp->pr_roflags & PR_PHINPAGE) == 0) |
if ((pp->pr_roflags & PR_PHINPAGE) == 0) |
SPLAY_INSERT(phtree, &pp->pr_phtree, ph); |
SPLAY_INSERT(phtree, &pp->pr_phtree, ph); |
|
|
Line 1274 pool_prime_page(struct pool *pp, caddr_t |
|
Line 1448 pool_prime_page(struct pool *pp, caddr_t |
|
/* |
/* |
* Color this page. |
* Color this page. |
*/ |
*/ |
cp = (caddr_t)(cp + pp->pr_curcolor); |
ph->ph_off = pp->pr_curcolor; |
|
cp = (char *)cp + ph->ph_off; |
if ((pp->pr_curcolor += align) > pp->pr_maxcolor) |
if ((pp->pr_curcolor += align) > pp->pr_maxcolor) |
pp->pr_curcolor = 0; |
pp->pr_curcolor = 0; |
|
|
Line 1282 pool_prime_page(struct pool *pp, caddr_t |
|
Line 1457 pool_prime_page(struct pool *pp, caddr_t |
|
* Adjust storage to apply aligment to `pr_itemoffset' in each item. |
* Adjust storage to apply aligment to `pr_itemoffset' in each item. |
*/ |
*/ |
if (ioff != 0) |
if (ioff != 0) |
cp = (caddr_t)(cp + (align - ioff)); |
cp = (char *)cp + align - ioff; |
|
|
|
KASSERT((((vaddr_t)cp + ioff) & (align - 1)) == 0); |
|
|
/* |
/* |
* Insert remaining chunks on the bucket list. |
* Insert remaining chunks on the bucket list. |
Line 1291 pool_prime_page(struct pool *pp, caddr_t |
|
Line 1468 pool_prime_page(struct pool *pp, caddr_t |
|
pp->pr_nitems += n; |
pp->pr_nitems += n; |
|
|
if (pp->pr_roflags & PR_NOTOUCH) { |
if (pp->pr_roflags & PR_NOTOUCH) { |
pool_item_freelist_t *freelist = PR_FREELIST(ph); |
pr_item_notouch_init(pp, ph); |
int i; |
|
|
|
ph->ph_off = cp - storage; |
|
ph->ph_firstfree = 0; |
|
for (i = 0; i < n - 1; i++) |
|
freelist[i] = i + 1; |
|
freelist[n - 1] = PR_INDEX_EOL; |
|
} else { |
} else { |
while (n--) { |
while (n--) { |
pi = (struct pool_item *)cp; |
pi = (struct pool_item *)cp; |
Line 1306 pool_prime_page(struct pool *pp, caddr_t |
|
Line 1476 pool_prime_page(struct pool *pp, caddr_t |
|
KASSERT(((((vaddr_t)pi) + ioff) & (align - 1)) == 0); |
KASSERT(((((vaddr_t)pi) + ioff) & (align - 1)) == 0); |
|
|
/* Insert on page list */ |
/* Insert on page list */ |
TAILQ_INSERT_TAIL(&ph->ph_itemlist, pi, pi_list); |
LIST_INSERT_HEAD(&ph->ph_itemlist, pi, pi_list); |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
pi->pi_magic = PI_MAGIC; |
pi->pi_magic = PI_MAGIC; |
#endif |
#endif |
cp = (caddr_t)(cp + pp->pr_size); |
cp = (char *)cp + pp->pr_size; |
|
|
|
KASSERT((((vaddr_t)cp + ioff) & (align - 1)) == 0); |
} |
} |
} |
} |
|
|
Line 1336 pool_prime_page(struct pool *pp, caddr_t |
|
Line 1508 pool_prime_page(struct pool *pp, caddr_t |
|
static int |
static int |
pool_catchup(struct pool *pp) |
pool_catchup(struct pool *pp) |
{ |
{ |
struct pool_item_header *ph = NULL; |
|
caddr_t cp; |
|
int error = 0; |
int error = 0; |
|
|
while (POOL_NEEDS_CATCHUP(pp)) { |
while (POOL_NEEDS_CATCHUP(pp)) { |
/* |
error = pool_grow(pp, PR_NOWAIT); |
* Call the page back-end allocator for more memory. |
if (error) { |
* |
|
* XXX: We never wait, so should we bother unlocking |
|
* the pool descriptor? |
|
*/ |
|
simple_unlock(&pp->pr_slock); |
|
cp = pool_allocator_alloc(pp, PR_NOWAIT); |
|
if (__predict_true(cp != NULL)) |
|
ph = pool_alloc_item_header(pp, cp, PR_NOWAIT); |
|
if (__predict_false(cp == NULL || ph == NULL)) { |
|
if (cp != NULL) |
|
pool_allocator_free(pp, cp); |
|
error = ENOMEM; |
|
simple_lock(&pp->pr_slock); |
|
break; |
break; |
} |
} |
simple_lock(&pp->pr_slock); |
|
pool_prime_page(pp, cp, ph); |
|
pp->pr_npagealloc++; |
|
} |
} |
|
return error; |
return (error); |
|
} |
} |
|
|
static void |
static void |
|
|
pool_setlowat(struct pool *pp, int n) |
pool_setlowat(struct pool *pp, int n) |
{ |
{ |
|
|
simple_lock(&pp->pr_slock); |
mutex_enter(&pp->pr_lock); |
|
|
pp->pr_minitems = n; |
pp->pr_minitems = n; |
pp->pr_minpages = (n == 0) |
pp->pr_minpages = (n == 0) |
Line 1396 pool_setlowat(struct pool *pp, int n) |
|
Line 1549 pool_setlowat(struct pool *pp, int n) |
|
*/ |
*/ |
} |
} |
|
|
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
} |
} |
|
|
void |
void |
pool_sethiwat(struct pool *pp, int n) |
pool_sethiwat(struct pool *pp, int n) |
{ |
{ |
|
|
simple_lock(&pp->pr_slock); |
mutex_enter(&pp->pr_lock); |
|
|
pp->pr_maxpages = (n == 0) |
pp->pr_maxpages = (n == 0) |
? 0 |
? 0 |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
|
|
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
} |
} |
|
|
void |
void |
pool_sethardlimit(struct pool *pp, int n, const char *warnmess, int ratecap) |
pool_sethardlimit(struct pool *pp, int n, const char *warnmess, int ratecap) |
{ |
{ |
|
|
simple_lock(&pp->pr_slock); |
mutex_enter(&pp->pr_lock); |
|
|
pp->pr_hardlimit = n; |
pp->pr_hardlimit = n; |
pp->pr_hardlimit_warning = warnmess; |
pp->pr_hardlimit_warning = warnmess; |
Line 1432 pool_sethardlimit(struct pool *pp, int n |
|
Line 1585 pool_sethardlimit(struct pool *pp, int n |
|
? 0 |
? 0 |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
|
|
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
} |
} |
|
|
/* |
/* |
Line 1446 pool_reclaim(struct pool *pp) |
|
Line 1599 pool_reclaim(struct pool *pp) |
|
#endif |
#endif |
{ |
{ |
struct pool_item_header *ph, *phnext; |
struct pool_item_header *ph, *phnext; |
struct pool_cache *pc; |
|
struct timeval curtime; |
|
struct pool_pagelist pq; |
struct pool_pagelist pq; |
struct timeval diff; |
uint32_t curtime; |
int s; |
bool klock; |
|
int rv; |
|
|
if (pp->pr_drain_hook != NULL) { |
if (pp->pr_drain_hook != NULL) { |
/* |
/* |
Line 1459 pool_reclaim(struct pool *pp) |
|
Line 1611 pool_reclaim(struct pool *pp) |
|
(*pp->pr_drain_hook)(pp->pr_drain_hook_arg, PR_NOWAIT); |
(*pp->pr_drain_hook)(pp->pr_drain_hook_arg, PR_NOWAIT); |
} |
} |
|
|
if (simple_lock_try(&pp->pr_slock) == 0) |
/* |
|
* 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); |
return (0); |
|
} |
pr_enter(pp, file, line); |
pr_enter(pp, file, line); |
|
|
LIST_INIT(&pq); |
LIST_INIT(&pq); |
|
|
/* |
curtime = time_uptime; |
* Reclaim items from the pool's caches. |
|
*/ |
|
TAILQ_FOREACH(pc, &pp->pr_cachelist, pc_poollist) |
|
pool_cache_reclaim(pc); |
|
|
|
s = splclock(); |
|
curtime = mono_time; |
|
splx(s); |
|
|
|
for (ph = LIST_FIRST(&pp->pr_emptypages); ph != NULL; ph = phnext) { |
for (ph = LIST_FIRST(&pp->pr_emptypages); ph != NULL; ph = phnext) { |
phnext = LIST_NEXT(ph, ph_pagelist); |
phnext = LIST_NEXT(ph, ph_pagelist); |
Line 1483 pool_reclaim(struct pool *pp) |
|
Line 1646 pool_reclaim(struct pool *pp) |
|
break; |
break; |
|
|
KASSERT(ph->ph_nmissing == 0); |
KASSERT(ph->ph_nmissing == 0); |
timersub(&curtime, &ph->ph_time, &diff); |
if (curtime - ph->ph_time < pool_inactive_time |
if (diff.tv_sec < pool_inactive_time) |
&& !pa_starved_p(pp->pr_alloc)) |
continue; |
continue; |
|
|
/* |
/* |
Line 1499 pool_reclaim(struct pool *pp) |
|
Line 1662 pool_reclaim(struct pool *pp) |
|
} |
} |
|
|
pr_leave(pp); |
pr_leave(pp); |
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
|
|
if (LIST_EMPTY(&pq)) |
if (LIST_EMPTY(&pq)) |
return (0); |
rv = 0; |
|
else { |
|
pr_pagelist_free(pp, &pq); |
|
rv = 1; |
|
} |
|
|
while ((ph = LIST_FIRST(&pq)) != NULL) { |
if (klock) { |
LIST_REMOVE(ph, ph_pagelist); |
KERNEL_UNLOCK_ONE(NULL); |
pool_allocator_free(pp, ph->ph_page); |
|
if (pp->pr_roflags & PR_PHINPAGE) { |
|
continue; |
|
} |
|
s = splvm(); |
|
pool_put(pp->pr_phpool, ph); |
|
splx(s); |
|
} |
} |
|
|
return (1); |
return (rv); |
} |
} |
|
|
/* |
/* |
* Drain pools, one at a time. |
* 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, we must never be called from an interrupt context. |
* Note, must never be called from interrupt context. |
*/ |
*/ |
void |
void |
pool_drain(void *arg) |
pool_drain_start(struct pool **ppp, uint64_t *wp) |
{ |
{ |
struct pool *pp; |
struct pool *pp; |
int s; |
|
|
KASSERT(!TAILQ_EMPTY(&pool_head)); |
|
|
pp = NULL; |
pp = NULL; |
s = splvm(); |
|
simple_lock(&pool_head_slock); |
/* Find next pool to drain, and add a reference. */ |
if (drainpp == NULL) { |
mutex_enter(&pool_head_lock); |
drainpp = TAILQ_FIRST(&pool_head); |
do { |
} |
if (drainpp == NULL) { |
if (drainpp) { |
drainpp = TAILQ_FIRST(&pool_head); |
pp = drainpp; |
} |
drainpp = TAILQ_NEXT(pp, pr_poollist); |
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); |
} |
} |
simple_unlock(&pool_head_slock); |
|
pool_reclaim(pp); |
|
splx(s); |
|
} |
} |
|
|
/* |
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. |
* Diagnostic helpers. |
*/ |
*/ |
void |
void |
pool_print(struct pool *pp, const char *modif) |
pool_print(struct pool *pp, const char *modif) |
{ |
{ |
int s; |
|
|
|
s = splvm(); |
|
if (simple_lock_try(&pp->pr_slock) == 0) { |
|
printf("pool %s is locked; try again later\n", |
|
pp->pr_wchan); |
|
splx(s); |
|
return; |
|
} |
|
pool_print1(pp, modif, printf); |
pool_print1(pp, modif, printf); |
simple_unlock(&pp->pr_slock); |
} |
splx(s); |
|
|
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 |
void |
pool_printit(struct pool *pp, const char *modif, void (*pr)(const char *, ...)) |
pool_printit(struct pool *pp, const char *modif, void (*pr)(const char *, ...)) |
{ |
{ |
int didlock = 0; |
|
|
|
if (pp == NULL) { |
if (pp == NULL) { |
(*pr)("Must specify a pool to print.\n"); |
(*pr)("Must specify a pool to print.\n"); |
return; |
return; |
} |
} |
|
|
/* |
|
* Called from DDB; interrupts should be blocked, and all |
|
* other processors should be paused. We can skip locking |
|
* the pool in this case. |
|
* |
|
* We do a simple_lock_try() just to print the lock |
|
* status, however. |
|
*/ |
|
|
|
if (simple_lock_try(&pp->pr_slock) == 0) |
|
(*pr)("WARNING: pool %s is locked\n", pp->pr_wchan); |
|
else |
|
didlock = 1; |
|
|
|
pool_print1(pp, modif, pr); |
pool_print1(pp, modif, pr); |
|
|
if (didlock) |
|
simple_unlock(&pp->pr_slock); |
|
} |
} |
|
|
static void |
static void |
Line 1603 pool_print_pagelist(struct pool *pp, str |
|
Line 1787 pool_print_pagelist(struct pool *pp, str |
|
#endif |
#endif |
|
|
LIST_FOREACH(ph, pl, ph_pagelist) { |
LIST_FOREACH(ph, pl, ph_pagelist) { |
(*pr)("\t\tpage %p, nmissing %d, time %lu,%lu\n", |
(*pr)("\t\tpage %p, nmissing %d, time %" PRIu32 "\n", |
ph->ph_page, ph->ph_nmissing, |
ph->ph_page, ph->ph_nmissing, ph->ph_time); |
(u_long)ph->ph_time.tv_sec, |
|
(u_long)ph->ph_time.tv_usec); |
|
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (!(pp->pr_roflags & PR_NOTOUCH)) { |
if (!(pp->pr_roflags & PR_NOTOUCH)) { |
TAILQ_FOREACH(pi, &ph->ph_itemlist, pi_list) { |
LIST_FOREACH(pi, &ph->ph_itemlist, pi_list) { |
if (pi->pi_magic != PI_MAGIC) { |
if (pi->pi_magic != PI_MAGIC) { |
(*pr)("\t\t\titem %p, magic 0x%x\n", |
(*pr)("\t\t\titem %p, magic 0x%x\n", |
pi, pi->pi_magic); |
pi, pi->pi_magic); |
|
|
pool_print1(struct pool *pp, const char *modif, void (*pr)(const char *, ...)) |
pool_print1(struct pool *pp, const char *modif, void (*pr)(const char *, ...)) |
{ |
{ |
struct pool_item_header *ph; |
struct pool_item_header *ph; |
struct pool_cache *pc; |
pool_cache_t pc; |
struct pool_cache_group *pcg; |
pcg_t *pcg; |
|
pool_cache_cpu_t *cc; |
|
uint64_t cpuhit, cpumiss; |
int i, print_log = 0, print_pagelist = 0, print_cache = 0; |
int i, print_log = 0, print_pagelist = 0, print_cache = 0; |
char c; |
char c; |
|
|
Line 1638 pool_print1(struct pool *pp, const char |
|
Line 1822 pool_print1(struct pool *pp, const char |
|
print_cache = 1; |
print_cache = 1; |
} |
} |
|
|
(*pr)("POOL %s: size %u, align %u, ioff %u, roflags 0x%08x\n", |
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_wchan, pp->pr_size, pp->pr_align, pp->pr_itemoffset, |
pp->pr_roflags); |
pp->pr_roflags); |
(*pr)("\talloc %p\n", pp->pr_alloc); |
(*pr)("\talloc %p\n", pp->pr_alloc); |
Line 1647 pool_print1(struct pool *pp, const char |
|
Line 1837 pool_print1(struct pool *pp, const char |
|
(*pr)("\titemsperpage %u, nitems %u, nout %u, hardlimit %u\n", |
(*pr)("\titemsperpage %u, nitems %u, nout %u, hardlimit %u\n", |
pp->pr_itemsperpage, pp->pr_nitems, pp->pr_nout, pp->pr_hardlimit); |
pp->pr_itemsperpage, pp->pr_nitems, pp->pr_nout, pp->pr_hardlimit); |
|
|
(*pr)("\n\tnget %lu, nfail %lu, nput %lu\n", |
(*pr)("\tnget %lu, nfail %lu, nput %lu\n", |
pp->pr_nget, pp->pr_nfail, pp->pr_nput); |
pp->pr_nget, pp->pr_nfail, pp->pr_nput); |
(*pr)("\tnpagealloc %lu, npagefree %lu, hiwat %u, nidle %lu\n", |
(*pr)("\tnpagealloc %lu, npagefree %lu, hiwat %u, nidle %lu\n", |
pp->pr_npagealloc, pp->pr_npagefree, pp->pr_hiwat, pp->pr_nidle); |
pp->pr_npagealloc, pp->pr_npagefree, pp->pr_hiwat, pp->pr_nidle); |
Line 1677 pool_print1(struct pool *pp, const char |
|
Line 1867 pool_print1(struct pool *pp, const char |
|
(*pr)("\n"); |
(*pr)("\n"); |
if ((pp->pr_roflags & PR_LOGGING) == 0) |
if ((pp->pr_roflags & PR_LOGGING) == 0) |
(*pr)("\tno log\n"); |
(*pr)("\tno log\n"); |
else |
else { |
pr_printlog(pp, NULL, pr); |
pr_printlog(pp, NULL, pr); |
|
} |
|
|
skip_log: |
skip_log: |
if (print_cache == 0) |
|
goto skip_cache; |
|
|
|
TAILQ_FOREACH(pc, &pp->pr_cachelist, pc_poollist) { |
#define PR_GROUPLIST(pcg) \ |
(*pr)("\tcache %p: allocfrom %p freeto %p\n", pc, |
(*pr)("\t\tgroup %p: avail %d\n", pcg, pcg->pcg_avail); \ |
pc->pc_allocfrom, pc->pc_freeto); |
for (i = 0; i < pcg->pcg_size; i++) { \ |
(*pr)("\t hits %lu misses %lu ngroups %lu nitems %lu\n", |
if (pcg->pcg_objects[i].pcgo_pa != \ |
pc->pc_hits, pc->pc_misses, pc->pc_ngroups, pc->pc_nitems); |
POOL_PADDR_INVALID) { \ |
TAILQ_FOREACH(pcg, &pc->pc_grouplist, pcg_list) { |
(*pr)("\t\t\t%p, 0x%llx\n", \ |
(*pr)("\t\tgroup %p: avail %d\n", pcg, pcg->pcg_avail); |
pcg->pcg_objects[i].pcgo_va, \ |
for (i = 0; i < PCG_NOBJECTS; i++) { |
(unsigned long long) \ |
if (pcg->pcg_objects[i].pcgo_pa != |
pcg->pcg_objects[i].pcgo_pa); \ |
POOL_PADDR_INVALID) { |
} else { \ |
(*pr)("\t\t\t%p, 0x%llx\n", |
(*pr)("\t\t\t%p\n", \ |
pcg->pcg_objects[i].pcgo_va, |
pcg->pcg_objects[i].pcgo_va); \ |
(unsigned long long) |
} \ |
pcg->pcg_objects[i].pcgo_pa); |
} |
} else { |
|
(*pr)("\t\t\t%p\n", |
if (pc != NULL) { |
pcg->pcg_objects[i].pcgo_va); |
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 |
|
|
skip_cache: |
|
pr_enter_check(pp, pr); |
pr_enter_check(pp, pr); |
} |
} |
|
|
|
|
pool_chk_page(struct pool *pp, const char *label, struct pool_item_header *ph) |
pool_chk_page(struct pool *pp, const char *label, struct pool_item_header *ph) |
{ |
{ |
struct pool_item *pi; |
struct pool_item *pi; |
caddr_t page; |
void *page; |
int n; |
int n; |
|
|
page = (caddr_t)((u_long)ph & pp->pr_alloc->pa_pagemask); |
if ((pp->pr_roflags & PR_NOALIGN) == 0) { |
if (page != ph->ph_page && |
page = (void *)((uintptr_t)ph & pp->pr_alloc->pa_pagemask); |
(pp->pr_roflags & PR_PHINPAGE) != 0) { |
if (page != ph->ph_page && |
if (label != NULL) |
(pp->pr_roflags & PR_PHINPAGE) != 0) { |
printf("%s: ", label); |
if (label != NULL) |
printf("pool(%p:%s): page inconsistency: page %p;" |
printf("%s: ", label); |
" at page head addr %p (p %p)\n", pp, |
printf("pool(%p:%s): page inconsistency: page %p;" |
pp->pr_wchan, ph->ph_page, |
" at page head addr %p (p %p)\n", pp, |
ph, page); |
pp->pr_wchan, ph->ph_page, |
return 1; |
ph, page); |
|
return 1; |
|
} |
} |
} |
|
|
if ((pp->pr_roflags & PR_NOTOUCH) != 0) |
if ((pp->pr_roflags & PR_NOTOUCH) != 0) |
return 0; |
return 0; |
|
|
for (pi = TAILQ_FIRST(&ph->ph_itemlist), n = 0; |
for (pi = LIST_FIRST(&ph->ph_itemlist), n = 0; |
pi != NULL; |
pi != NULL; |
pi = TAILQ_NEXT(pi,pi_list), n++) { |
pi = LIST_NEXT(pi,pi_list), n++) { |
|
|
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (pi->pi_magic != PI_MAGIC) { |
if (pi->pi_magic != PI_MAGIC) { |
if (label != NULL) |
if (label != NULL) |
printf("%s: ", label); |
printf("%s: ", label); |
printf("pool(%s): free list modified: magic=%x;" |
printf("pool(%s): free list modified: magic=%x;" |
" page %p; item ordinal %d;" |
" page %p; item ordinal %d; addr %p\n", |
" addr %p (p %p)\n", |
|
pp->pr_wchan, pi->pi_magic, ph->ph_page, |
pp->pr_wchan, pi->pi_magic, ph->ph_page, |
n, pi, page); |
n, pi); |
panic("pool"); |
panic("pool"); |
} |
} |
#endif |
#endif |
page = |
if ((pp->pr_roflags & PR_NOALIGN) != 0) { |
(caddr_t)((u_long)pi & pp->pr_alloc->pa_pagemask); |
continue; |
|
} |
|
page = (void *)((uintptr_t)pi & pp->pr_alloc->pa_pagemask); |
if (page == ph->ph_page) |
if (page == ph->ph_page) |
continue; |
continue; |
|
|
Line 1771 pool_chk(struct pool *pp, const char *la |
|
Line 1987 pool_chk(struct pool *pp, const char *la |
|
struct pool_item_header *ph; |
struct pool_item_header *ph; |
int r = 0; |
int r = 0; |
|
|
simple_lock(&pp->pr_slock); |
mutex_enter(&pp->pr_lock); |
LIST_FOREACH(ph, &pp->pr_emptypages, ph_pagelist) { |
LIST_FOREACH(ph, &pp->pr_emptypages, ph_pagelist) { |
r = pool_chk_page(pp, label, ph); |
r = pool_chk_page(pp, label, ph); |
if (r) { |
if (r) { |
Line 1792 pool_chk(struct pool *pp, const char *la |
|
Line 2008 pool_chk(struct pool *pp, const char *la |
|
} |
} |
|
|
out: |
out: |
simple_unlock(&pp->pr_slock); |
mutex_exit(&pp->pr_lock); |
return (r); |
return (r); |
} |
} |
|
|
|
|
* pool_cache_init: |
* pool_cache_init: |
* |
* |
* Initialize a pool cache. |
* 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: |
* |
* |
* NOTE: If the pool must be protected from interrupts, we expect |
* Kernel-private version of pool_cache_init(). The caller |
* to be called at the appropriate interrupt priority level. |
* provides initial storage. |
*/ |
*/ |
void |
void |
pool_cache_init(struct pool_cache *pc, struct pool *pp, |
pool_cache_bootstrap(pool_cache_t pc, size_t size, u_int align, |
int (*ctor)(void *, void *, int), |
u_int align_offset, u_int flags, const char *wchan, |
void (*dtor)(void *, void *), |
struct pool_allocator *palloc, int ipl, |
|
int (*ctor)(void *, void *, int), void (*dtor)(void *, void *), |
void *arg) |
void *arg) |
{ |
{ |
|
CPU_INFO_ITERATOR cii; |
|
pool_cache_t pc1; |
|
struct cpu_info *ci; |
|
struct pool *pp; |
|
|
TAILQ_INIT(&pc->pc_grouplist); |
pp = &pc->pc_pool; |
simple_lock_init(&pc->pc_slock); |
if (palloc == NULL && ipl == IPL_NONE) |
|
palloc = &pool_allocator_nointr; |
pc->pc_allocfrom = NULL; |
pool_init(pp, size, align, align_offset, flags, wchan, palloc, ipl); |
pc->pc_freeto = NULL; |
mutex_init(&pc->pc_lock, MUTEX_DEFAULT, ipl); |
pc->pc_pool = pp; |
|
|
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_ctor = ctor; |
pc->pc_dtor = dtor; |
pc->pc_dtor = dtor; |
pc->pc_arg = arg; |
pc->pc_arg = arg; |
|
pc->pc_hits = 0; |
pc->pc_hits = 0; |
|
pc->pc_misses = 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; |
|
} |
|
|
pc->pc_ngroups = 0; |
/* 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); |
|
} |
|
} |
|
|
pc->pc_nitems = 0; |
/* 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); |
|
|
simple_lock(&pp->pr_slock); |
membar_sync(); |
TAILQ_INSERT_TAIL(&pp->pr_cachelist, pc, pc_poollist); |
pp->pr_cache = pc; |
simple_unlock(&pp->pr_slock); |
|
} |
} |
|
|
/* |
/* |
Line 1840 pool_cache_init(struct pool_cache *pc, s |
|
Line 2124 pool_cache_init(struct pool_cache *pc, s |
|
* Destroy a pool cache. |
* Destroy a pool cache. |
*/ |
*/ |
void |
void |
pool_cache_destroy(struct pool_cache *pc) |
pool_cache_destroy(pool_cache_t pc) |
{ |
{ |
struct pool *pp = pc->pc_pool; |
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. */ |
/* First, invalidate the entire cache. */ |
pool_cache_invalidate(pc); |
pool_cache_invalidate(pc); |
|
|
/* ...and remove it from the pool's cache list. */ |
/* Disassociate it from the pool. */ |
simple_lock(&pp->pr_slock); |
mutex_enter(&pp->pr_lock); |
TAILQ_REMOVE(&pp->pr_cachelist, pc, pc_poollist); |
pp->pr_cache = NULL; |
simple_unlock(&pp->pr_slock); |
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); |
} |
} |
|
|
static __inline void * |
/* |
pcg_get(struct pool_cache_group *pcg, paddr_t *pap) |
* 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) |
{ |
{ |
void *object; |
pool_cache_cpu_t *cc; |
u_int idx; |
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 = &pcg_dummy; |
|
cc->cc_previous = &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; |
|
|
KASSERT(pcg->pcg_avail <= PCG_NOBJECTS); |
mutex_enter(&pool_head_lock); |
KASSERT(pcg->pcg_avail != 0); |
TAILQ_FOREACH(pc, &pool_cache_head, pc_cachelist) { |
idx = --pcg->pcg_avail; |
pc->pc_refcnt++; |
|
mutex_exit(&pool_head_lock); |
|
|
KASSERT(pcg->pcg_objects[idx].pcgo_va != NULL); |
pool_cache_cpu_init1(ci, pc); |
object = pcg->pcg_objects[idx].pcgo_va; |
|
if (pap != NULL) |
|
*pap = pcg->pcg_objects[idx].pcgo_pa; |
|
pcg->pcg_objects[idx].pcgo_va = NULL; |
|
|
|
return (object); |
mutex_enter(&pool_head_lock); |
|
pc->pc_refcnt--; |
|
cv_broadcast(&pool_busy); |
|
} |
|
mutex_exit(&pool_head_lock); |
} |
} |
|
|
static __inline void |
/* |
pcg_put(struct pool_cache_group *pcg, void *object, paddr_t pa) |
* pool_cache_reclaim: |
|
* |
|
* Reclaim memory from a pool cache. |
|
*/ |
|
bool |
|
pool_cache_reclaim(pool_cache_t pc) |
{ |
{ |
u_int idx; |
|
|
|
KASSERT(pcg->pcg_avail < PCG_NOBJECTS); |
return pool_reclaim(&pc->pc_pool); |
idx = pcg->pcg_avail++; |
} |
|
|
|
static void |
|
pool_cache_destruct_object1(pool_cache_t pc, void *object) |
|
{ |
|
|
KASSERT(pcg->pcg_objects[idx].pcgo_va == NULL); |
(*pc->pc_dtor)(pc->pc_arg, object); |
pcg->pcg_objects[idx].pcgo_va = object; |
pool_put(&pc->pc_pool, object); |
pcg->pcg_objects[idx].pcgo_pa = pa; |
|
} |
} |
|
|
/* |
/* |
* pool_cache_get{,_paddr}: |
* pool_cache_destruct_object: |
* |
* |
* Get an object from a pool cache (optionally returning |
* Force destruction of an object and its release back into |
* the physical address of the object). |
* the pool. |
*/ |
*/ |
void * |
void |
pool_cache_get_paddr(struct pool_cache *pc, int flags, paddr_t *pap) |
pool_cache_destruct_object(pool_cache_t pc, void *object) |
{ |
{ |
struct pool_cache_group *pcg; |
|
void *object; |
|
|
|
#ifdef LOCKDEBUG |
FREECHECK_IN(&pc->pc_freecheck, object); |
if (flags & PR_WAITOK) |
|
simple_lock_only_held(NULL, "pool_cache_get(PR_WAITOK)"); |
|
#endif |
|
|
|
simple_lock(&pc->pc_slock); |
pool_cache_destruct_object1(pc, object); |
|
} |
|
|
if ((pcg = pc->pc_allocfrom) == NULL) { |
/* |
TAILQ_FOREACH(pcg, &pc->pc_grouplist, pcg_list) { |
* pool_cache_invalidate_groups: |
if (pcg->pcg_avail != 0) { |
* |
pc->pc_allocfrom = pcg; |
* Invalidate a chain of groups and destruct all objects. |
goto have_group; |
*/ |
} |
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) { |
* No groups with any available objects. Allocate |
next = pcg->pcg_next; |
* a new object, construct it, and return it to |
|
* the caller. We will allocate a group, if necessary, |
for (i = 0; i < pcg->pcg_avail; i++) { |
* when the object is freed back to the cache. |
object = pcg->pcg_objects[i].pcgo_va; |
*/ |
pool_cache_destruct_object1(pc, object); |
pc->pc_misses++; |
|
simple_unlock(&pc->pc_slock); |
|
object = pool_get(pc->pc_pool, flags); |
|
if (object != NULL && pc->pc_ctor != NULL) { |
|
if ((*pc->pc_ctor)(pc->pc_arg, object, flags) != 0) { |
|
pool_put(pc->pc_pool, object); |
|
return (NULL); |
|
} |
|
} |
} |
if (object != NULL && pap != NULL) { |
|
#ifdef POOL_VTOPHYS |
if (pcg->pcg_size == PCG_NOBJECTS_LARGE) { |
*pap = POOL_VTOPHYS(object); |
pool_put(&pcg_large_pool, pcg); |
#else |
} else { |
*pap = POOL_PADDR_INVALID; |
KASSERT(pcg->pcg_size == PCG_NOBJECTS_NORMAL); |
#endif |
pool_put(&pcg_normal_pool, pcg); |
} |
} |
return (object); |
|
} |
} |
|
} |
|
|
have_group: |
/* |
pc->pc_hits++; |
* pool_cache_invalidate: |
pc->pc_nitems--; |
* |
object = pcg_get(pcg, pap); |
* 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); |
|
|
if (pcg->pcg_avail == 0) |
pool_cache_invalidate_groups(pc, full); |
pc->pc_allocfrom = NULL; |
pool_cache_invalidate_groups(pc, empty); |
|
pool_cache_invalidate_groups(pc, part); |
|
} |
|
|
simple_unlock(&pc->pc_slock); |
void |
|
pool_cache_set_drain_hook(pool_cache_t pc, void (*fn)(void *, int), void *arg) |
|
{ |
|
|
return (object); |
pool_set_drain_hook(&pc->pc_pool, fn, arg); |
} |
} |
|
|
/* |
|
* pool_cache_put{,_paddr}: |
|
* |
|
* Put an object back to the pool cache (optionally caching the |
|
* physical address of the object). |
|
*/ |
|
void |
void |
pool_cache_put_paddr(struct pool_cache *pc, void *object, paddr_t pa) |
pool_cache_setlowat(pool_cache_t pc, int n) |
{ |
{ |
struct pool_cache_group *pcg; |
|
int s; |
|
|
|
simple_lock(&pc->pc_slock); |
pool_setlowat(&pc->pc_pool, n); |
|
} |
|
|
if ((pcg = pc->pc_freeto) == NULL) { |
void |
TAILQ_FOREACH(pcg, &pc->pc_grouplist, pcg_list) { |
pool_cache_sethiwat(pool_cache_t pc, int n) |
if (pcg->pcg_avail != PCG_NOBJECTS) { |
{ |
pc->pc_freeto = pcg; |
|
goto have_group; |
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; |
|
|
|
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++; |
|
|
/* |
/* |
* No empty groups to free the object to. Attempt to |
* If we context switched while locking, then |
* allocate one. |
* our view of the per-CPU data is invalid: |
|
* retry. |
*/ |
*/ |
simple_unlock(&pc->pc_slock); |
if (curlwp->l_ncsw != ncsw) { |
s = splvm(); |
mutex_exit(&pc->pc_lock); |
pcg = pool_get(&pcgpool, PR_NOWAIT); |
return true; |
splx(s); |
|
if (pcg != NULL) { |
|
memset(pcg, 0, sizeof(*pcg)); |
|
simple_lock(&pc->pc_slock); |
|
pc->pc_ngroups++; |
|
TAILQ_INSERT_TAIL(&pc->pc_grouplist, pcg, pcg_list); |
|
if (pc->pc_freeto == NULL) |
|
pc->pc_freeto = pcg; |
|
goto have_group; |
|
} |
} |
|
} |
|
|
|
if (__predict_true((pcg = pc->pc_fullgroups) != NULL)) { |
/* |
/* |
* Unable to allocate a cache group; destruct the object |
* If there's a full group, release our empty |
* and free it back to the pool. |
* group back to the cache. Install the full |
|
* group as cc_current and return. |
*/ |
*/ |
pool_cache_destruct_object(pc, object); |
if (__predict_true((cur = cc->cc_current) != &pcg_dummy)) { |
return; |
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; |
} |
} |
|
|
have_group: |
/* |
pc->pc_nitems++; |
* Nothing available locally or in cache. Take the slow |
pcg_put(pcg, object, pa); |
* path: fetch a new object from the pool and construct |
|
* it. |
|
*/ |
|
pc->pc_misses++; |
|
mutex_exit(&pc->pc_lock); |
|
splx(s); |
|
|
if (pcg->pcg_avail == PCG_NOBJECTS) |
object = pool_get(&pc->pc_pool, flags); |
pc->pc_freeto = NULL; |
*objectp = object; |
|
if (__predict_false(object == NULL)) |
|
return false; |
|
|
simple_unlock(&pc->pc_slock); |
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) & |
* pool_cache_destruct_object: |
(pc->pc_pool.pr_align - 1)) == 0); |
* |
|
* Force destruction of an object and its release back into |
|
* the pool. |
|
*/ |
|
void |
|
pool_cache_destruct_object(struct pool_cache *pc, void *object) |
|
{ |
|
|
|
if (pc->pc_dtor != NULL) |
if (pap != NULL) { |
(*pc->pc_dtor)(pc->pc_arg, object); |
#ifdef POOL_VTOPHYS |
pool_put(pc->pc_pool, object); |
*pap = POOL_VTOPHYS(object); |
|
#else |
|
*pap = POOL_PADDR_INVALID; |
|
#endif |
|
} |
|
|
|
FREECHECK_OUT(&pc->pc_freecheck, object); |
|
return false; |
} |
} |
|
|
/* |
/* |
* pool_cache_do_invalidate: |
* pool_cache_get{,_paddr}: |
* |
* |
* This internal function implements pool_cache_invalidate() and |
* Get an object from a pool cache (optionally returning |
* pool_cache_reclaim(). |
* the physical address of the object). |
*/ |
*/ |
static void |
void * |
pool_cache_do_invalidate(struct pool_cache *pc, int free_groups, |
pool_cache_get_paddr(pool_cache_t pc, int flags, paddr_t *pap) |
void (*putit)(struct pool *, void *)) |
|
{ |
{ |
struct pool_cache_group *pcg, *npcg; |
pool_cache_cpu_t *cc; |
|
pcg_t *pcg; |
void *object; |
void *object; |
int s; |
int s; |
|
|
for (pcg = TAILQ_FIRST(&pc->pc_grouplist); pcg != NULL; |
#ifdef LOCKDEBUG |
pcg = npcg) { |
if (flags & PR_WAITOK) { |
npcg = TAILQ_NEXT(pcg, pcg_list); |
ASSERT_SLEEPABLE(); |
while (pcg->pcg_avail != 0) { |
} |
pc->pc_nitems--; |
#endif |
object = pcg_get(pcg, NULL); |
|
if (pcg->pcg_avail == 0 && pc->pc_allocfrom == pcg) |
/* Lock out interrupts and disable preemption. */ |
pc->pc_allocfrom = NULL; |
s = splvm(); |
if (pc->pc_dtor != NULL) |
while (/* CONSTCOND */ true) { |
(*pc->pc_dtor)(pc->pc_arg, object); |
/* Try and allocate an object from the current group. */ |
(*putit)(pc->pc_pool, object); |
cc = pc->pc_cpus[curcpu()->ci_index]; |
} |
KASSERT(cc->cc_cache == pc); |
if (free_groups) { |
pcg = cc->cc_current; |
pc->pc_ngroups--; |
if (__predict_true(pcg->pcg_avail > 0)) { |
TAILQ_REMOVE(&pc->pc_grouplist, pcg, pcg_list); |
object = pcg->pcg_objects[--pcg->pcg_avail].pcgo_va; |
if (pc->pc_freeto == pcg) |
if (__predict_false(pap != NULL)) |
pc->pc_freeto = NULL; |
*pap = pcg->pcg_objects[pcg->pcg_avail].pcgo_pa; |
s = splvm(); |
#if defined(DIAGNOSTIC) |
pool_put(&pcgpool, pcg); |
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); |
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; |
|
|
|
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_invalidate: |
* pool_cache_put{,_paddr}: |
* |
* |
* Invalidate a pool cache (destruct and release all of the |
* Put an object back to the pool cache (optionally caching the |
* cached objects). |
* physical address of the object). |
*/ |
*/ |
void |
void |
pool_cache_invalidate(struct pool_cache *pc) |
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; |
|
} |
|
|
simple_lock(&pc->pc_slock); |
/* |
pool_cache_do_invalidate(pc, 0, pool_put); |
* Can't free to either group: try the slow path. |
simple_unlock(&pc->pc_slock); |
* 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_reclaim: |
* pool_cache_xcall: |
* |
* |
* Reclaim a pool cache for pool_reclaim(). |
* Transfer objects from the per-CPU cache to the global cache. |
|
* Run within a cross-call thread. |
*/ |
*/ |
static void |
static void |
pool_cache_reclaim(struct pool_cache *pc) |
pool_cache_xcall(pool_cache_t pc) |
{ |
{ |
|
pool_cache_cpu_t *cc; |
|
pcg_t *prev, *cur, **list; |
|
int s; |
|
|
simple_lock(&pc->pc_slock); |
s = splvm(); |
pool_cache_do_invalidate(pc, 1, pool_do_put); |
mutex_enter(&pc->pc_lock); |
simple_unlock(&pc->pc_slock); |
cc = pc->pc_cpus[curcpu()->ci_index]; |
|
cur = cc->cc_current; |
|
cc->cc_current = &pcg_dummy; |
|
prev = cc->cc_previous; |
|
cc->cc_previous = &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); |
} |
} |
|
|
/* |
/* |
Line 2106 pool_cache_reclaim(struct pool_cache *pc |
|
Line 2709 pool_cache_reclaim(struct pool_cache *pc |
|
void *pool_page_alloc(struct pool *, int); |
void *pool_page_alloc(struct pool *, int); |
void pool_page_free(struct pool *, void *); |
void pool_page_free(struct pool *, void *); |
|
|
|
#ifdef POOL_SUBPAGE |
|
struct pool_allocator pool_allocator_kmem_fullpage = { |
|
pool_page_alloc, pool_page_free, 0, |
|
.pa_backingmapptr = &kmem_map, |
|
}; |
|
#else |
struct pool_allocator pool_allocator_kmem = { |
struct pool_allocator pool_allocator_kmem = { |
pool_page_alloc, pool_page_free, 0, |
pool_page_alloc, pool_page_free, 0, |
|
.pa_backingmapptr = &kmem_map, |
}; |
}; |
|
#endif |
|
|
void *pool_page_alloc_nointr(struct pool *, int); |
void *pool_page_alloc_nointr(struct pool *, int); |
void pool_page_free_nointr(struct pool *, void *); |
void pool_page_free_nointr(struct pool *, void *); |
|
|
|
#ifdef POOL_SUBPAGE |
|
struct pool_allocator pool_allocator_nointr_fullpage = { |
|
pool_page_alloc_nointr, pool_page_free_nointr, 0, |
|
.pa_backingmapptr = &kernel_map, |
|
}; |
|
#else |
struct pool_allocator pool_allocator_nointr = { |
struct pool_allocator pool_allocator_nointr = { |
pool_page_alloc_nointr, pool_page_free_nointr, 0, |
pool_page_alloc_nointr, pool_page_free_nointr, 0, |
|
.pa_backingmapptr = &kernel_map, |
}; |
}; |
|
#endif |
|
|
#ifdef POOL_SUBPAGE |
#ifdef POOL_SUBPAGE |
void *pool_subpage_alloc(struct pool *, int); |
void *pool_subpage_alloc(struct pool *, int); |
void pool_subpage_free(struct pool *, void *); |
void pool_subpage_free(struct pool *, void *); |
|
|
struct pool_allocator pool_allocator_kmem_subpage = { |
struct pool_allocator pool_allocator_kmem = { |
pool_subpage_alloc, pool_subpage_free, 0, |
pool_subpage_alloc, pool_subpage_free, POOL_SUBPAGE, |
|
.pa_backingmapptr = &kmem_map, |
|
}; |
|
|
|
void *pool_subpage_alloc_nointr(struct pool *, int); |
|
void pool_subpage_free_nointr(struct pool *, void *); |
|
|
|
struct pool_allocator pool_allocator_nointr = { |
|
pool_subpage_alloc, pool_subpage_free, POOL_SUBPAGE, |
|
.pa_backingmapptr = &kmem_map, |
}; |
}; |
#endif /* POOL_SUBPAGE */ |
#endif /* POOL_SUBPAGE */ |
|
|
/* |
static void * |
* We have at least three different resources for the same allocation and |
pool_allocator_alloc(struct pool *pp, int flags) |
* each resource can be depleted. First, we have the ready elements in the |
|
* pool. Then we have the resource (typically a vm_map) for this allocator. |
|
* Finally, we have physical memory. Waiting for any of these can be |
|
* unnecessary when any other is freed, but the kernel doesn't support |
|
* sleeping on multiple wait channels, so we have to employ another strategy. |
|
* |
|
* The caller sleeps on the pool (so that it can be awakened when an item |
|
* is returned to the pool), but we set PA_WANT on the allocator. When a |
|
* page is returned to the allocator and PA_WANT is set, pool_allocator_free |
|
* will wake up all sleeping pools belonging to this allocator. |
|
* |
|
* XXX Thundering herd. |
|
*/ |
|
void * |
|
pool_allocator_alloc(struct pool *org, int flags) |
|
{ |
{ |
struct pool_allocator *pa = org->pr_alloc; |
struct pool_allocator *pa = pp->pr_alloc; |
struct pool *pp, *start; |
|
int s, freed; |
|
void *res; |
void *res; |
|
|
LOCK_ASSERT(!simple_lock_held(&org->pr_slock)); |
res = (*pa->pa_alloc)(pp, flags); |
|
if (res == NULL && (flags & PR_WAITOK) == 0) { |
do { |
|
if ((res = (*pa->pa_alloc)(org, flags)) != NULL) |
|
return (res); |
|
if ((flags & PR_WAITOK) == 0) { |
|
/* |
|
* We only run the drain hookhere if PR_NOWAIT. |
|
* In other cases, the hook will be run in |
|
* pool_reclaim(). |
|
*/ |
|
if (org->pr_drain_hook != NULL) { |
|
(*org->pr_drain_hook)(org->pr_drain_hook_arg, |
|
flags); |
|
if ((res = (*pa->pa_alloc)(org, flags)) != NULL) |
|
return (res); |
|
} |
|
break; |
|
} |
|
|
|
/* |
/* |
* Drain all pools, except "org", that use this |
* We only run the drain hook here if PR_NOWAIT. |
* allocator. We do this to reclaim VA space. |
* In other cases, the hook will be run in |
* pa_alloc is responsible for waiting for |
* pool_reclaim(). |
* physical memory. |
|
* |
|
* XXX We risk looping forever if start if someone |
|
* calls pool_destroy on "start". But there is no |
|
* other way to have potentially sleeping pool_reclaim, |
|
* non-sleeping locks on pool_allocator, and some |
|
* stirring of drained pools in the allocator. |
|
* |
|
* XXX Maybe we should use pool_head_slock for locking |
|
* the allocators? |
|
*/ |
*/ |
freed = 0; |
if (pp->pr_drain_hook != NULL) { |
|
(*pp->pr_drain_hook)(pp->pr_drain_hook_arg, flags); |
s = splvm(); |
res = (*pa->pa_alloc)(pp, flags); |
simple_lock(&pa->pa_slock); |
|
pp = start = TAILQ_FIRST(&pa->pa_list); |
|
do { |
|
TAILQ_REMOVE(&pa->pa_list, pp, pr_alloc_list); |
|
TAILQ_INSERT_TAIL(&pa->pa_list, pp, pr_alloc_list); |
|
if (pp == org) |
|
continue; |
|
simple_unlock(&pa->pa_slock); |
|
freed = pool_reclaim(pp); |
|
simple_lock(&pa->pa_slock); |
|
} while ((pp = TAILQ_FIRST(&pa->pa_list)) != start && |
|
freed == 0); |
|
|
|
if (freed == 0) { |
|
/* |
|
* We set PA_WANT here, the caller will most likely |
|
* sleep waiting for pages (if not, this won't hurt |
|
* that much), and there is no way to set this in |
|
* the caller without violating locking order. |
|
*/ |
|
pa->pa_flags |= PA_WANT; |
|
} |
} |
simple_unlock(&pa->pa_slock); |
} |
splx(s); |
return res; |
} while (freed); |
|
return (NULL); |
|
} |
} |
|
|
void |
static void |
pool_allocator_free(struct pool *pp, void *v) |
pool_allocator_free(struct pool *pp, void *v) |
{ |
{ |
struct pool_allocator *pa = pp->pr_alloc; |
struct pool_allocator *pa = pp->pr_alloc; |
int s; |
|
|
|
LOCK_ASSERT(!simple_lock_held(&pp->pr_slock)); |
|
|
|
(*pa->pa_free)(pp, v); |
(*pa->pa_free)(pp, v); |
|
|
s = splvm(); |
|
simple_lock(&pa->pa_slock); |
|
if ((pa->pa_flags & PA_WANT) == 0) { |
|
simple_unlock(&pa->pa_slock); |
|
splx(s); |
|
return; |
|
} |
|
|
|
TAILQ_FOREACH(pp, &pa->pa_list, pr_alloc_list) { |
|
simple_lock(&pp->pr_slock); |
|
if ((pp->pr_flags & PR_WANTED) != 0) { |
|
pp->pr_flags &= ~PR_WANTED; |
|
wakeup(pp); |
|
} |
|
simple_unlock(&pp->pr_slock); |
|
} |
|
pa->pa_flags &= ~PA_WANT; |
|
simple_unlock(&pa->pa_slock); |
|
splx(s); |
|
} |
} |
|
|
void * |
void * |
pool_page_alloc(struct pool *pp, int flags) |
pool_page_alloc(struct pool *pp, int flags) |
{ |
{ |
boolean_t waitok = (flags & PR_WAITOK) ? TRUE : FALSE; |
bool waitok = (flags & PR_WAITOK) ? true : false; |
|
|
return ((void *) uvm_km_alloc_poolpage_cache(kmem_map, NULL, waitok)); |
return ((void *) uvm_km_alloc_poolpage_cache(kmem_map, waitok)); |
} |
} |
|
|
void |
void |
Line 2264 pool_page_free(struct pool *pp, void *v) |
|
Line 2801 pool_page_free(struct pool *pp, void *v) |
|
static void * |
static void * |
pool_page_alloc_meta(struct pool *pp, int flags) |
pool_page_alloc_meta(struct pool *pp, int flags) |
{ |
{ |
boolean_t waitok = (flags & PR_WAITOK) ? TRUE : FALSE; |
bool waitok = (flags & PR_WAITOK) ? true : false; |
|
|
return ((void *) uvm_km_alloc_poolpage1(kmem_map, NULL, waitok)); |
return ((void *) uvm_km_alloc_poolpage(kmem_map, waitok)); |
} |
} |
|
|
static void |
static void |
pool_page_free_meta(struct pool *pp, void *v) |
pool_page_free_meta(struct pool *pp, void *v) |
{ |
{ |
|
|
uvm_km_free_poolpage1(kmem_map, (vaddr_t) v); |
uvm_km_free_poolpage(kmem_map, (vaddr_t) v); |
} |
} |
|
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#ifdef POOL_SUBPAGE |
#ifdef POOL_SUBPAGE |
Line 2281 pool_page_free_meta(struct pool *pp, voi |
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Line 2818 pool_page_free_meta(struct pool *pp, voi |
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void * |
void * |
pool_subpage_alloc(struct pool *pp, int flags) |
pool_subpage_alloc(struct pool *pp, int flags) |
{ |
{ |
void *v; |
return pool_get(&psppool, flags); |
int s; |
|
s = splvm(); |
|
v = pool_get(&psppool, flags); |
|
splx(s); |
|
return v; |
|
} |
} |
|
|
void |
void |
pool_subpage_free(struct pool *pp, void *v) |
pool_subpage_free(struct pool *pp, void *v) |
{ |
{ |
int s; |
|
s = splvm(); |
|
pool_put(&psppool, v); |
pool_put(&psppool, v); |
splx(s); |
|
} |
} |
|
|
/* We don't provide a real nointr allocator. Maybe later. */ |
/* We don't provide a real nointr allocator. Maybe later. */ |
void * |
void * |
pool_page_alloc_nointr(struct pool *pp, int flags) |
pool_subpage_alloc_nointr(struct pool *pp, int flags) |
{ |
{ |
|
|
return (pool_subpage_alloc(pp, flags)); |
return (pool_subpage_alloc(pp, flags)); |
} |
} |
|
|
void |
void |
pool_page_free_nointr(struct pool *pp, void *v) |
pool_subpage_free_nointr(struct pool *pp, void *v) |
{ |
{ |
|
|
pool_subpage_free(pp, v); |
pool_subpage_free(pp, v); |
} |
} |
#else |
#endif /* POOL_SUBPAGE */ |
void * |
void * |
pool_page_alloc_nointr(struct pool *pp, int flags) |
pool_page_alloc_nointr(struct pool *pp, int flags) |
{ |
{ |
boolean_t waitok = (flags & PR_WAITOK) ? TRUE : FALSE; |
bool waitok = (flags & PR_WAITOK) ? true : false; |
|
|
return ((void *) uvm_km_alloc_poolpage_cache(kernel_map, |
return ((void *) uvm_km_alloc_poolpage_cache(kernel_map, waitok)); |
uvm.kernel_object, waitok)); |
|
} |
} |
|
|
void |
void |
Line 2328 pool_page_free_nointr(struct pool *pp, v |
|
Line 2856 pool_page_free_nointr(struct pool *pp, v |
|
|
|
uvm_km_free_poolpage_cache(kernel_map, (vaddr_t) v); |
uvm_km_free_poolpage_cache(kernel_map, (vaddr_t) v); |
} |
} |
#endif /* POOL_SUBPAGE */ |
|
|
#if defined(DDB) |
|
static bool |
|
pool_in_page(struct pool *pp, struct pool_item_header *ph, uintptr_t addr) |
|
{ |
|
|
|
return (uintptr_t)ph->ph_page <= addr && |
|
addr < (uintptr_t)ph->ph_page + pp->pr_alloc->pa_pagesz; |
|
} |
|
|
|
static bool |
|
pool_in_item(struct pool *pp, void *item, uintptr_t addr) |
|
{ |
|
|
|
return (uintptr_t)item <= addr && addr < (uintptr_t)item + pp->pr_size; |
|
} |
|
|
|
static bool |
|
pool_in_cg(struct pool *pp, struct pool_cache_group *pcg, uintptr_t addr) |
|
{ |
|
int i; |
|
|
|
if (pcg == NULL) { |
|
return false; |
|
} |
|
for (i = 0; i < pcg->pcg_avail; i++) { |
|
if (pool_in_item(pp, pcg->pcg_objects[i].pcgo_va, addr)) { |
|
return true; |
|
} |
|
} |
|
return false; |
|
} |
|
|
|
static bool |
|
pool_allocated(struct pool *pp, struct pool_item_header *ph, uintptr_t addr) |
|
{ |
|
|
|
if ((pp->pr_roflags & PR_NOTOUCH) != 0) { |
|
unsigned int idx = pr_item_notouch_index(pp, ph, (void *)addr); |
|
pool_item_bitmap_t *bitmap = |
|
ph->ph_bitmap + (idx / BITMAP_SIZE); |
|
pool_item_bitmap_t mask = 1 << (idx & BITMAP_MASK); |
|
|
|
return (*bitmap & mask) == 0; |
|
} else { |
|
struct pool_item *pi; |
|
|
|
LIST_FOREACH(pi, &ph->ph_itemlist, pi_list) { |
|
if (pool_in_item(pp, pi, addr)) { |
|
return false; |
|
} |
|
} |
|
return true; |
|
} |
|
} |
|
|
|
void |
|
pool_whatis(uintptr_t addr, void (*pr)(const char *, ...)) |
|
{ |
|
struct pool *pp; |
|
|
|
TAILQ_FOREACH(pp, &pool_head, pr_poollist) { |
|
struct pool_item_header *ph; |
|
uintptr_t item; |
|
bool allocated = true; |
|
bool incache = false; |
|
bool incpucache = false; |
|
char cpucachestr[32]; |
|
|
|
if ((pp->pr_roflags & PR_PHINPAGE) != 0) { |
|
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 = |
|
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; |
|
} else { |
|
ph = pr_find_pagehead_noalign(pp, (void *)addr); |
|
if (ph == NULL || !pool_in_page(pp, ph, addr)) { |
|
continue; |
|
} |
|
allocated = pool_allocated(pp, ph, addr); |
|
} |
|
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_byindex(i); |
|
|
|
incpucache = true; |
|
snprintf(cpucachestr, |
|
sizeof(cpucachestr), |
|
"cached by CPU %u", |
|
ci->ci_index); |
|
goto print; |
|
} |
|
} |
|
} |
|
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, |
|
incpucache ? cpucachestr : |
|
incache ? "cached" : allocated ? "allocated" : "free"); |
|
} |
|
} |
|
#endif /* defined(DDB) */ |