Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files. =================================================================== RCS file: /ftp/cvs/cvsroot/src/sys/kern/subr_pool.c,v rcsdiff: /ftp/cvs/cvsroot/src/sys/kern/subr_pool.c,v: warning: Unknown phrases like `commitid ...;' are present. retrieving revision 1.31 retrieving revision 1.125 diff -u -p -r1.31 -r1.125 --- src/sys/kern/subr_pool.c 2000/02/14 19:28:19 1.31 +++ src/sys/kern/subr_pool.c 2007/02/09 21:55:31 1.125 @@ -1,7 +1,7 @@ -/* $NetBSD: subr_pool.c,v 1.31 2000/02/14 19:28:19 thorpej Exp $ */ +/* $NetBSD: subr_pool.c,v 1.125 2007/02/09 21:55:31 ad Exp $ */ /*- - * Copyright (c) 1997, 1999 The NetBSD Foundation, Inc. + * Copyright (c) 1997, 1999, 2000, 2002 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation @@ -37,6 +37,9 @@ * POSSIBILITY OF SUCH DAMAGE. */ +#include +__KERNEL_RCSID(0, "$NetBSD: subr_pool.c,v 1.125 2007/02/09 21:55:31 ad Exp $"); + #include "opt_pool.h" #include "opt_poollog.h" #include "opt_lockdebug.h" @@ -50,28 +53,47 @@ #include #include #include - -#include -#include +#include #include /* * Pool resource management utility. * - * Memory is allocated in pages which are split into pieces according - * to the pool item size. Each page is kept on a list headed by `pr_pagelist' - * in the pool structure and the individual pool items are on a linked list - * headed by `ph_itemlist' in each page header. The memory for building - * the page list is either taken from the allocated pages themselves (for - * small pool items) or taken from an internal pool of page headers (`phpool'). + * Memory is allocated in pages which are split into pieces according to + * the pool item size. Each page is kept on one of three lists in the + * pool structure: `pr_emptypages', `pr_fullpages' and `pr_partpages', + * for empty, full and partially-full pages respectively. The individual + * pool items are on a linked list headed by `ph_itemlist' in each page + * header. The memory for building the page list is either taken from + * the allocated pages themselves (for small pool items) or taken from + * an internal pool of page headers (`phpool'). */ /* List of all pools */ -TAILQ_HEAD(,pool) pool_head = TAILQ_HEAD_INITIALIZER(pool_head); +LIST_HEAD(,pool) pool_head = LIST_HEAD_INITIALIZER(pool_head); /* Private pool for page header structures */ -static struct pool phpool; +#define PHPOOL_MAX 8 +static struct pool phpool[PHPOOL_MAX]; +#define PHPOOL_FREELIST_NELEM(idx) (((idx) == 0) ? 0 : (1 << (idx))) + +#ifdef POOL_SUBPAGE +/* Pool of subpages for use by normal pools. */ +static struct pool psppool; +#endif + +static SLIST_HEAD(, pool_allocator) pa_deferinitq = + SLIST_HEAD_INITIALIZER(pa_deferinitq); + +static void *pool_page_alloc_meta(struct pool *, int); +static void pool_page_free_meta(struct pool *, void *); + +/* allocator for pool metadata */ +static struct pool_allocator pool_allocator_meta = { + pool_page_alloc_meta, pool_page_free_meta, + .pa_backingmapptr = &kmem_map, +}; /* # of seconds to retain page after last use */ int pool_inactive_time = 10; @@ -82,46 +104,104 @@ static struct pool *drainpp; /* This spin lock protects both pool_head and drainpp. */ struct simplelock pool_head_slock = SIMPLELOCK_INITIALIZER; +typedef uint8_t pool_item_freelist_t; + struct pool_item_header { /* Page headers */ - TAILQ_ENTRY(pool_item_header) - ph_pagelist; /* pool page list */ - TAILQ_HEAD(,pool_item) ph_itemlist; /* chunk list for this page */ LIST_ENTRY(pool_item_header) - ph_hashlist; /* Off-page page headers */ - int ph_nmissing; /* # of chunks in use */ + ph_pagelist; /* pool page list */ + SPLAY_ENTRY(pool_item_header) + ph_node; /* Off-page page headers */ caddr_t ph_page; /* this page's address */ struct timeval ph_time; /* last referenced */ + union { + /* !PR_NOTOUCH */ + struct { + LIST_HEAD(, pool_item) + phu_itemlist; /* chunk list for this page */ + } phu_normal; + /* PR_NOTOUCH */ + struct { + uint16_t + phu_off; /* start offset in page */ + pool_item_freelist_t + phu_firstfree; /* first free item */ + /* + * XXX it might be better to use + * a simple bitmap and ffs(3) + */ + } phu_notouch; + } ph_u; + uint16_t ph_nmissing; /* # of chunks in use */ }; +#define ph_itemlist ph_u.phu_normal.phu_itemlist +#define ph_off ph_u.phu_notouch.phu_off +#define ph_firstfree ph_u.phu_notouch.phu_firstfree struct pool_item { #ifdef DIAGNOSTIC - int pi_magic; -#define PI_MAGIC 0xdeadbeef + u_int pi_magic; #endif +#define PI_MAGIC 0xdeadbeefU /* Other entries use only this list entry */ - TAILQ_ENTRY(pool_item) pi_list; + LIST_ENTRY(pool_item) pi_list; }; +#define POOL_NEEDS_CATCHUP(pp) \ + ((pp)->pr_nitems < (pp)->pr_minitems) -#define PR_HASH_INDEX(pp,addr) \ - (((u_long)(addr) >> (pp)->pr_pageshift) & (PR_HASHTABSIZE - 1)) - +/* + * Pool cache management. + * + * Pool caches provide a way for constructed objects to be cached by the + * pool subsystem. This can lead to performance improvements by avoiding + * needless object construction/destruction; it is deferred until absolutely + * necessary. + * + * Caches are grouped into cache groups. Each cache group references + * up to 16 constructed objects. When a cache allocates an object + * from the pool, it calls the object's constructor and places it into + * a cache group. When a cache group frees an object back to the pool, + * it first calls the object's destructor. This allows the object to + * persist in constructed form while freed to the cache. + * + * Multiple caches may exist for each pool. This allows a single + * object type to have multiple constructed forms. The pool references + * each cache, so that when a pool is drained by the pagedaemon, it can + * drain each individual cache as well. Each time a cache is drained, + * the most idle cache group is freed to the pool in its entirety. + * + * 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 + * from it. + */ +/* The cache group pool. */ +static struct pool pcgpool; -static struct pool_item_header - *pr_find_pagehead __P((struct pool *, caddr_t)); -static void pr_rmpage __P((struct pool *, struct pool_item_header *)); -static int pool_catchup __P((struct pool *)); -static void pool_prime_page __P((struct pool *, caddr_t)); -static void *pool_page_alloc __P((unsigned long, int, int)); -static void pool_page_free __P((void *, unsigned long, int)); +static void pool_cache_reclaim(struct pool_cache *, struct pool_pagelist *, + struct pool_cache_grouplist *); +static void pcg_grouplist_free(struct pool_cache_grouplist *); + +static int pool_catchup(struct pool *); +static void pool_prime_page(struct pool *, caddr_t, + struct pool_item_header *); +static void pool_update_curpage(struct pool *); + +static int pool_grow(struct pool *, int); +static void *pool_allocator_alloc(struct pool *, int); +static void pool_allocator_free(struct pool *, void *); + +static void pool_print_pagelist(struct pool *, struct pool_pagelist *, + void (*)(const char *, ...)); +static void pool_print1(struct pool *, const char *, + void (*)(const char *, ...)); -static void pool_print1 __P((struct pool *, const char *, - void (*)(const char *, ...))); +static int pool_chk_page(struct pool *, const char *, + struct pool_item_header *); /* - * Pool log entry. An array of these is allocated in pool_create(). + * Pool log entry. An array of these is allocated in pool_init(). */ struct pool_log { const char *pl_file; @@ -132,6 +212,7 @@ struct pool_log { void *pl_addr; }; +#ifdef POOL_DIAGNOSTIC /* Number of entries in pool log buffers */ #ifndef POOL_LOGSIZE #define POOL_LOGSIZE 10 @@ -139,22 +220,8 @@ struct pool_log { int pool_logsize = POOL_LOGSIZE; -#ifdef DIAGNOSTIC -static void pr_log __P((struct pool *, void *, int, const char *, long)); -static void pr_printlog __P((struct pool *, struct pool_item *, - void (*)(const char *, ...))); -static void pr_enter __P((struct pool *, const char *, long)); -static void pr_leave __P((struct pool *)); -static void pr_enter_check __P((struct pool *, - void (*)(const char *, ...))); - -static __inline__ void -pr_log(pp, v, action, file, line) - struct pool *pp; - void *v; - int action; - const char *file; - long line; +static inline void +pr_log(struct pool *pp, void *v, int action, const char *file, long line) { int n = pp->pr_curlogentry; struct pool_log *pl; @@ -177,10 +244,8 @@ pr_log(pp, v, action, file, line) } static void -pr_printlog(pp, pi, pr) - struct pool *pp; - struct pool_item *pi; - void (*pr) __P((const char *, ...)); +pr_printlog(struct pool *pp, struct pool_item *pi, + void (*pr)(const char *, ...)) { int i = pp->pr_logsize; int n = pp->pr_curlogentry; @@ -208,14 +273,11 @@ pr_printlog(pp, pi, pr) } } -static __inline__ void -pr_enter(pp, file, line) - struct pool *pp; - const char *file; - long line; +static inline void +pr_enter(struct pool *pp, const char *file, long line) { - if (pp->pr_entered_file != NULL) { + if (__predict_false(pp->pr_entered_file != NULL)) { printf("pool %s: reentrancy at file %s line %ld\n", pp->pr_wchan, file, line); printf(" previous entry at file %s line %ld\n", @@ -227,12 +289,11 @@ pr_enter(pp, file, line) pp->pr_entered_line = line; } -static __inline__ void -pr_leave(pp) - struct pool *pp; +static inline void +pr_leave(struct pool *pp) { - if (pp->pr_entered_file == NULL) { + if (__predict_false(pp->pr_entered_file == NULL)) { printf("pool %s not entered?\n", pp->pr_wchan); panic("pr_leave"); } @@ -241,10 +302,8 @@ pr_leave(pp) pp->pr_entered_line = 0; } -static __inline__ void -pr_enter_check(pp, pr) - struct pool *pp; - void (*pr) __P((const char *, ...)); +static inline void +pr_enter_check(struct pool *pp, void (*pr)(const char *, ...)) { if (pp->pr_entered_file != NULL) @@ -257,39 +316,135 @@ pr_enter_check(pp, pr) #define pr_enter(pp, file, line) #define pr_leave(pp) #define pr_enter_check(pp, pr) -#endif /* DIAGNOSTIC */ +#endif /* POOL_DIAGNOSTIC */ + +static inline int +pr_item_notouch_index(const struct pool *pp, const struct pool_item_header *ph, + const void *v) +{ + const char *cp = v; + int idx; + + KASSERT(pp->pr_roflags & PR_NOTOUCH); + idx = (cp - ph->ph_page - ph->ph_off) / pp->pr_size; + KASSERT(idx < pp->pr_itemsperpage); + return idx; +} + +#define PR_FREELIST_ALIGN(p) \ + roundup((uintptr_t)(p), sizeof(pool_item_freelist_t)) +#define PR_FREELIST(ph) ((pool_item_freelist_t *)PR_FREELIST_ALIGN((ph) + 1)) +#define PR_INDEX_USED ((pool_item_freelist_t)-1) +#define PR_INDEX_EOL ((pool_item_freelist_t)-2) + +static inline void +pr_item_notouch_put(const struct pool *pp, struct pool_item_header *ph, + void *obj) +{ + int idx = pr_item_notouch_index(pp, ph, obj); + pool_item_freelist_t *freelist = PR_FREELIST(ph); + + KASSERT(freelist[idx] == PR_INDEX_USED); + freelist[idx] = ph->ph_firstfree; + ph->ph_firstfree = idx; +} + +static inline void * +pr_item_notouch_get(const struct pool *pp, struct pool_item_header *ph) +{ + int idx = ph->ph_firstfree; + pool_item_freelist_t *freelist = PR_FREELIST(ph); + + KASSERT(freelist[idx] != PR_INDEX_USED); + ph->ph_firstfree = freelist[idx]; + freelist[idx] = PR_INDEX_USED; + + return ph->ph_page + ph->ph_off + idx * pp->pr_size; +} + +static inline int +phtree_compare(struct pool_item_header *a, struct pool_item_header *b) +{ + + /* + * we consider pool_item_header with smaller ph_page bigger. + * (this unnatural ordering is for the benefit of pr_find_pagehead.) + */ + + if (a->ph_page < b->ph_page) + return (1); + else if (a->ph_page > b->ph_page) + return (-1); + else + return (0); +} + +SPLAY_PROTOTYPE(phtree, pool_item_header, ph_node, phtree_compare); +SPLAY_GENERATE(phtree, pool_item_header, ph_node, phtree_compare); /* - * Return the pool page header based on page address. + * Return the pool page header based on item address. */ -static __inline__ struct pool_item_header * -pr_find_pagehead(pp, page) - struct pool *pp; - caddr_t page; +static inline struct pool_item_header * +pr_find_pagehead(struct pool *pp, void *v) { - struct pool_item_header *ph; + struct pool_item_header *ph, tmp; - if ((pp->pr_roflags & PR_PHINPAGE) != 0) - return ((struct pool_item_header *)(page + pp->pr_phoffset)); + if ((pp->pr_roflags & PR_NOALIGN) != 0) { + tmp.ph_page = (caddr_t)(uintptr_t)v; + ph = SPLAY_FIND(phtree, &pp->pr_phtree, &tmp); + if (ph == NULL) { + ph = SPLAY_ROOT(&pp->pr_phtree); + if (ph != NULL && phtree_compare(&tmp, ph) >= 0) { + ph = SPLAY_NEXT(phtree, &pp->pr_phtree, ph); + } + KASSERT(ph == NULL || phtree_compare(&tmp, ph) < 0); + } + } else { + caddr_t page = + (caddr_t)((uintptr_t)v & pp->pr_alloc->pa_pagemask); + + if ((pp->pr_roflags & PR_PHINPAGE) != 0) { + ph = (void *)(page + pp->pr_phoffset); + } else { + tmp.ph_page = page; + ph = SPLAY_FIND(phtree, &pp->pr_phtree, &tmp); + } + } + + KASSERT(ph == NULL || ((pp->pr_roflags & PR_PHINPAGE) != 0) || + (ph->ph_page <= (char *)v && + (char *)v < ph->ph_page + pp->pr_alloc->pa_pagesz)); + return ph; +} - for (ph = LIST_FIRST(&pp->pr_hashtab[PR_HASH_INDEX(pp, page)]); - ph != NULL; - ph = LIST_NEXT(ph, ph_hashlist)) { - if (ph->ph_page == page) - return (ph); +static void +pr_pagelist_free(struct pool *pp, struct pool_pagelist *pq) +{ + struct pool_item_header *ph; + int s; + + while ((ph = LIST_FIRST(pq)) != NULL) { + LIST_REMOVE(ph, ph_pagelist); + pool_allocator_free(pp, ph->ph_page); + if ((pp->pr_roflags & PR_PHINPAGE) == 0) { + s = splvm(); + pool_put(pp->pr_phpool, ph); + splx(s); + } } - return (NULL); } /* * Remove a page from the pool. */ -static __inline__ void -pr_rmpage(pp, ph) - struct pool *pp; - struct pool_item_header *ph; +static inline void +pr_rmpage(struct pool *pp, struct pool_item_header *ph, + struct pool_pagelist *pq) { + LOCK_ASSERT(simple_lock_held(&pp->pr_slock)); + /* * If the page was idle, decrement the idle page count. */ @@ -306,70 +461,113 @@ pr_rmpage(pp, ph) pp->pr_nitems -= pp->pr_itemsperpage; /* - * Unlink a page from the pool and release it. + * Unlink the page from the pool and queue it for release. */ - TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); - (*pp->pr_free)(ph->ph_page, pp->pr_pagesz, pp->pr_mtype); + LIST_REMOVE(ph, ph_pagelist); + if ((pp->pr_roflags & PR_PHINPAGE) == 0) + SPLAY_REMOVE(phtree, &pp->pr_phtree, ph); + LIST_INSERT_HEAD(pq, ph, ph_pagelist); + pp->pr_npages--; pp->pr_npagefree++; - if ((pp->pr_roflags & PR_PHINPAGE) == 0) { - int s; - LIST_REMOVE(ph, ph_hashlist); - s = splhigh(); - pool_put(&phpool, ph); - splx(s); + pool_update_curpage(pp); +} + +static boolean_t +pa_starved_p(struct pool_allocator *pa) +{ + + if (pa->pa_backingmap != NULL) { + return vm_map_starved_p(pa->pa_backingmap); } + return FALSE; +} - if (pp->pr_curpage == ph) { - /* - * Find a new non-empty page header, if any. - * Start search from the page head, to increase the - * chance for "high water" pages to be freed. - */ - for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; - ph = TAILQ_NEXT(ph, ph_pagelist)) - if (TAILQ_FIRST(&ph->ph_itemlist) != NULL) - break; +static int +pool_reclaim_callback(struct callback_entry *ce, void *obj, void *arg) +{ + struct pool *pp = obj; + struct pool_allocator *pa = pp->pr_alloc; - pp->pr_curpage = ph; + KASSERT(&pp->pr_reclaimerentry == ce); + pool_reclaim(pp); + if (!pa_starved_p(pa)) { + return CALLBACK_CHAIN_ABORT; } + return CALLBACK_CHAIN_CONTINUE; } -/* - * Allocate and initialize a pool. - */ -struct pool * -pool_create(size, align, ioff, nitems, wchan, pagesz, alloc, release, mtype) - size_t size; - u_int align; - u_int ioff; - int nitems; - const char *wchan; - size_t pagesz; - void *(*alloc) __P((unsigned long, int, int)); - void (*release) __P((void *, unsigned long, int)); - int mtype; +static void +pool_reclaim_register(struct pool *pp) { - struct pool *pp; - int flags; + struct vm_map *map = pp->pr_alloc->pa_backingmap; + int s; - pp = (struct pool *)malloc(sizeof(*pp), M_POOL, M_NOWAIT); - if (pp == NULL) - return (NULL); + if (map == NULL) { + return; + } - flags = PR_FREEHEADER; - pool_init(pp, size, align, ioff, flags, wchan, pagesz, - alloc, release, mtype); - - if (nitems != 0) { - if (pool_prime(pp, nitems, NULL) != 0) { - pool_destroy(pp); - return (NULL); - } + 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); } +} - return (pp); +/* + * Initialize all the pools listed in the "pools" link set. + */ +void +pool_subsystem_init(void) +{ + struct pool_allocator *pa; + __link_set_decl(pools, struct link_pool_init); + struct link_pool_init * const *pi; + + __link_set_foreach(pi, pools) + pool_init((*pi)->pp, (*pi)->size, (*pi)->align, + (*pi)->align_offset, (*pi)->flags, (*pi)->wchan, + (*pi)->palloc); + + 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); + } } /* @@ -379,19 +577,29 @@ pool_create(size, align, ioff, nitems, w * static pools that must be initialized before malloc() is available. */ void -pool_init(pp, size, align, ioff, flags, wchan, pagesz, alloc, release, mtype) - struct pool *pp; - size_t size; - u_int align; - u_int ioff; - int flags; - const char *wchan; - size_t pagesz; - void *(*alloc) __P((unsigned long, int, int)); - void (*release) __P((void *, unsigned long, int)); - int mtype; +pool_init(struct pool *pp, size_t size, u_int align, u_int ioff, int flags, + const char *wchan, struct pool_allocator *palloc) { - int off, slack, i; +#ifdef DEBUG + struct pool *pp1; +#endif + size_t trysize, phsize; + int off, slack, s; + + KASSERT((1UL << (CHAR_BIT * sizeof(pool_item_freelist_t))) - 2 >= + PHPOOL_FREELIST_NELEM(PHPOOL_MAX - 1)); + +#ifdef DEBUG + /* + * Check that the pool hasn't already been initialised and + * added to the list of all pools. + */ + LIST_FOREACH(pp1, &pool_head, pr_poollist) { + if (pp == pp1) + panic("pool_init: pool %s already initialised", + wchan); + } +#endif #ifdef POOL_DIAGNOSTIC /* @@ -401,34 +609,51 @@ pool_init(pp, size, align, ioff, flags, flags |= PR_LOGGING; #endif - /* - * Check arguments and construct default values. - */ - if (!powerof2(pagesz) || pagesz > PAGE_SIZE) - panic("pool_init: page size invalid (%lx)\n", (u_long)pagesz); + if (palloc == NULL) + palloc = &pool_allocator_kmem; +#ifdef POOL_SUBPAGE + if (size > palloc->pa_pagesz) { + if (palloc == &pool_allocator_kmem) + palloc = &pool_allocator_kmem_fullpage; + else if (palloc == &pool_allocator_nointr) + palloc = &pool_allocator_nointr_fullpage; + } +#endif /* POOL_SUBPAGE */ + if ((palloc->pa_flags & PA_INITIALIZED) == 0) { + if (palloc->pa_pagesz == 0) + palloc->pa_pagesz = PAGE_SIZE; + + TAILQ_INIT(&palloc->pa_list); + + simple_lock_init(&palloc->pa_slock); + palloc->pa_pagemask = ~(palloc->pa_pagesz - 1); + palloc->pa_pageshift = ffs(palloc->pa_pagesz) - 1; - if (alloc == NULL && release == NULL) { - alloc = pool_page_alloc; - release = pool_page_free; - pagesz = PAGE_SIZE; /* Rounds to PAGE_SIZE anyhow. */ - } else if ((alloc != NULL && release != NULL) == 0) { - /* If you specifiy one, must specify both. */ - panic("pool_init: must specify alloc and release together"); - } - - if (pagesz == 0) - pagesz = PAGE_SIZE; + if (palloc->pa_backingmapptr != NULL) { + pa_reclaim_register(palloc); + } + palloc->pa_flags |= PA_INITIALIZED; + } if (align == 0) 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 = roundup(size, align); +#ifdef DIAGNOSTIC + if (size > palloc->pa_pagesz) + panic("pool_init: pool item size (%zu) too large", size); +#endif + /* * Initialize the pool structure. */ - TAILQ_INIT(&pp->pr_pagelist); + LIST_INIT(&pp->pr_emptypages); + LIST_INIT(&pp->pr_fullpages); + LIST_INIT(&pp->pr_partpages); + LIST_INIT(&pp->pr_cachelist); pp->pr_curpage = NULL; pp->pr_npages = 0; pp->pr_minitems = 0; @@ -436,15 +661,10 @@ pool_init(pp, size, align, ioff, flags, pp->pr_maxpages = UINT_MAX; pp->pr_roflags = flags; pp->pr_flags = 0; - pp->pr_size = ALIGN(size); + pp->pr_size = size; pp->pr_align = align; pp->pr_wchan = wchan; - pp->pr_mtype = mtype; - pp->pr_alloc = alloc; - pp->pr_free = release; - pp->pr_pagesz = pagesz; - pp->pr_pagemask = ~(pagesz - 1); - pp->pr_pageshift = ffs(pagesz) - 1; + pp->pr_alloc = palloc; pp->pr_nitems = 0; pp->pr_nout = 0; pp->pr_hardlimit = UINT_MAX; @@ -453,37 +673,71 @@ pool_init(pp, size, align, ioff, flags, pp->pr_hardlimit_ratecap.tv_usec = 0; pp->pr_hardlimit_warning_last.tv_sec = 0; pp->pr_hardlimit_warning_last.tv_usec = 0; + pp->pr_drain_hook = NULL; + pp->pr_drain_hook_arg = NULL; + pp->pr_freecheck = NULL; /* * Decide whether to put the page header off page to avoid - * wasting too large a part of the page. Off-page page headers - * go on a hash table, so we can match a returned item - * with its header based on the page address. - * We use 1/16 of the page size as the threshold (XXX: tune) + * wasting too large a part of the page or too big item. + * Off-page page headers go on a hash table, so we can match + * a returned item with its header based on the page address. + * We use 1/16 of the page size and about 8 times of the item + * size as the threshold (XXX: tune) + * + * However, we'll put the header into the page if we can put + * it without wasting any items. + * + * Silently enforce `0 <= ioff < align'. */ - if (pp->pr_size < pagesz/16) { + pp->pr_itemoffset = ioff %= align; + /* See the comment below about reserved bytes. */ + trysize = palloc->pa_pagesz - ((align - ioff) % align); + phsize = ALIGN(sizeof(struct pool_item_header)); + if ((pp->pr_roflags & (PR_NOTOUCH | PR_NOALIGN)) == 0 && + (pp->pr_size < MIN(palloc->pa_pagesz / 16, phsize << 3) || + trysize / pp->pr_size == (trysize - phsize) / pp->pr_size)) { /* Use the end of the page for the page header */ pp->pr_roflags |= PR_PHINPAGE; - pp->pr_phoffset = off = - pagesz - ALIGN(sizeof(struct pool_item_header)); + pp->pr_phoffset = off = palloc->pa_pagesz - phsize; } else { /* The page header will be taken from our page header pool */ pp->pr_phoffset = 0; - off = pagesz; - for (i = 0; i < PR_HASHTABSIZE; i++) { - LIST_INIT(&pp->pr_hashtab[i]); - } + off = palloc->pa_pagesz; + SPLAY_INIT(&pp->pr_phtree); } /* * Alignment is to take place at `ioff' within the item. This means * we must reserve up to `align - 1' bytes on the page to allow * appropriate positioning of each item. - * - * Silently enforce `0 <= ioff < align'. */ - pp->pr_itemoffset = ioff = ioff % align; pp->pr_itemsperpage = (off - ((align - ioff) % align)) / pp->pr_size; + KASSERT(pp->pr_itemsperpage != 0); + if ((pp->pr_roflags & PR_NOTOUCH)) { + int idx; + + for (idx = 0; pp->pr_itemsperpage > PHPOOL_FREELIST_NELEM(idx); + idx++) { + /* nothing */ + } + if (idx >= PHPOOL_MAX) { + /* + * if you see this panic, consider to tweak + * PHPOOL_MAX and PHPOOL_FREELIST_NELEM. + */ + panic("%s: too large itemsperpage(%d) for PR_NOTOUCH", + pp->pr_wchan, pp->pr_itemsperpage); + } + pp->pr_phpool = &phpool[idx]; + } else if ((pp->pr_roflags & PR_PHINPAGE) == 0) { + pp->pr_phpool = &phpool[0]; + } +#if defined(DIAGNOSTIC) + else { + pp->pr_phpool = NULL; + } +#endif /* * Use the slack between the chunks and the page header @@ -501,6 +755,7 @@ pool_init(pp, size, align, ioff, flags, pp->pr_hiwat = 0; pp->pr_nidle = 0; +#ifdef POOL_DIAGNOSTIC if (flags & PR_LOGGING) { if (kmem_map == NULL || (pp->pr_log = malloc(pool_logsize * sizeof(struct pool_log), @@ -509,6 +764,7 @@ pool_init(pp, size, align, ioff, flags, pp->pr_curlogentry = 0; pp->pr_logsize = pool_logsize; } +#endif pp->pr_entered_file = NULL; pp->pr_entered_line = 0; @@ -516,80 +772,166 @@ pool_init(pp, size, align, ioff, flags, simple_lock_init(&pp->pr_slock); /* - * Initialize private page header pool if we haven't done so yet. + * Initialize private page header pool and cache magazine pool if we + * haven't done so yet. * XXX LOCKING. */ - if (phpool.pr_size == 0) { - pool_init(&phpool, sizeof(struct pool_item_header), 0, 0, - 0, "phpool", 0, 0, 0, 0); + if (phpool[0].pr_size == 0) { + int idx; + for (idx = 0; idx < PHPOOL_MAX; idx++) { + static char phpool_names[PHPOOL_MAX][6+1+6+1]; + int nelem; + size_t sz; + + nelem = PHPOOL_FREELIST_NELEM(idx); + snprintf(phpool_names[idx], sizeof(phpool_names[idx]), + "phpool-%d", nelem); + sz = sizeof(struct pool_item_header); + if (nelem) { + sz = PR_FREELIST_ALIGN(sz) + + nelem * sizeof(pool_item_freelist_t); + } + pool_init(&phpool[idx], sz, 0, 0, 0, + phpool_names[idx], &pool_allocator_meta); + } +#ifdef POOL_SUBPAGE + pool_init(&psppool, POOL_SUBPAGE, POOL_SUBPAGE, 0, + PR_RECURSIVE, "psppool", &pool_allocator_meta); +#endif + pool_init(&pcgpool, sizeof(struct pool_cache_group), 0, 0, + 0, "pcgpool", &pool_allocator_meta); } /* Insert into the list of all pools. */ simple_lock(&pool_head_slock); - TAILQ_INSERT_TAIL(&pool_head, pp, pr_poollist); + LIST_INSERT_HEAD(&pool_head, pp, pr_poollist); simple_unlock(&pool_head_slock); + + /* Insert this into the list of pools using this allocator. */ + s = splvm(); + simple_lock(&palloc->pa_slock); + TAILQ_INSERT_TAIL(&palloc->pa_list, pp, pr_alloc_list); + simple_unlock(&palloc->pa_slock); + splx(s); + pool_reclaim_register(pp); } /* * De-commision a pool resource. */ void -pool_destroy(pp) - struct pool *pp; +pool_destroy(struct pool *pp) { + struct pool_pagelist pq; struct pool_item_header *ph; + int s; + + /* Remove from global pool list */ + simple_lock(&pool_head_slock); + LIST_REMOVE(pp, pr_poollist); + if (drainpp == pp) + drainpp = NULL; + simple_unlock(&pool_head_slock); + + /* Remove this pool from its allocator's list of pools. */ + pool_reclaim_unregister(pp); + s = splvm(); + simple_lock(&pp->pr_alloc->pa_slock); + TAILQ_REMOVE(&pp->pr_alloc->pa_list, pp, pr_alloc_list); + simple_unlock(&pp->pr_alloc->pa_slock); + splx(s); + + s = splvm(); + simple_lock(&pp->pr_slock); + + KASSERT(LIST_EMPTY(&pp->pr_cachelist)); #ifdef DIAGNOSTIC if (pp->pr_nout != 0) { pr_printlog(pp, NULL, printf); - panic("pool_destroy: pool busy: still out: %u\n", + panic("pool_destroy: pool busy: still out: %u", pp->pr_nout); } #endif + KASSERT(LIST_EMPTY(&pp->pr_fullpages)); + KASSERT(LIST_EMPTY(&pp->pr_partpages)); + /* Remove all pages */ - if ((pp->pr_roflags & PR_STATIC) == 0) - while ((ph = pp->pr_pagelist.tqh_first) != NULL) - pr_rmpage(pp, ph); + LIST_INIT(&pq); + while ((ph = LIST_FIRST(&pp->pr_emptypages)) != NULL) + pr_rmpage(pp, ph, &pq); - /* Remove from global pool list */ - simple_lock(&pool_head_slock); - TAILQ_REMOVE(&pool_head, pp, pr_poollist); - /* XXX Only clear this if we were drainpp? */ - drainpp = NULL; - simple_unlock(&pool_head_slock); + simple_unlock(&pp->pr_slock); + splx(s); + pr_pagelist_free(pp, &pq); + +#ifdef POOL_DIAGNOSTIC if ((pp->pr_roflags & PR_LOGGING) != 0) free(pp->pr_log, M_TEMP); +#endif +} - if (pp->pr_roflags & PR_FREEHEADER) - free(pp, M_POOL); +void +pool_set_drain_hook(struct pool *pp, void (*fn)(void *, int), void *arg) +{ + + /* XXX no locking -- must be used just after pool_init() */ +#ifdef DIAGNOSTIC + if (pp->pr_drain_hook != NULL) + panic("pool_set_drain_hook(%s): already set", pp->pr_wchan); +#endif + pp->pr_drain_hook = fn; + pp->pr_drain_hook_arg = arg; } +static struct pool_item_header * +pool_alloc_item_header(struct pool *pp, caddr_t storage, int flags) +{ + struct pool_item_header *ph; + int s; + + LOCK_ASSERT(simple_lock_held(&pp->pr_slock) == 0); + + if ((pp->pr_roflags & PR_PHINPAGE) != 0) + ph = (struct pool_item_header *) (storage + pp->pr_phoffset); + else { + s = splvm(); + ph = pool_get(pp->pr_phpool, flags); + splx(s); + } + + return (ph); +} /* * Grab an item from the pool; must be called at appropriate spl level */ void * -_pool_get(pp, flags, file, line) - struct pool *pp; - int flags; - const char *file; - long line; +#ifdef POOL_DIAGNOSTIC +_pool_get(struct pool *pp, int flags, const char *file, long line) +#else +pool_get(struct pool *pp, int flags) +#endif { - void *v; struct pool_item *pi; struct pool_item_header *ph; + void *v; #ifdef DIAGNOSTIC - if ((pp->pr_roflags & PR_STATIC) && (flags & PR_MALLOCOK)) { - pr_printlog(pp, NULL, printf); - panic("pool_get: static"); - } -#endif + if (__predict_false(pp->pr_itemsperpage == 0)) + panic("pool_get: pool %p: pr_itemsperpage is zero, " + "pool not initialized?", pp); + if (__predict_false(curlwp == NULL && doing_shutdown == 0 && + (flags & PR_WAITOK) != 0)) + panic("pool_get: %s: must have NOWAIT", pp->pr_wchan); - if (curproc == NULL && (flags & PR_WAITOK) != 0) - panic("pool_get: must have NOWAIT"); +#endif /* DIAGNOSTIC */ +#ifdef LOCKDEBUG + if (flags & PR_WAITOK) + ASSERT_SLEEPABLE(NULL, "pool_get(PR_WAITOK)"); +#endif simple_lock(&pp->pr_slock); pr_enter(pp, file, line); @@ -601,13 +943,28 @@ _pool_get(pp, flags, file, line) * the pool. */ #ifdef DIAGNOSTIC - if (pp->pr_nout > pp->pr_hardlimit) { + if (__predict_false(pp->pr_nout > pp->pr_hardlimit)) { pr_leave(pp); simple_unlock(&pp->pr_slock); panic("pool_get: %s: crossed hard limit", pp->pr_wchan); } #endif - if (pp->pr_nout == pp->pr_hardlimit) { + if (__predict_false(pp->pr_nout == pp->pr_hardlimit)) { + if (pp->pr_drain_hook != NULL) { + /* + * Since the drain hook is going to free things + * back to the pool, unlock, call the hook, re-lock, + * and check the hardlimit condition again. + */ + pr_leave(pp); + simple_unlock(&pp->pr_slock); + (*pp->pr_drain_hook)(pp->pr_drain_hook_arg, flags); + simple_lock(&pp->pr_slock); + pr_enter(pp, file, line); + if (pp->pr_nout < pp->pr_hardlimit) + goto startover; + } + if ((flags & PR_WAITOK) && !(flags & PR_LIMITFAIL)) { /* * XXX: A warning isn't logged in this case. Should @@ -615,9 +972,7 @@ _pool_get(pp, flags, file, line) */ pp->pr_flags |= PR_WANTED; pr_leave(pp); - simple_unlock(&pp->pr_slock); - tsleep((caddr_t)pp, PSWP, pp->pr_wchan, 0); - simple_lock(&pp->pr_slock); + ltsleep(pp, PSWP, pp->pr_wchan, 0, &pp->pr_slock); pr_enter(pp, file, line); goto startover; } @@ -630,9 +985,6 @@ _pool_get(pp, flags, file, line) &pp->pr_hardlimit_ratecap)) log(LOG_ERR, "%s\n", pp->pr_hardlimit_warning); - if (flags & PR_URGENT) - panic("pool_get: urgent"); - pp->pr_nfail++; pr_leave(pp); @@ -647,14 +999,14 @@ _pool_get(pp, flags, file, line) * has no items in its bucket. */ if ((ph = pp->pr_curpage) == NULL) { - void *v; + int error; #ifdef DIAGNOSTIC if (pp->pr_nitems != 0) { simple_unlock(&pp->pr_slock); printf("pool_get: %s: curpage NULL, nitems %u\n", pp->pr_wchan, pp->pr_nitems); - panic("pool_get: nitems inconsistent\n"); + panic("pool_get: nitems inconsistent"); } #endif @@ -664,101 +1016,95 @@ _pool_get(pp, flags, file, line) * may block. */ pr_leave(pp); - simple_unlock(&pp->pr_slock); - v = (*pp->pr_alloc)(pp->pr_pagesz, flags, pp->pr_mtype); - simple_lock(&pp->pr_slock); + error = pool_grow(pp, flags); pr_enter(pp, file, line); - - if (v == NULL) { + if (error != 0) { /* - * We were unable to allocate a page, but - * we released the lock during allocation, - * so perhaps items were freed back to the - * pool. Check for this case. + * We were unable to allocate a page or item + * header, but we released the lock during + * allocation, so perhaps items were freed + * back to the pool. Check for this case. */ if (pp->pr_curpage != NULL) goto startover; - if (flags & PR_URGENT) - panic("pool_get: urgent"); - - if ((flags & PR_WAITOK) == 0) { - pp->pr_nfail++; - pr_leave(pp); - simple_unlock(&pp->pr_slock); - return (NULL); - } - - /* - * Wait for items to be returned to this pool. - * - * XXX: we actually want to wait just until - * the page allocator has memory again. Depending - * on this pool's usage, we might get stuck here - * for a long time. - * - * XXX: maybe we should wake up once a second and - * try again? - */ - pp->pr_flags |= PR_WANTED; + pp->pr_nfail++; pr_leave(pp); simple_unlock(&pp->pr_slock); - tsleep((caddr_t)pp, PSWP, pp->pr_wchan, 0); - simple_lock(&pp->pr_slock); - pr_enter(pp, file, line); - goto startover; + return (NULL); } - /* We have more memory; add it to the pool */ - pp->pr_npagealloc++; - pool_prime_page(pp, v); - /* Start the allocation process over. */ goto startover; } - - if ((v = pi = TAILQ_FIRST(&ph->ph_itemlist)) == NULL) { - pr_leave(pp); - simple_unlock(&pp->pr_slock); - panic("pool_get: %s: page empty", pp->pr_wchan); - } + if (pp->pr_roflags & PR_NOTOUCH) { #ifdef DIAGNOSTIC - if (pp->pr_nitems == 0) { - pr_leave(pp); - simple_unlock(&pp->pr_slock); - printf("pool_get: %s: items on itemlist, nitems %u\n", - pp->pr_wchan, pp->pr_nitems); - panic("pool_get: nitems inconsistent\n"); - } + if (__predict_false(ph->ph_nmissing == pp->pr_itemsperpage)) { + pr_leave(pp); + simple_unlock(&pp->pr_slock); + panic("pool_get: %s: page empty", pp->pr_wchan); + } #endif - pr_log(pp, v, PRLOG_GET, file, line); - + v = pr_item_notouch_get(pp, ph); +#ifdef POOL_DIAGNOSTIC + pr_log(pp, v, PRLOG_GET, file, line); +#endif + } else { + v = pi = LIST_FIRST(&ph->ph_itemlist); + if (__predict_false(v == NULL)) { + pr_leave(pp); + simple_unlock(&pp->pr_slock); + panic("pool_get: %s: page empty", pp->pr_wchan); + } #ifdef DIAGNOSTIC - if (pi->pi_magic != PI_MAGIC) { - pr_printlog(pp, pi, printf); - panic("pool_get(%s): free list modified: magic=%x; page %p;" - " item addr %p\n", - pp->pr_wchan, pi->pi_magic, ph->ph_page, pi); - } + if (__predict_false(pp->pr_nitems == 0)) { + pr_leave(pp); + simple_unlock(&pp->pr_slock); + printf("pool_get: %s: items on itemlist, nitems %u\n", + pp->pr_wchan, pp->pr_nitems); + panic("pool_get: nitems inconsistent"); + } #endif - /* - * Remove from item list. - */ - TAILQ_REMOVE(&ph->ph_itemlist, pi, pi_list); - pp->pr_nitems--; - pp->pr_nout++; +#ifdef POOL_DIAGNOSTIC + pr_log(pp, v, PRLOG_GET, file, line); +#endif + +#ifdef DIAGNOSTIC + if (__predict_false(pi->pi_magic != PI_MAGIC)) { + pr_printlog(pp, pi, printf); + panic("pool_get(%s): free list modified: " + "magic=%x; page %p; item addr %p\n", + pp->pr_wchan, pi->pi_magic, ph->ph_page, pi); + } +#endif + + /* + * Remove from item list. + */ + LIST_REMOVE(pi, pi_list); + } + pp->pr_nitems--; + pp->pr_nout++; if (ph->ph_nmissing == 0) { #ifdef DIAGNOSTIC - if (pp->pr_nidle == 0) + if (__predict_false(pp->pr_nidle == 0)) panic("pool_get: nidle inconsistent"); #endif pp->pr_nidle--; + + /* + * This page was previously empty. Move it to the list of + * partially-full pages. This page is already curpage. + */ + LIST_REMOVE(ph, ph_pagelist); + LIST_INSERT_HEAD(&pp->pr_partpages, ph, ph_pagelist); } ph->ph_nmissing++; - if (TAILQ_FIRST(&ph->ph_itemlist) == NULL) { + if (ph->ph_nmissing == pp->pr_itemsperpage) { #ifdef DIAGNOSTIC - if (ph->ph_nmissing != pp->pr_itemsperpage) { + if (__predict_false((pp->pr_roflags & PR_NOTOUCH) == 0 && + !LIST_EMPTY(&ph->ph_itemlist))) { pr_leave(pp); simple_unlock(&pp->pr_slock); panic("pool_get: %s: nmissing inconsistent", @@ -766,33 +1112,22 @@ _pool_get(pp, flags, file, line) } #endif /* - * Find a new non-empty page header, if any. - * Start search from the page head, to increase - * the chance for "high water" pages to be freed. - * - * Migrate empty pages to the end of the list. This - * will speed the update of curpage as pages become - * idle. Empty pages intermingled with idle pages - * is no big deal. As soon as a page becomes un-empty, - * it will move back to the head of the list. + * This page is now full. Move it to the full list + * and select a new current page. */ - TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); - TAILQ_INSERT_TAIL(&pp->pr_pagelist, ph, ph_pagelist); - for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; - ph = TAILQ_NEXT(ph, ph_pagelist)) - if (TAILQ_FIRST(&ph->ph_itemlist) != NULL) - break; - - pp->pr_curpage = ph; + LIST_REMOVE(ph, ph_pagelist); + LIST_INSERT_HEAD(&pp->pr_fullpages, ph, ph_pagelist); + pool_update_curpage(pp); } pp->pr_nget++; + pr_leave(pp); /* * If we have a low water mark and we are now below that low * water mark, add more items to the pool. */ - if (pp->pr_nitems < pp->pr_minitems && pool_catchup(pp) != 0) { + if (POOL_NEEDS_CATCHUP(pp) && pool_catchup(pp) != 0) { /* * XXX: Should we log a warning? Should we set up a timeout * to try again in a second or so? The latter could break @@ -800,42 +1135,33 @@ _pool_get(pp, flags, file, line) */ } - pr_leave(pp); 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 resource to the pool; must be called at appropriate spl level + * Internal version of pool_put(). Pool is already locked/entered. */ -void -_pool_put(pp, v, file, line) - struct pool *pp; - void *v; - const char *file; - long line; +static void +pool_do_put(struct pool *pp, void *v, struct pool_pagelist *pq) { struct pool_item *pi = v; struct pool_item_header *ph; - caddr_t page; - int s; - - page = (caddr_t)((u_long)v & pp->pr_pagemask); - simple_lock(&pp->pr_slock); - pr_enter(pp, file, line); + LOCK_ASSERT(simple_lock_held(&pp->pr_slock)); + FREECHECK_IN(&pp->pr_freecheck, v); #ifdef DIAGNOSTIC - if (pp->pr_nout == 0) { + if (__predict_false(pp->pr_nout == 0)) { printf("pool %s: putting with none out\n", pp->pr_wchan); panic("pool_put"); } #endif - pr_log(pp, v, PRLOG_PUT, file, line); - - if ((ph = pr_find_pagehead(pp, page)) == NULL) { + if (__predict_false((ph = pr_find_pagehead(pp, v)) == NULL)) { pr_printlog(pp, NULL, printf); panic("pool_put: %s: page header missing", pp->pr_wchan); } @@ -850,11 +1176,25 @@ _pool_put(pp, v, file, line) /* * Return to item list. */ + if (pp->pr_roflags & PR_NOTOUCH) { + pr_item_notouch_put(pp, ph, v); + } else { #ifdef DIAGNOSTIC - /* XXX Should fill the item. */ - pi->pi_magic = PI_MAGIC; + pi->pi_magic = PI_MAGIC; +#endif +#ifdef DEBUG + { + int i, *ip = v; + + for (i = 0; i < pp->pr_size / sizeof(int); i++) { + *ip++ = PI_MAGIC; + } + } #endif - TAILQ_INSERT_HEAD(&ph->ph_itemlist, pi, pi_list); + + LIST_INSERT_HEAD(&ph->ph_itemlist, pi, pi_list); + } + KDASSERT(ph->ph_nmissing != 0); ph->ph_nmissing--; pp->pr_nput++; pp->pr_nitems++; @@ -868,33 +1208,32 @@ _pool_put(pp, v, file, line) pp->pr_flags &= ~PR_WANTED; if (ph->ph_nmissing == 0) pp->pr_nidle++; - pr_leave(pp); - simple_unlock(&pp->pr_slock); wakeup((caddr_t)pp); return; } /* - * If this page is now complete, do one of two things: + * If this page is now empty, do one of two things: * - * (1) If we have more pages than the page high water - * mark, free the page back to the system. + * (1) If we have more pages than the page high water mark, + * free the page back to the system. ONLY CONSIDER + * FREEING BACK A PAGE IF WE HAVE MORE THAN OUR MINIMUM PAGE + * CLAIM. * - * (2) Move it to the end of the page list, so that - * we minimize our chances of fragmenting the - * pool. Idle pages migrate to the end (along with - * completely empty pages, so that we find un-empty - * pages more quickly when we update curpage) of the - * list so they can be more easily swept up by - * the pagedaemon when pages are scarce. + * (2) Otherwise, move the page to the empty page list. + * + * Either way, select a new current page (so we use a partially-full + * page if one is available). */ if (ph->ph_nmissing == 0) { pp->pr_nidle++; - if (pp->pr_npages > pp->pr_maxpages) { - pr_rmpage(pp, ph); + if (pp->pr_npages > pp->pr_minpages && + (pp->pr_npages > pp->pr_maxpages || + pa_starved_p(pp->pr_alloc))) { + pr_rmpage(pp, ph, pq); } else { - TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); - TAILQ_INSERT_TAIL(&pp->pr_pagelist, ph, ph_pagelist); + LIST_REMOVE(ph, ph_pagelist); + LIST_INSERT_HEAD(&pp->pr_emptypages, ph, ph_pagelist); /* * Update the timestamp on the page. A page must @@ -902,95 +1241,127 @@ _pool_put(pp, v, file, line) * be reclaimed by the pagedaemon. This minimizes * ping-pong'ing for memory. */ - s = splclock(); - ph->ph_time = mono_time; - splx(s); - - /* - * Update the current page pointer. Just look for - * the first page with any free items. - * - * XXX: Maybe we want an option to look for the - * page with the fewest available items, to minimize - * fragmentation? - */ - for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; - ph = TAILQ_NEXT(ph, ph_pagelist)) - if (TAILQ_FIRST(&ph->ph_itemlist) != NULL) - break; - - pp->pr_curpage = ph; + getmicrotime(&ph->ph_time); } + pool_update_curpage(pp); } + /* - * If the page has just become un-empty, move it to the head of - * the list, and make it the current page. The next allocation - * will get the item from this page, instead of further fragmenting - * the pool. + * If the page was previously completely full, move it to the + * partially-full list and make it the current page. The next + * allocation will get the item from this page, instead of + * further fragmenting the pool. */ else if (ph->ph_nmissing == (pp->pr_itemsperpage - 1)) { - TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); - TAILQ_INSERT_HEAD(&pp->pr_pagelist, ph, ph_pagelist); + LIST_REMOVE(ph, ph_pagelist); + LIST_INSERT_HEAD(&pp->pr_partpages, ph, ph_pagelist); pp->pr_curpage = ph; } +} + +/* + * Return resource to the pool; must be called at appropriate spl level + */ +#ifdef POOL_DIAGNOSTIC +void +_pool_put(struct pool *pp, void *v, const char *file, long line) +{ + struct pool_pagelist pq; + + LIST_INIT(&pq); + + simple_lock(&pp->pr_slock); + pr_enter(pp, file, line); + + pr_log(pp, v, PRLOG_PUT, file, line); + + pool_do_put(pp, v, &pq); pr_leave(pp); simple_unlock(&pp->pr_slock); + pr_pagelist_free(pp, &pq); +} +#undef pool_put +#endif /* POOL_DIAGNOSTIC */ + +void +pool_put(struct pool *pp, void *v) +{ + struct pool_pagelist pq; + + LIST_INIT(&pq); + + simple_lock(&pp->pr_slock); + pool_do_put(pp, v, &pq); + simple_unlock(&pp->pr_slock); + + pr_pagelist_free(pp, &pq); +} + +#ifdef POOL_DIAGNOSTIC +#define pool_put(h, v) _pool_put((h), (v), __FILE__, __LINE__) +#endif + +/* + * pool_grow: grow a pool by a page. + * + * => called with pool locked. + * => unlock and relock the pool. + * => return with pool locked. + */ + +static int +pool_grow(struct pool *pp, int flags) +{ + struct pool_item_header *ph = NULL; + char *cp; + + simple_unlock(&pp->pr_slock); + 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); + } + simple_lock(&pp->pr_slock); + return ENOMEM; + } + + simple_lock(&pp->pr_slock); + pool_prime_page(pp, cp, ph); + pp->pr_npagealloc++; + return 0; } /* * Add N items to the pool. */ int -pool_prime(pp, n, storage) - struct pool *pp; - int n; - caddr_t storage; +pool_prime(struct pool *pp, int n) { - caddr_t cp; - int newnitems, newpages; - -#ifdef DIAGNOSTIC - if (storage && !(pp->pr_roflags & PR_STATIC)) - panic("pool_prime: static"); - /* !storage && static caught below */ -#endif + int newpages; + int error = 0; simple_lock(&pp->pr_slock); - newnitems = pp->pr_minitems + n; - newpages = - roundup(newnitems, pp->pr_itemsperpage) / pp->pr_itemsperpage - - pp->pr_minpages; + newpages = roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; while (newpages-- > 0) { - if (pp->pr_roflags & PR_STATIC) { - cp = storage; - storage += pp->pr_pagesz; - } else { - simple_unlock(&pp->pr_slock); - cp = (*pp->pr_alloc)(pp->pr_pagesz, 0, pp->pr_mtype); - simple_lock(&pp->pr_slock); - } - - if (cp == NULL) { - simple_unlock(&pp->pr_slock); - return (ENOMEM); + error = pool_grow(pp, PR_NOWAIT); + if (error) { + break; } - - pp->pr_npagealloc++; - pool_prime_page(pp, cp); pp->pr_minpages++; } - pp->pr_minitems = newnitems; - if (pp->pr_minpages >= pp->pr_maxpages) pp->pr_maxpages = pp->pr_minpages + 1; /* XXX */ simple_unlock(&pp->pr_slock); - return (0); + return error; } /* @@ -999,35 +1370,32 @@ pool_prime(pp, n, storage) * Note, we must be called with the pool descriptor LOCKED. */ static void -pool_prime_page(pp, storage) - struct pool *pp; - caddr_t storage; +pool_prime_page(struct pool *pp, caddr_t storage, struct pool_item_header *ph) { struct pool_item *pi; - struct pool_item_header *ph; caddr_t cp = storage; - unsigned int align = pp->pr_align; - unsigned int ioff = pp->pr_itemoffset; - int s, n; + const unsigned int align = pp->pr_align; + const unsigned int ioff = pp->pr_itemoffset; + int n; - if ((pp->pr_roflags & PR_PHINPAGE) != 0) { - ph = (struct pool_item_header *)(cp + pp->pr_phoffset); - } else { - s = splhigh(); - ph = pool_get(&phpool, PR_URGENT); - splx(s); - LIST_INSERT_HEAD(&pp->pr_hashtab[PR_HASH_INDEX(pp, cp)], - ph, ph_hashlist); - } + LOCK_ASSERT(simple_lock_held(&pp->pr_slock)); + +#ifdef DIAGNOSTIC + if ((pp->pr_roflags & PR_NOALIGN) == 0 && + ((uintptr_t)cp & (pp->pr_alloc->pa_pagesz - 1)) != 0) + panic("pool_prime_page: %s: unaligned page", pp->pr_wchan); +#endif /* * Insert page header. */ - TAILQ_INSERT_HEAD(&pp->pr_pagelist, ph, ph_pagelist); - TAILQ_INIT(&ph->ph_itemlist); + LIST_INSERT_HEAD(&pp->pr_emptypages, ph, ph_pagelist); + LIST_INIT(&ph->ph_itemlist); ph->ph_page = storage; ph->ph_nmissing = 0; - memset(&ph->ph_time, 0, sizeof(ph->ph_time)); + getmicrotime(&ph->ph_time); + if ((pp->pr_roflags & PR_PHINPAGE) == 0) + SPLAY_INSERT(phtree, &pp->pr_phtree, ph); pp->pr_nidle++; @@ -1044,21 +1412,38 @@ pool_prime_page(pp, storage) if (ioff != 0) cp = (caddr_t)(cp + (align - ioff)); + KASSERT((((vaddr_t)cp + ioff) & (align - 1)) == 0); + /* * Insert remaining chunks on the bucket list. */ n = pp->pr_itemsperpage; pp->pr_nitems += n; - while (n--) { - pi = (struct pool_item *)cp; + if (pp->pr_roflags & PR_NOTOUCH) { + pool_item_freelist_t *freelist = PR_FREELIST(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 { + while (n--) { + pi = (struct pool_item *)cp; + + KASSERT(((((vaddr_t)pi) + ioff) & (align - 1)) == 0); - /* Insert on page list */ - TAILQ_INSERT_TAIL(&ph->ph_itemlist, pi, pi_list); + /* Insert on page list */ + LIST_INSERT_HEAD(&ph->ph_itemlist, pi, pi_list); #ifdef DIAGNOSTIC - pi->pi_magic = PI_MAGIC; + pi->pi_magic = PI_MAGIC; #endif - cp = (caddr_t)(cp + pp->pr_size); + cp = (caddr_t)(cp + pp->pr_size); + + KASSERT((((vaddr_t)cp + ioff) & (align - 1)) == 0); + } } /* @@ -1072,63 +1457,41 @@ pool_prime_page(pp, storage) } /* - * Like pool_prime(), except this is used by pool_get() when nitems - * drops below the low water mark. This is used to catch up nitmes - * with the low water mark. + * Used by pool_get() when nitems drops below the low water mark. This + * is used to catch up pr_nitems with the low water mark. * * Note 1, we never wait for memory here, we let the caller decide what to do. * - * Note 2, this doesn't work with static pools. - * - * Note 3, we must be called with the pool already locked, and we return + * Note 2, we must be called with the pool already locked, and we return * with it locked. */ static int -pool_catchup(pp) - struct pool *pp; +pool_catchup(struct pool *pp) { - caddr_t cp; int error = 0; - if (pp->pr_roflags & PR_STATIC) { - /* - * We dropped below the low water mark, and this is not a - * good thing. Log a warning. - * - * XXX: rate-limit this? - */ - printf("WARNING: static pool `%s' dropped below low water " - "mark\n", pp->pr_wchan); - return (0); - } - - while (pp->pr_nitems < pp->pr_minitems) { - /* - * Call the page back-end allocator for more memory. - * - * XXX: We never wait, so should we bother unlocking - * the pool descriptor? - */ - simple_unlock(&pp->pr_slock); - cp = (*pp->pr_alloc)(pp->pr_pagesz, 0, pp->pr_mtype); - simple_lock(&pp->pr_slock); - if (cp == NULL) { - error = ENOMEM; + while (POOL_NEEDS_CATCHUP(pp)) { + error = pool_grow(pp, PR_NOWAIT); + if (error) { break; } - pp->pr_npagealloc++; - pool_prime_page(pp, cp); } + return error; +} + +static void +pool_update_curpage(struct pool *pp) +{ - return (error); + pp->pr_curpage = LIST_FIRST(&pp->pr_partpages); + if (pp->pr_curpage == NULL) { + pp->pr_curpage = LIST_FIRST(&pp->pr_emptypages); + } } void -pool_setlowat(pp, n) - pool_handle_t pp; - int n; +pool_setlowat(struct pool *pp, int n) { - int error; simple_lock(&pp->pr_slock); @@ -1138,7 +1501,7 @@ pool_setlowat(pp, n) : roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; /* Make sure we're caught up with the newly-set low water mark. */ - if ((error = pool_catchup(pp)) != 0) { + if (POOL_NEEDS_CATCHUP(pp) && pool_catchup(pp) != 0) { /* * XXX: Should we log a warning? Should we set up a timeout * to try again in a second or so? The latter could break @@ -1150,9 +1513,7 @@ pool_setlowat(pp, n) } void -pool_sethiwat(pp, n) - pool_handle_t pp; - int n; +pool_sethiwat(struct pool *pp, int n) { simple_lock(&pp->pr_slock); @@ -1165,11 +1526,7 @@ pool_sethiwat(pp, n) } void -pool_sethardlimit(pp, n, warnmess, ratecap) - pool_handle_t 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); @@ -1192,109 +1549,76 @@ pool_sethardlimit(pp, n, warnmess, ratec } /* - * Default page allocator. - */ -static void * -pool_page_alloc(sz, flags, mtype) - unsigned long sz; - int flags; - int mtype; -{ - boolean_t waitok = (flags & PR_WAITOK) ? TRUE : FALSE; - - return ((void *)uvm_km_alloc_poolpage(waitok)); -} - -static void -pool_page_free(v, sz, mtype) - void *v; - unsigned long sz; - int mtype; -{ - - uvm_km_free_poolpage((vaddr_t)v); -} - -/* - * Alternate pool page allocator for pools that know they will - * never be accessed in interrupt context. - */ -void * -pool_page_alloc_nointr(sz, flags, mtype) - unsigned long sz; - int flags; - int mtype; -{ - boolean_t waitok = (flags & PR_WAITOK) ? TRUE : FALSE; - - return ((void *)uvm_km_alloc_poolpage1(kernel_map, uvm.kernel_object, - waitok)); -} - -void -pool_page_free_nointr(v, sz, mtype) - void *v; - unsigned long sz; - int mtype; -{ - - uvm_km_free_poolpage1(kernel_map, (vaddr_t)v); -} - - -/* * Release all complete pages that have not been used recently. */ -void -_pool_reclaim(pp, file, line) - pool_handle_t pp; - const char *file; - long line; +int +#ifdef POOL_DIAGNOSTIC +_pool_reclaim(struct pool *pp, const char *file, long line) +#else +pool_reclaim(struct pool *pp) +#endif { struct pool_item_header *ph, *phnext; - struct timeval curtime; - int s; + struct pool_cache *pc; + struct pool_pagelist pq; + struct pool_cache_grouplist pcgl; + struct timeval curtime, diff; - if (pp->pr_roflags & PR_STATIC) - return; + if (pp->pr_drain_hook != NULL) { + /* + * The drain hook must be called with the pool unlocked. + */ + (*pp->pr_drain_hook)(pp->pr_drain_hook_arg, PR_NOWAIT); + } if (simple_lock_try(&pp->pr_slock) == 0) - return; + return (0); pr_enter(pp, file, line); - s = splclock(); - curtime = mono_time; - splx(s); + LIST_INIT(&pq); + LIST_INIT(&pcgl); + + /* + * Reclaim items from the pool's caches. + */ + LIST_FOREACH(pc, &pp->pr_cachelist, pc_poollist) + pool_cache_reclaim(pc, &pq, &pcgl); - for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; ph = phnext) { - phnext = TAILQ_NEXT(ph, ph_pagelist); + getmicrotime(&curtime); + + for (ph = LIST_FIRST(&pp->pr_emptypages); ph != NULL; ph = phnext) { + phnext = LIST_NEXT(ph, ph_pagelist); /* Check our minimum page claim */ if (pp->pr_npages <= pp->pr_minpages) break; - if (ph->ph_nmissing == 0) { - struct timeval diff; - timersub(&curtime, &ph->ph_time, &diff); - if (diff.tv_sec < pool_inactive_time) - continue; + KASSERT(ph->ph_nmissing == 0); + timersub(&curtime, &ph->ph_time, &diff); + if (diff.tv_sec < pool_inactive_time + && !pa_starved_p(pp->pr_alloc)) + continue; - /* - * If freeing this page would put us below - * the low water mark, stop now. - */ - if ((pp->pr_nitems - pp->pr_itemsperpage) < - pp->pr_minitems) - break; + /* + * If freeing this page would put us below + * the low water mark, stop now. + */ + if ((pp->pr_nitems - pp->pr_itemsperpage) < + pp->pr_minitems) + break; - pr_rmpage(pp, ph); - } + pr_rmpage(pp, ph, &pq); } pr_leave(pp); simple_unlock(&pp->pr_slock); -} + if (LIST_EMPTY(&pq) && LIST_EMPTY(&pcgl)) + return 0; + pr_pagelist_free(pp, &pq); + pcg_grouplist_free(&pcgl); + return (1); +} /* * Drain pools, one at a time. @@ -1302,40 +1626,36 @@ _pool_reclaim(pp, file, line) * Note, we must never be called from an interrupt context. */ void -pool_drain(arg) - void *arg; +pool_drain(void *arg) { struct pool *pp; int s; - s = splimp(); + pp = NULL; + s = splvm(); simple_lock(&pool_head_slock); - - if (drainpp == NULL && (drainpp = TAILQ_FIRST(&pool_head)) == NULL) - goto out; - - pp = drainpp; - drainpp = TAILQ_NEXT(pp, pr_poollist); - - pool_reclaim(pp); - - out: + if (drainpp == NULL) { + drainpp = LIST_FIRST(&pool_head); + } + if (drainpp) { + pp = drainpp; + drainpp = LIST_NEXT(pp, pr_poollist); + } simple_unlock(&pool_head_slock); + if (pp) + pool_reclaim(pp); splx(s); } - /* * Diagnostic helpers. */ void -pool_print(pp, modif) - struct pool *pp; - const char *modif; +pool_print(struct pool *pp, const char *modif) { int s; - s = splimp(); + s = splvm(); if (simple_lock_try(&pp->pr_slock) == 0) { printf("pool %s is locked; try again later\n", pp->pr_wchan); @@ -1348,12 +1668,24 @@ pool_print(pp, modif) } void -pool_printit(pp, modif, pr) +pool_printall(const char *modif, void (*pr)(const char *, ...)) +{ struct pool *pp; - const char *modif; - void (*pr) __P((const char *, ...)); + + if (simple_lock_try(&pool_head_slock) == 0) { + (*pr)("WARNING: pool_head_slock is locked\n"); + } else { + simple_unlock(&pool_head_slock); + } + + LIST_FOREACH(pp, &pool_head, pr_poollist) { + pool_printit(pp, modif, pr); + } +} + +void +pool_printit(struct pool *pp, const char *modif, void (*pr)(const char *, ...)) { - int didlock = 0; if (pp == NULL) { (*pr)("Must specify a pool to print.\n"); @@ -1372,25 +1704,45 @@ pool_printit(pp, modif, pr) if (simple_lock_try(&pp->pr_slock) == 0) (*pr)("WARNING: pool %s is locked\n", pp->pr_wchan); else - didlock = 1; + simple_unlock(&pp->pr_slock); pool_print1(pp, modif, pr); - - if (didlock) - simple_unlock(&pp->pr_slock); } static void -pool_print1(pp, modif, pr) - struct pool *pp; - const char *modif; - void (*pr) __P((const char *, ...)); +pool_print_pagelist(struct pool *pp, struct pool_pagelist *pl, + void (*pr)(const char *, ...)) { struct pool_item_header *ph; #ifdef DIAGNOSTIC struct pool_item *pi; #endif - int print_log = 0, print_pagelist = 0; + + LIST_FOREACH(ph, pl, ph_pagelist) { + (*pr)("\t\tpage %p, nmissing %d, time %lu,%lu\n", + ph->ph_page, ph->ph_nmissing, + (u_long)ph->ph_time.tv_sec, + (u_long)ph->ph_time.tv_usec); +#ifdef DIAGNOSTIC + if (!(pp->pr_roflags & PR_NOTOUCH)) { + LIST_FOREACH(pi, &ph->ph_itemlist, pi_list) { + if (pi->pi_magic != PI_MAGIC) { + (*pr)("\t\t\titem %p, magic 0x%x\n", + pi, pi->pi_magic); + } + } + } +#endif + } +} + +static void +pool_print1(struct pool *pp, const char *modif, void (*pr)(const char *, ...)) +{ + struct pool_item_header *ph; + struct pool_cache *pc; + struct pool_cache_group *pcg; + int i, print_log = 0, print_pagelist = 0, print_cache = 0; char c; while ((c = *modif++) != '\0') { @@ -1398,14 +1750,14 @@ pool_print1(pp, modif, pr) print_log = 1; if (c == 'p') print_pagelist = 1; - modif++; + if (c == 'c') + print_cache = 1; } (*pr)("POOL %s: size %u, align %u, ioff %u, roflags 0x%08x\n", pp->pr_wchan, pp->pr_size, pp->pr_align, pp->pr_itemoffset, pp->pr_roflags); - (*pr)("\tpagesz %u, mtype %d\n", pp->pr_pagesz, pp->pr_mtype); - (*pr)("\talloc %p, release %p\n", pp->pr_alloc, pp->pr_free); + (*pr)("\talloc %p\n", pp->pr_alloc); (*pr)("\tminitems %u, minpages %u, maxpages %u, npages %u\n", pp->pr_minitems, pp->pr_minpages, pp->pr_maxpages, pp->pr_npages); (*pr)("\titemsperpage %u, nitems %u, nout %u, hardlimit %u\n", @@ -1419,62 +1771,83 @@ pool_print1(pp, modif, pr) if (print_pagelist == 0) goto skip_pagelist; - if ((ph = TAILQ_FIRST(&pp->pr_pagelist)) != NULL) - (*pr)("\n\tpage list:\n"); - for (; ph != NULL; ph = TAILQ_NEXT(ph, ph_pagelist)) { - (*pr)("\t\tpage %p, nmissing %d, time %lu,%lu\n", - ph->ph_page, ph->ph_nmissing, - (u_long)ph->ph_time.tv_sec, - (u_long)ph->ph_time.tv_usec); -#ifdef DIAGNOSTIC - for (pi = TAILQ_FIRST(&ph->ph_itemlist); pi != NULL; - pi = TAILQ_NEXT(pi, pi_list)) { - if (pi->pi_magic != PI_MAGIC) { - (*pr)("\t\t\titem %p, magic 0x%x\n", - pi, pi->pi_magic); - } - } -#endif - } + if ((ph = LIST_FIRST(&pp->pr_emptypages)) != NULL) + (*pr)("\n\tempty page list:\n"); + pool_print_pagelist(pp, &pp->pr_emptypages, pr); + if ((ph = LIST_FIRST(&pp->pr_fullpages)) != NULL) + (*pr)("\n\tfull page list:\n"); + pool_print_pagelist(pp, &pp->pr_fullpages, pr); + if ((ph = LIST_FIRST(&pp->pr_partpages)) != NULL) + (*pr)("\n\tpartial-page list:\n"); + pool_print_pagelist(pp, &pp->pr_partpages, pr); + if (pp->pr_curpage == NULL) (*pr)("\tno current page\n"); else (*pr)("\tcurpage %p\n", pp->pr_curpage->ph_page); skip_pagelist: - if (print_log == 0) goto skip_log; (*pr)("\n"); if ((pp->pr_roflags & PR_LOGGING) == 0) (*pr)("\tno log\n"); - else + else { pr_printlog(pp, NULL, pr); + } skip_log: + if (print_cache == 0) + goto skip_cache; + +#define PR_GROUPLIST(pcg) \ + (*pr)("\t\tgroup %p: avail %d\n", pcg, pcg->pcg_avail); \ + for (i = 0; i < PCG_NOBJECTS; i++) { \ + if (pcg->pcg_objects[i].pcgo_pa != \ + POOL_PADDR_INVALID) { \ + (*pr)("\t\t\t%p, 0x%llx\n", \ + pcg->pcg_objects[i].pcgo_va, \ + (unsigned long long) \ + pcg->pcg_objects[i].pcgo_pa); \ + } else { \ + (*pr)("\t\t\t%p\n", \ + pcg->pcg_objects[i].pcgo_va); \ + } \ + } + + LIST_FOREACH(pc, &pp->pr_cachelist, pc_poollist) { + (*pr)("\tcache %p\n", pc); + (*pr)("\t hits %lu misses %lu ngroups %lu nitems %lu\n", + pc->pc_hits, pc->pc_misses, pc->pc_ngroups, pc->pc_nitems); + (*pr)("\t full groups:\n"); + LIST_FOREACH(pcg, &pc->pc_fullgroups, pcg_list) { + PR_GROUPLIST(pcg); + } + (*pr)("\t partial groups:\n"); + LIST_FOREACH(pcg, &pc->pc_partgroups, pcg_list) { + PR_GROUPLIST(pcg); + } + (*pr)("\t empty groups:\n"); + LIST_FOREACH(pcg, &pc->pc_emptygroups, pcg_list) { + PR_GROUPLIST(pcg); + } + } +#undef PR_GROUPLIST + skip_cache: pr_enter_check(pp, pr); } -int -pool_chk(pp, label) - struct pool *pp; - char *label; +static int +pool_chk_page(struct pool *pp, const char *label, struct pool_item_header *ph) { - struct pool_item_header *ph; - int r = 0; - - simple_lock(&pp->pr_slock); - - for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; - ph = TAILQ_NEXT(ph, ph_pagelist)) { - - struct pool_item *pi; - int n; - caddr_t page; + struct pool_item *pi; + caddr_t page; + int n; - page = (caddr_t)((u_long)ph & pp->pr_pagemask); + if ((pp->pr_roflags & PR_NOALIGN) == 0) { + page = (caddr_t)((uintptr_t)ph & pp->pr_alloc->pa_pagemask); if (page != ph->ph_page && (pp->pr_roflags & PR_PHINPAGE) != 0) { if (label != NULL) @@ -1483,41 +1856,596 @@ pool_chk(pp, label) " at page head addr %p (p %p)\n", pp, pp->pr_wchan, ph->ph_page, ph, page); - r++; - goto out; + return 1; } + } - for (pi = TAILQ_FIRST(&ph->ph_itemlist), n = 0; - pi != NULL; - pi = TAILQ_NEXT(pi,pi_list), n++) { + if ((pp->pr_roflags & PR_NOTOUCH) != 0) + return 0; -#ifdef DIAGNOSTIC - if (pi->pi_magic != PI_MAGIC) { - if (label != NULL) - printf("%s: ", label); - printf("pool(%s): free list modified: magic=%x;" - " page %p; item ordinal %d;" - " addr %p (p %p)\n", - pp->pr_wchan, pi->pi_magic, ph->ph_page, - n, pi, page); - panic("pool"); - } -#endif - page = (caddr_t)((u_long)pi & pp->pr_pagemask); - if (page == ph->ph_page) - continue; + for (pi = LIST_FIRST(&ph->ph_itemlist), n = 0; + pi != NULL; + pi = LIST_NEXT(pi,pi_list), n++) { +#ifdef DIAGNOSTIC + if (pi->pi_magic != PI_MAGIC) { if (label != NULL) printf("%s: ", label); - printf("pool(%p:%s): page inconsistency: page %p;" - " item ordinal %d; addr %p (p %p)\n", pp, - pp->pr_wchan, ph->ph_page, - n, pi, page); - r++; + printf("pool(%s): free list modified: magic=%x;" + " page %p; item ordinal %d; addr %p\n", + pp->pr_wchan, pi->pi_magic, ph->ph_page, + n, pi); + panic("pool"); + } +#endif + if ((pp->pr_roflags & PR_NOALIGN) != 0) { + continue; + } + page = (caddr_t)((uintptr_t)pi & pp->pr_alloc->pa_pagemask); + if (page == ph->ph_page) + continue; + + if (label != NULL) + printf("%s: ", label); + printf("pool(%p:%s): page inconsistency: page %p;" + " item ordinal %d; addr %p (p %p)\n", pp, + pp->pr_wchan, ph->ph_page, + n, pi, page); + return 1; + } + return 0; +} + + +int +pool_chk(struct pool *pp, const char *label) +{ + struct pool_item_header *ph; + int r = 0; + + simple_lock(&pp->pr_slock); + LIST_FOREACH(ph, &pp->pr_emptypages, ph_pagelist) { + r = pool_chk_page(pp, label, ph); + if (r) { goto out; } } + LIST_FOREACH(ph, &pp->pr_fullpages, ph_pagelist) { + r = pool_chk_page(pp, label, ph); + if (r) { + goto out; + } + } + LIST_FOREACH(ph, &pp->pr_partpages, ph_pagelist) { + r = pool_chk_page(pp, label, ph); + if (r) { + goto out; + } + } + out: simple_unlock(&pp->pr_slock); return (r); } + +/* + * pool_cache_init: + * + * Initialize a pool cache. + * + * NOTE: If the pool must be protected from interrupts, we expect + * to be called at the appropriate interrupt priority level. + */ +void +pool_cache_init(struct pool_cache *pc, struct pool *pp, + int (*ctor)(void *, void *, int), + void (*dtor)(void *, void *), + void *arg) +{ + + LIST_INIT(&pc->pc_emptygroups); + LIST_INIT(&pc->pc_fullgroups); + LIST_INIT(&pc->pc_partgroups); + simple_lock_init(&pc->pc_slock); + + pc->pc_pool = pp; + + pc->pc_ctor = ctor; + pc->pc_dtor = dtor; + pc->pc_arg = arg; + + pc->pc_hits = 0; + pc->pc_misses = 0; + + pc->pc_ngroups = 0; + + pc->pc_nitems = 0; + + simple_lock(&pp->pr_slock); + LIST_INSERT_HEAD(&pp->pr_cachelist, pc, pc_poollist); + simple_unlock(&pp->pr_slock); +} + +/* + * pool_cache_destroy: + * + * Destroy a pool cache. + */ +void +pool_cache_destroy(struct pool_cache *pc) +{ + struct pool *pp = pc->pc_pool; + + /* First, invalidate the entire cache. */ + pool_cache_invalidate(pc); + + /* ...and remove it from the pool's cache list. */ + simple_lock(&pp->pr_slock); + LIST_REMOVE(pc, pc_poollist); + simple_unlock(&pp->pr_slock); +} + +static inline void * +pcg_get(struct pool_cache_group *pcg, paddr_t *pap) +{ + void *object; + u_int idx; + + KASSERT(pcg->pcg_avail <= PCG_NOBJECTS); + KASSERT(pcg->pcg_avail != 0); + idx = --pcg->pcg_avail; + + KASSERT(pcg->pcg_objects[idx].pcgo_va != NULL); + 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); +} + +static inline void +pcg_put(struct pool_cache_group *pcg, void *object, paddr_t pa) +{ + u_int idx; + + KASSERT(pcg->pcg_avail < PCG_NOBJECTS); + idx = pcg->pcg_avail++; + + KASSERT(pcg->pcg_objects[idx].pcgo_va == NULL); + pcg->pcg_objects[idx].pcgo_va = object; + pcg->pcg_objects[idx].pcgo_pa = pa; +} + +static void +pcg_grouplist_free(struct pool_cache_grouplist *pcgl) +{ + struct pool_cache_group *pcg; + int s; + + s = splvm(); + while ((pcg = LIST_FIRST(pcgl)) != NULL) { + LIST_REMOVE(pcg, pcg_list); + pool_put(&pcgpool, pcg); + } + splx(s); +} + +/* + * pool_cache_get{,_paddr}: + * + * Get an object from a pool cache (optionally returning + * the physical address of the object). + */ +void * +pool_cache_get_paddr(struct pool_cache *pc, int flags, paddr_t *pap) +{ + struct pool_cache_group *pcg; + void *object; + +#ifdef LOCKDEBUG + if (flags & PR_WAITOK) + ASSERT_SLEEPABLE(NULL, "pool_cache_get(PR_WAITOK)"); +#endif + + simple_lock(&pc->pc_slock); + + pcg = LIST_FIRST(&pc->pc_partgroups); + if (pcg == NULL) { + pcg = LIST_FIRST(&pc->pc_fullgroups); + if (pcg != NULL) { + LIST_REMOVE(pcg, pcg_list); + LIST_INSERT_HEAD(&pc->pc_partgroups, pcg, pcg_list); + } + } + if (pcg == NULL) { + + /* + * No groups with any available objects. Allocate + * a new object, construct it, and return it to + * the caller. We will allocate a group, if necessary, + * when the object is freed back to the cache. + */ + 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); + } + } + KASSERT((((vaddr_t)object + pc->pc_pool->pr_itemoffset) & + (pc->pc_pool->pr_align - 1)) == 0); + if (object != NULL && pap != NULL) { +#ifdef POOL_VTOPHYS + *pap = POOL_VTOPHYS(object); +#else + *pap = POOL_PADDR_INVALID; +#endif + } + + FREECHECK_OUT(&pc->pc_freecheck, object); + return (object); + } + + pc->pc_hits++; + pc->pc_nitems--; + object = pcg_get(pcg, pap); + + if (pcg->pcg_avail == 0) { + LIST_REMOVE(pcg, pcg_list); + LIST_INSERT_HEAD(&pc->pc_emptygroups, pcg, pcg_list); + } + simple_unlock(&pc->pc_slock); + + KASSERT((((vaddr_t)object + pc->pc_pool->pr_itemoffset) & + (pc->pc_pool->pr_align - 1)) == 0); + FREECHECK_OUT(&pc->pc_freecheck, object); + return (object); +} + +/* + * pool_cache_put{,_paddr}: + * + * Put an object back to the pool cache (optionally caching the + * physical address of the object). + */ +void +pool_cache_put_paddr(struct pool_cache *pc, void *object, paddr_t pa) +{ + struct pool_cache_group *pcg; + int s; + + FREECHECK_IN(&pc->pc_freecheck, object); + + if (__predict_false((pc->pc_pool->pr_flags & PR_WANTED) != 0)) { + goto destruct; + } + + simple_lock(&pc->pc_slock); + + pcg = LIST_FIRST(&pc->pc_partgroups); + if (pcg == NULL) { + pcg = LIST_FIRST(&pc->pc_emptygroups); + if (pcg != NULL) { + LIST_REMOVE(pcg, pcg_list); + LIST_INSERT_HEAD(&pc->pc_partgroups, pcg, pcg_list); + } + } + if (pcg == NULL) { + + /* + * No empty groups to free the object to. Attempt to + * allocate one. + */ + simple_unlock(&pc->pc_slock); + s = splvm(); + pcg = pool_get(&pcgpool, PR_NOWAIT); + splx(s); + if (pcg == NULL) { +destruct: + + /* + * Unable to allocate a cache group; destruct the object + * and free it back to the pool. + */ + pool_cache_destruct_object(pc, object); + return; + } + memset(pcg, 0, sizeof(*pcg)); + simple_lock(&pc->pc_slock); + pc->pc_ngroups++; + LIST_INSERT_HEAD(&pc->pc_partgroups, pcg, pcg_list); + } + + pc->pc_nitems++; + pcg_put(pcg, object, pa); + + if (pcg->pcg_avail == PCG_NOBJECTS) { + LIST_REMOVE(pcg, pcg_list); + LIST_INSERT_HEAD(&pc->pc_fullgroups, pcg, pcg_list); + } + simple_unlock(&pc->pc_slock); +} + +/* + * pool_cache_destruct_object: + * + * 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) + (*pc->pc_dtor)(pc->pc_arg, object); + pool_put(pc->pc_pool, object); +} + +static void +pool_do_cache_invalidate_grouplist(struct pool_cache_grouplist *pcgsl, + struct pool_cache *pc, struct pool_pagelist *pq, + struct pool_cache_grouplist *pcgdl) +{ + struct pool_cache_group *pcg, *npcg; + void *object; + + for (pcg = LIST_FIRST(pcgsl); pcg != NULL; pcg = npcg) { + npcg = LIST_NEXT(pcg, pcg_list); + while (pcg->pcg_avail != 0) { + pc->pc_nitems--; + object = pcg_get(pcg, NULL); + if (pc->pc_dtor != NULL) + (*pc->pc_dtor)(pc->pc_arg, object); + pool_do_put(pc->pc_pool, object, pq); + } + pc->pc_ngroups--; + LIST_REMOVE(pcg, pcg_list); + LIST_INSERT_HEAD(pcgdl, pcg, pcg_list); + } +} + +static void +pool_do_cache_invalidate(struct pool_cache *pc, struct pool_pagelist *pq, + struct pool_cache_grouplist *pcgl) +{ + + LOCK_ASSERT(simple_lock_held(&pc->pc_slock)); + LOCK_ASSERT(simple_lock_held(&pc->pc_pool->pr_slock)); + + pool_do_cache_invalidate_grouplist(&pc->pc_fullgroups, pc, pq, pcgl); + pool_do_cache_invalidate_grouplist(&pc->pc_partgroups, pc, pq, pcgl); + + KASSERT(LIST_EMPTY(&pc->pc_partgroups)); + KASSERT(LIST_EMPTY(&pc->pc_fullgroups)); + KASSERT(pc->pc_nitems == 0); +} + +/* + * pool_cache_invalidate: + * + * Invalidate a pool cache (destruct and release all of the + * cached objects). + */ +void +pool_cache_invalidate(struct pool_cache *pc) +{ + struct pool_pagelist pq; + struct pool_cache_grouplist pcgl; + + LIST_INIT(&pq); + LIST_INIT(&pcgl); + + simple_lock(&pc->pc_slock); + simple_lock(&pc->pc_pool->pr_slock); + + pool_do_cache_invalidate(pc, &pq, &pcgl); + + simple_unlock(&pc->pc_pool->pr_slock); + simple_unlock(&pc->pc_slock); + + pr_pagelist_free(pc->pc_pool, &pq); + pcg_grouplist_free(&pcgl); +} + +/* + * pool_cache_reclaim: + * + * Reclaim a pool cache for pool_reclaim(). + */ +static void +pool_cache_reclaim(struct pool_cache *pc, struct pool_pagelist *pq, + struct pool_cache_grouplist *pcgl) +{ + + /* + * We're locking in the wrong order (normally pool_cache -> pool, + * but the pool is already locked when we get here), so we have + * to use trylock. If we can't lock the pool_cache, it's not really + * a big deal here. + */ + if (simple_lock_try(&pc->pc_slock) == 0) + return; + + pool_do_cache_invalidate(pc, pq, pcgl); + + simple_unlock(&pc->pc_slock); +} + +/* + * Pool backend allocators. + * + * Each pool has a backend allocator that handles allocation, deallocation, + * and any additional draining that might be needed. + * + * We provide two standard allocators: + * + * pool_allocator_kmem - the default when no allocator is specified + * + * pool_allocator_nointr - used for pools that will not be accessed + * in interrupt context. + */ +void *pool_page_alloc(struct pool *, int); +void pool_page_free(struct pool *, void *); + +#ifdef POOL_SUBPAGE +struct pool_allocator pool_allocator_kmem_fullpage = { + pool_page_alloc, pool_page_free, 0, + .pa_backingmapptr = &kmem_map, +}; +#else +struct pool_allocator pool_allocator_kmem = { + pool_page_alloc, pool_page_free, 0, + .pa_backingmapptr = &kmem_map, +}; +#endif + +void *pool_page_alloc_nointr(struct pool *, int); +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 = { + pool_page_alloc_nointr, pool_page_free_nointr, 0, + .pa_backingmapptr = &kernel_map, +}; +#endif + +#ifdef POOL_SUBPAGE +void *pool_subpage_alloc(struct pool *, int); +void pool_subpage_free(struct pool *, void *); + +struct pool_allocator pool_allocator_kmem = { + 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 */ + +static void * +pool_allocator_alloc(struct pool *pp, int flags) +{ + struct pool_allocator *pa = pp->pr_alloc; + void *res; + + LOCK_ASSERT(!simple_lock_held(&pp->pr_slock)); + + res = (*pa->pa_alloc)(pp, flags); + if (res == NULL && (flags & PR_WAITOK) == 0) { + /* + * We only run the drain hook here if PR_NOWAIT. + * In other cases, the hook will be run in + * pool_reclaim(). + */ + if (pp->pr_drain_hook != NULL) { + (*pp->pr_drain_hook)(pp->pr_drain_hook_arg, flags); + res = (*pa->pa_alloc)(pp, flags); + } + } + return res; +} + +static void +pool_allocator_free(struct pool *pp, void *v) +{ + struct pool_allocator *pa = pp->pr_alloc; + + LOCK_ASSERT(!simple_lock_held(&pp->pr_slock)); + + (*pa->pa_free)(pp, v); +} + +void * +pool_page_alloc(struct pool *pp, int flags) +{ + boolean_t waitok = (flags & PR_WAITOK) ? TRUE : FALSE; + + return ((void *) uvm_km_alloc_poolpage_cache(kmem_map, waitok)); +} + +void +pool_page_free(struct pool *pp, void *v) +{ + + uvm_km_free_poolpage_cache(kmem_map, (vaddr_t) v); +} + +static void * +pool_page_alloc_meta(struct pool *pp, int flags) +{ + boolean_t waitok = (flags & PR_WAITOK) ? TRUE : FALSE; + + return ((void *) uvm_km_alloc_poolpage(kmem_map, waitok)); +} + +static void +pool_page_free_meta(struct pool *pp, void *v) +{ + + uvm_km_free_poolpage(kmem_map, (vaddr_t) v); +} + +#ifdef POOL_SUBPAGE +/* Sub-page allocator, for machines with large hardware pages. */ +void * +pool_subpage_alloc(struct pool *pp, int flags) +{ + void *v; + int s; + s = splvm(); + v = pool_get(&psppool, flags); + splx(s); + return v; +} + +void +pool_subpage_free(struct pool *pp, void *v) +{ + int s; + s = splvm(); + pool_put(&psppool, v); + splx(s); +} + +/* We don't provide a real nointr allocator. Maybe later. */ +void * +pool_subpage_alloc_nointr(struct pool *pp, int flags) +{ + + return (pool_subpage_alloc(pp, flags)); +} + +void +pool_subpage_free_nointr(struct pool *pp, void *v) +{ + + pool_subpage_free(pp, v); +} +#endif /* POOL_SUBPAGE */ +void * +pool_page_alloc_nointr(struct pool *pp, int flags) +{ + boolean_t waitok = (flags & PR_WAITOK) ? TRUE : FALSE; + + return ((void *) uvm_km_alloc_poolpage_cache(kernel_map, waitok)); +} + +void +pool_page_free_nointr(struct pool *pp, void *v) +{ + + uvm_km_free_poolpage_cache(kernel_map, (vaddr_t) v); +}