| version 1.112, 2006/02/24 11:46:20 |
version 1.112.2.6, 2006/09/03 15:25:22 |
| Line 82 static struct pool phpool[PHPOOL_MAX]; |
|
| Line 82 static struct pool phpool[PHPOOL_MAX]; |
|
| static struct pool psppool; |
static struct pool psppool; |
| #endif |
#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_alloc_meta(struct pool *, int); |
| static void pool_page_free_meta(struct pool *, void *); |
static void pool_page_free_meta(struct pool *, void *); |
| |
|
| /* allocator for pool metadata */ |
/* allocator for pool metadata */ |
| static struct pool_allocator pool_allocator_meta = { |
static struct pool_allocator pool_allocator_meta = { |
| pool_page_alloc_meta, pool_page_free_meta |
pool_page_alloc_meta, pool_page_free_meta, |
| |
.pa_backingmapptr = &kmem_map, |
| }; |
}; |
| |
|
| /* # of seconds to retain page after last use */ |
/* # of seconds to retain page after last use */ |
| Line 183 static void pool_prime_page(struct pool |
|
| Line 187 static void pool_prime_page(struct pool |
|
| struct pool_item_header *); |
struct pool_item_header *); |
| static void pool_update_curpage(struct pool *); |
static void pool_update_curpage(struct pool *); |
| |
|
| 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); |
| |
static void pool_allocator_free(struct pool *, void *); |
| |
|
| 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 359 pr_item_notouch_get(const struct pool *p |
|
| Line 364 pr_item_notouch_get(const struct pool *p |
|
| 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) |
| { |
{ |
| |
|
| |
/* |
| |
* 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) |
if (a->ph_page < b->ph_page) |
| return (-1); |
|
| else if (a->ph_page > b->ph_page) |
|
| return (1); |
return (1); |
| |
else if (a->ph_page > b->ph_page) |
| |
return (-1); |
| else |
else |
| return (0); |
return (0); |
| } |
} |
| Line 371 SPLAY_PROTOTYPE(phtree, pool_item_header |
|
| Line 382 SPLAY_PROTOTYPE(phtree, pool_item_header |
|
| SPLAY_GENERATE(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 * |
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; |
| |
|
| if ((pp->pr_roflags & PR_PHINPAGE) != 0) |
if ((pp->pr_roflags & PR_NOALIGN) != 0) { |
| return ((struct pool_item_header *)(page + pp->pr_phoffset)); |
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); |
| |
} |
| |
} |
| |
|
| tmp.ph_page = page; |
KASSERT(ph == NULL || ((pp->pr_roflags & PR_PHINPAGE) != 0) || |
| ph = SPLAY_FIND(phtree, &pp->pr_phtree, &tmp); |
(ph->ph_page <= (char *)v && |
| |
(char *)v < ph->ph_page + pp->pr_alloc->pa_pagesz)); |
| return ph; |
return ph; |
| } |
} |
| |
|
| Line 442 pr_rmpage(struct pool *pp, struct pool_i |
|
| Line 473 pr_rmpage(struct pool *pp, struct pool_i |
|
| pool_update_curpage(pp); |
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; |
| |
} |
| |
|
| |
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; |
| |
|
| Line 455 link_pool_init(void) |
|
| Line 560 link_pool_init(void) |
|
| 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); |
| |
|
| |
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(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 off, slack; |
#ifdef DEBUG |
| |
struct pool *pp1; |
| |
#endif |
| size_t trysize, phsize; |
size_t trysize, phsize; |
| int s; |
int off, slack, s; |
| |
|
| KASSERT((1UL << (CHAR_BIT * sizeof(pool_item_freelist_t))) - 2 >= |
KASSERT((1UL << (CHAR_BIT * sizeof(pool_item_freelist_t))) - 2 >= |
| PHPOOL_FREELIST_NELEM(PHPOOL_MAX - 1)); |
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 |
#ifdef POOL_DIAGNOSTIC |
| /* |
/* |
| * Always log if POOL_DIAGNOSTIC is defined. |
* Always log if POOL_DIAGNOSTIC is defined. |
| Line 501 pool_init(struct pool *pp, size_t size, |
|
| Line 627 pool_init(struct pool *pp, size_t size, |
|
| simple_lock_init(&palloc->pa_slock); |
simple_lock_init(&palloc->pa_slock); |
| 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 563 pool_init(struct pool *pp, size_t size, |
|
| Line 692 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 682 pool_init(struct pool *pp, size_t size, |
|
| Line 811 pool_init(struct pool *pp, size_t size, |
|
| 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); |
simple_unlock(&palloc->pa_slock); |
| splx(s); |
splx(s); |
| |
pool_reclaim_register(pp); |
| } |
} |
| |
|
| /* |
/* |
| Line 702 pool_destroy(struct pool *pp) |
|
| Line 832 pool_destroy(struct pool *pp) |
|
| simple_unlock(&pool_head_slock); |
simple_unlock(&pool_head_slock); |
| |
|
| /* Remove this pool from its allocator's list of pools. */ |
/* Remove this pool from its allocator's list of pools. */ |
| |
pool_reclaim_unregister(pp); |
| s = splvm(); |
s = splvm(); |
| simple_lock(&pp->pr_alloc->pa_slock); |
simple_lock(&pp->pr_alloc->pa_slock); |
| TAILQ_REMOVE(&pp->pr_alloc->pa_list, pp, pr_alloc_list); |
TAILQ_REMOVE(&pp->pr_alloc->pa_list, pp, pr_alloc_list); |
| Line 797 pool_get(struct pool *pp, int flags) |
|
| Line 928 pool_get(struct pool *pp, int flags) |
|
| #endif /* DIAGNOSTIC */ |
#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(NULL, "pool_get(PR_WAITOK)"); |
| SCHED_ASSERT_UNLOCKED(); |
SCHED_ASSERT_UNLOCKED(); |
| #endif |
#endif |
| |
|
| Line 867 pool_get(struct pool *pp, int flags) |
|
| Line 998 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); |
simple_unlock(&pp->pr_slock); |
| Line 882 pool_get(struct pool *pp, int flags) |
|
| Line 1015 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 903 pool_get(struct pool *pp, int flags) |
|
| Line 1027 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. |
|
| * |
|
| * wake up once a second and try again, |
|
| * as the check in pool_cache_put_paddr() is racy. |
|
| */ |
|
| 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, hz, &pp->pr_slock); |
simple_unlock(&pp->pr_slock); |
| 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 1043 pool_do_put(struct pool *pp, void *v, st |
|
| Line 1146 pool_do_put(struct pool *pp, void *v, st |
|
| { |
{ |
| 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)); |
LOCK_ASSERT(simple_lock_held(&pp->pr_slock)); |
| SCHED_ASSERT_UNLOCKED(); |
SCHED_ASSERT_UNLOCKED(); |
| |
|
| page = (caddr_t)((u_long)v & pp->pr_alloc->pa_pagemask); |
|
| |
|
| #ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
| if (__predict_false(pp->pr_nout == 0)) { |
if (__predict_false(pp->pr_nout == 0)) { |
| printf("pool %s: putting with none out\n", |
printf("pool %s: putting with none out\n", |
| Line 1059 pool_do_put(struct pool *pp, void *v, st |
|
| Line 1158 pool_do_put(struct pool *pp, void *v, st |
|
| } |
} |
| #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); |
| } |
} |
| Line 1127 pool_do_put(struct pool *pp, void *v, st |
|
| Line 1226 pool_do_put(struct pool *pp, void *v, st |
|
| 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)) { |
pa_starved_p(pp->pr_alloc))) { |
| pr_rmpage(pp, ph, pq); |
pr_rmpage(pp, ph, pq); |
| } else { |
} else { |
| LIST_REMOVE(ph, ph_pagelist); |
LIST_REMOVE(ph, ph_pagelist); |
| Line 1139 pool_do_put(struct pool *pp, void *v, st |
|
| Line 1238 pool_do_put(struct pool *pp, void *v, st |
|
| * be reclaimed by the pagedaemon. This minimizes |
* be reclaimed by the pagedaemon. This minimizes |
| * ping-pong'ing for memory. |
* ping-pong'ing for memory. |
| */ |
*/ |
| s = splclock(); |
getmicrotime(&ph->ph_time); |
| ph->ph_time = mono_time; |
|
| splx(s); |
|
| } |
} |
| pool_update_curpage(pp); |
pool_update_curpage(pp); |
| } |
} |
| Line 1204 pool_put(struct pool *pp, void *v) |
|
| Line 1301 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; |
| |
|
| |
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. |
* 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); |
simple_lock(&pp->pr_slock); |
| |
|
| 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++; |
| } |
} |
| |
|
| Line 1240 pool_prime(struct pool *pp, int n) |
|
| Line 1358 pool_prime(struct pool *pp, int n) |
|
| pp->pr_maxpages = pp->pr_minpages + 1; /* XXX */ |
pp->pr_maxpages = pp->pr_minpages + 1; /* XXX */ |
| |
|
| simple_unlock(&pp->pr_slock); |
simple_unlock(&pp->pr_slock); |
| return (0); |
return error; |
| } |
} |
| |
|
| /* |
/* |
| Line 1256 pool_prime_page(struct pool *pp, caddr_t |
|
| Line 1374 pool_prime_page(struct pool *pp, caddr_t |
|
| unsigned int align = pp->pr_align; |
unsigned int align = pp->pr_align; |
| unsigned int ioff = pp->pr_itemoffset; |
unsigned int ioff = pp->pr_itemoffset; |
| int n; |
int n; |
| int s; |
|
| |
|
| LOCK_ASSERT(simple_lock_held(&pp->pr_slock)); |
LOCK_ASSERT(simple_lock_held(&pp->pr_slock)); |
| |
|
| #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 1272 pool_prime_page(struct pool *pp, caddr_t |
|
| Line 1390 pool_prime_page(struct pool *pp, caddr_t |
|
| LIST_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(); |
getmicrotime(&ph->ph_time); |
| 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 1345 pool_prime_page(struct pool *pp, caddr_t |
|
| Line 1461 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 |
| Line 1459 pool_reclaim(struct pool *pp) |
|
| Line 1556 pool_reclaim(struct pool *pp) |
|
| struct pool_pagelist pq; |
struct pool_pagelist pq; |
| struct pool_cache_grouplist pcgl; |
struct pool_cache_grouplist pcgl; |
| struct timeval curtime, diff; |
struct timeval curtime, diff; |
| int s; |
|
| |
|
| if (pp->pr_drain_hook != NULL) { |
if (pp->pr_drain_hook != NULL) { |
| /* |
/* |
| Line 1481 pool_reclaim(struct pool *pp) |
|
| Line 1577 pool_reclaim(struct pool *pp) |
|
| LIST_FOREACH(pc, &pp->pr_cachelist, pc_poollist) |
LIST_FOREACH(pc, &pp->pr_cachelist, pc_poollist) |
| pool_cache_reclaim(pc, &pq, &pcgl); |
pool_cache_reclaim(pc, &pq, &pcgl); |
| |
|
| s = splclock(); |
getmicrotime(&curtime); |
| 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 1494 pool_reclaim(struct pool *pp) |
|
| Line 1588 pool_reclaim(struct pool *pp) |
|
| |
|
| KASSERT(ph->ph_nmissing == 0); |
KASSERT(ph->ph_nmissing == 0); |
| timersub(&curtime, &ph->ph_time, &diff); |
timersub(&curtime, &ph->ph_time, &diff); |
| if (diff.tv_sec < pool_inactive_time) |
if (diff.tv_sec < pool_inactive_time |
| |
&& !pa_starved_p(pp->pr_alloc)) |
| continue; |
continue; |
| |
|
| /* |
/* |
| Line 1540 pool_drain(void *arg) |
|
| Line 1635 pool_drain(void *arg) |
|
| drainpp = LIST_NEXT(pp, pr_poollist); |
drainpp = LIST_NEXT(pp, pr_poollist); |
| } |
} |
| simple_unlock(&pool_head_slock); |
simple_unlock(&pool_head_slock); |
| pool_reclaim(pp); |
if (pp) |
| |
pool_reclaim(pp); |
| splx(s); |
splx(s); |
| } |
} |
| |
|
| Line 1690 pool_print1(struct pool *pp, const char |
|
| Line 1786 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) |
if (print_cache == 0) |
| Line 1742 pool_chk_page(struct pool *pp, const cha |
|
| Line 1839 pool_chk_page(struct pool *pp, const cha |
|
| caddr_t page; |
caddr_t 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 = (caddr_t)((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) |
| Line 1766 pool_chk_page(struct pool *pp, const cha |
|
| Line 1865 pool_chk_page(struct pool *pp, const cha |
|
| 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 = (caddr_t)((uintptr_t)pi & pp->pr_alloc->pa_pagemask); |
| if (page == ph->ph_page) |
if (page == ph->ph_page) |
| continue; |
continue; |
| |
|
| Line 1938 pool_cache_get_paddr(struct pool_cache * |
|
| Line 2038 pool_cache_get_paddr(struct pool_cache * |
|
| |
|
| #ifdef LOCKDEBUG |
#ifdef LOCKDEBUG |
| if (flags & PR_WAITOK) |
if (flags & PR_WAITOK) |
| simple_lock_only_held(NULL, "pool_cache_get(PR_WAITOK)"); |
ASSERT_SLEEPABLE(NULL, "pool_cache_get(PR_WAITOK)"); |
| #endif |
#endif |
| |
|
| simple_lock(&pc->pc_slock); |
simple_lock(&pc->pc_slock); |
| Line 2177 void pool_page_free(struct pool *, void |
|
| Line 2277 void pool_page_free(struct pool *, void |
|
| #ifdef POOL_SUBPAGE |
#ifdef POOL_SUBPAGE |
| struct pool_allocator pool_allocator_kmem_fullpage = { |
struct pool_allocator pool_allocator_kmem_fullpage = { |
| pool_page_alloc, pool_page_free, 0, |
pool_page_alloc, pool_page_free, 0, |
| |
.pa_backingmapptr = &kmem_map, |
| }; |
}; |
| #else |
#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 |
#endif |
| |
|
| Line 2190 void pool_page_free_nointr(struct pool * |
|
| Line 2292 void pool_page_free_nointr(struct pool * |
|
| #ifdef POOL_SUBPAGE |
#ifdef POOL_SUBPAGE |
| struct pool_allocator pool_allocator_nointr_fullpage = { |
struct pool_allocator pool_allocator_nointr_fullpage = { |
| pool_page_alloc_nointr, pool_page_free_nointr, 0, |
pool_page_alloc_nointr, pool_page_free_nointr, 0, |
| |
.pa_backingmapptr = &kernel_map, |
| }; |
}; |
| #else |
#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 |
#endif |
| |
|
| Line 2203 void pool_subpage_free(struct pool *, vo |
|
| Line 2307 void pool_subpage_free(struct pool *, vo |
|
| |
|
| struct pool_allocator pool_allocator_kmem = { |
struct pool_allocator pool_allocator_kmem = { |
| pool_subpage_alloc, pool_subpage_free, POOL_SUBPAGE, |
pool_subpage_alloc, pool_subpage_free, POOL_SUBPAGE, |
| |
.pa_backingmapptr = &kmem_map, |
| }; |
}; |
| |
|
| void *pool_subpage_alloc_nointr(struct pool *, int); |
void *pool_subpage_alloc_nointr(struct pool *, int); |
| Line 2210 void pool_subpage_free_nointr(struct poo |
|
| Line 2315 void pool_subpage_free_nointr(struct poo |
|
| |
|
| struct pool_allocator pool_allocator_nointr = { |
struct pool_allocator pool_allocator_nointr = { |
| pool_subpage_alloc, pool_subpage_free, POOL_SUBPAGE, |
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)); |
LOCK_ASSERT(!simple_lock_held(&pp->pr_slock)); |
| |
|
| 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; |
|
| } |
|
| |
|
| |
res = (*pa->pa_alloc)(pp, flags); |
| |
if (res == NULL && (flags & PR_WAITOK) == 0) { |
| /* |
/* |
| * Drain all pools, that use this allocator. |
* We only run the drain hook here if PR_NOWAIT. |
| * 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); |
|
| 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)); |
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 * |