version 1.30.2.4, 2000/12/13 15:50:21 |
version 1.56, 2001/05/13 17:06:59 |
Line 103 struct pool_item { |
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Line 103 struct pool_item { |
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#define PR_HASH_INDEX(pp,addr) \ |
#define PR_HASH_INDEX(pp,addr) \ |
(((u_long)(addr) >> (pp)->pr_pageshift) & (PR_HASHTABSIZE - 1)) |
(((u_long)(addr) >> (pp)->pr_pageshift) & (PR_HASHTABSIZE - 1)) |
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|
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#define POOL_NEEDS_CATCHUP(pp) \ |
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((pp)->pr_nitems < (pp)->pr_minitems) |
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/* |
/* |
* Pool cache management. |
* Pool cache management. |
* |
* |
Line 145 struct pool_cache_group { |
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Line 148 struct pool_cache_group { |
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static void pool_cache_reclaim(struct pool_cache *); |
static void pool_cache_reclaim(struct pool_cache *); |
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static int pool_catchup(struct pool *); |
static int pool_catchup(struct pool *); |
static void pool_prime_page(struct pool *, caddr_t); |
static void pool_prime_page(struct pool *, caddr_t, |
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struct pool_item_header *); |
static void *pool_page_alloc(unsigned long, int, int); |
static void *pool_page_alloc(unsigned long, int, int); |
static void pool_page_free(void *, unsigned long, int); |
static void pool_page_free(void *, unsigned long, int); |
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Line 153 static void pool_print1(struct pool *, c |
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Line 157 static void pool_print1(struct pool *, c |
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void (*)(const char *, ...)); |
void (*)(const char *, ...)); |
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/* |
/* |
* 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 { |
struct pool_log { |
const char *pl_file; |
const char *pl_file; |
Line 344 pr_rmpage(struct pool *pp, struct pool_i |
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Line 348 pr_rmpage(struct pool *pp, struct pool_i |
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} |
} |
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/* |
/* |
* Allocate and initialize a pool. |
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*/ |
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struct pool * |
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pool_create(size_t size, u_int align, u_int ioff, int nitems, |
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const char *wchan, size_t pagesz, |
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void *(*alloc)(unsigned long, int, int), |
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void (*release)(void *, unsigned long, int), |
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int mtype) |
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{ |
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struct pool *pp; |
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int flags; |
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pp = (struct pool *)malloc(sizeof(*pp), M_POOL, M_NOWAIT); |
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if (pp == NULL) |
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return (NULL); |
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flags = PR_FREEHEADER; |
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pool_init(pp, size, align, ioff, flags, wchan, pagesz, |
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alloc, release, mtype); |
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|
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if (nitems != 0) { |
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if (pool_prime(pp, nitems, NULL) != 0) { |
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pool_destroy(pp); |
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return (NULL); |
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} |
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} |
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|
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return (pp); |
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} |
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|
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/* |
|
* Initialize the given pool resource structure. |
* Initialize the given pool resource structure. |
* |
* |
* We export this routine to allow other kernel parts to declare |
* We export this routine to allow other kernel parts to declare |
Line 576 pool_destroy(struct pool *pp) |
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Line 549 pool_destroy(struct pool *pp) |
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free(pp, M_POOL); |
free(pp, M_POOL); |
} |
} |
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|
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static __inline struct pool_item_header * |
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pool_alloc_item_header(struct pool *pp, caddr_t storage, int flags) |
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{ |
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struct pool_item_header *ph; |
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int s; |
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LOCK_ASSERT(simple_lock_held(&pp->pr_slock) == 0); |
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|
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if ((pp->pr_roflags & PR_PHINPAGE) != 0) |
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ph = (struct pool_item_header *) (storage + pp->pr_phoffset); |
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else { |
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s = splhigh(); |
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ph = pool_get(&phpool, flags); |
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splx(s); |
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} |
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|
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return (ph); |
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} |
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/* |
/* |
* Grab an item from the pool; must be called at appropriate spl level |
* Grab an item from the pool; must be called at appropriate spl level |
*/ |
*/ |
void * |
void * |
|
#ifdef DIAGNOSTIC |
_pool_get(struct pool *pp, int flags, const char *file, long line) |
_pool_get(struct pool *pp, int flags, const char *file, long line) |
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#else |
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pool_get(struct pool *pp, int flags) |
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#endif |
{ |
{ |
void *v; |
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struct pool_item *pi; |
struct pool_item *pi; |
struct pool_item_header *ph; |
struct pool_item_header *ph; |
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void *v; |
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#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (__predict_false((pp->pr_roflags & PR_STATIC) && |
if (__predict_false((pp->pr_roflags & PR_STATIC) && |
Line 593 _pool_get(struct pool *pp, int flags, co |
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Line 588 _pool_get(struct pool *pp, int flags, co |
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pr_printlog(pp, NULL, printf); |
pr_printlog(pp, NULL, printf); |
panic("pool_get: static"); |
panic("pool_get: static"); |
} |
} |
#endif |
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|
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if (__predict_false(curproc == NULL && doing_shutdown == 0 && |
if (__predict_false(curproc == NULL && doing_shutdown == 0 && |
(flags & PR_WAITOK) != 0)) |
(flags & PR_WAITOK) != 0)) |
panic("pool_get: must have NOWAIT"); |
panic("pool_get: must have NOWAIT"); |
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#endif |
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simple_lock(&pp->pr_slock); |
simple_lock(&pp->pr_slock); |
pr_enter(pp, file, line); |
pr_enter(pp, file, line); |
Line 653 _pool_get(struct pool *pp, int flags, co |
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Line 648 _pool_get(struct pool *pp, int flags, co |
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* has no items in its bucket. |
* has no items in its bucket. |
*/ |
*/ |
if ((ph = pp->pr_curpage) == NULL) { |
if ((ph = pp->pr_curpage) == NULL) { |
void *v; |
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#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 672 _pool_get(struct pool *pp, int flags, co |
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Line 665 _pool_get(struct pool *pp, int flags, co |
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pr_leave(pp); |
pr_leave(pp); |
simple_unlock(&pp->pr_slock); |
simple_unlock(&pp->pr_slock); |
v = (*pp->pr_alloc)(pp->pr_pagesz, flags, pp->pr_mtype); |
v = (*pp->pr_alloc)(pp->pr_pagesz, flags, pp->pr_mtype); |
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if (__predict_true(v != NULL)) |
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ph = pool_alloc_item_header(pp, v, flags); |
simple_lock(&pp->pr_slock); |
simple_lock(&pp->pr_slock); |
pr_enter(pp, file, line); |
pr_enter(pp, file, line); |
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if (v == NULL) { |
if (__predict_false(v == NULL || ph == NULL)) { |
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if (v != NULL) |
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(*pp->pr_free)(v, pp->pr_pagesz, pp->pr_mtype); |
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/* |
/* |
* We were unable to allocate a page, but |
* We were unable to allocate a page or item |
* we released the lock during allocation, |
* header, but we released the lock during |
* so perhaps items were freed back to the |
* allocation, so perhaps items were freed |
* pool. Check for this case. |
* back to the pool. Check for this case. |
*/ |
*/ |
if (pp->pr_curpage != NULL) |
if (pp->pr_curpage != NULL) |
goto startover; |
goto startover; |
Line 714 _pool_get(struct pool *pp, int flags, co |
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Line 712 _pool_get(struct pool *pp, int flags, co |
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} |
} |
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/* We have more memory; add it to the pool */ |
/* We have more memory; add it to the pool */ |
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pool_prime_page(pp, v, ph); |
pp->pr_npagealloc++; |
pp->pr_npagealloc++; |
pool_prime_page(pp, v); |
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/* Start the allocation process over. */ |
/* Start the allocation process over. */ |
goto startover; |
goto startover; |
Line 734 _pool_get(struct pool *pp, int flags, co |
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Line 732 _pool_get(struct pool *pp, int flags, co |
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pp->pr_wchan, pp->pr_nitems); |
pp->pr_wchan, pp->pr_nitems); |
panic("pool_get: nitems inconsistent\n"); |
panic("pool_get: nitems inconsistent\n"); |
} |
} |
#endif |
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pr_log(pp, v, PRLOG_GET, file, line); |
pr_log(pp, v, PRLOG_GET, file, line); |
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#ifdef DIAGNOSTIC |
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if (__predict_false(pi->pi_magic != PI_MAGIC)) { |
if (__predict_false(pi->pi_magic != PI_MAGIC)) { |
pr_printlog(pp, pi, printf); |
pr_printlog(pp, pi, printf); |
panic("pool_get(%s): free list modified: magic=%x; page %p;" |
panic("pool_get(%s): free list modified: magic=%x; page %p;" |
Line 796 _pool_get(struct pool *pp, int flags, co |
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Line 793 _pool_get(struct pool *pp, int flags, co |
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* If we have a low water mark and we are now below that low |
* If we have a low water mark and we are now below that low |
* water mark, add more items to the pool. |
* 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 |
* XXX: Should we log a warning? Should we set up a timeout |
* to try again in a second or so? The latter could break |
* to try again in a second or so? The latter could break |
Line 813 _pool_get(struct pool *pp, int flags, co |
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Line 810 _pool_get(struct pool *pp, int flags, co |
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* Internal version of pool_put(). Pool is already locked/entered. |
* Internal version of pool_put(). Pool is already locked/entered. |
*/ |
*/ |
static void |
static void |
pool_do_put(struct pool *pp, void *v, const char *file, long line) |
pool_do_put(struct pool *pp, void *v) |
{ |
{ |
struct pool_item *pi = v; |
struct pool_item *pi = v; |
struct pool_item_header *ph; |
struct pool_item_header *ph; |
Line 830 pool_do_put(struct pool *pp, void *v, co |
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Line 827 pool_do_put(struct pool *pp, void *v, co |
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} |
} |
#endif |
#endif |
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pr_log(pp, v, PRLOG_PUT, file, line); |
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if (__predict_false((ph = pr_find_pagehead(pp, page)) == NULL)) { |
if (__predict_false((ph = pr_find_pagehead(pp, page)) == 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 942 pool_do_put(struct pool *pp, void *v, co |
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Line 937 pool_do_put(struct pool *pp, void *v, co |
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/* |
/* |
* Return resource to the pool; must be called at appropriate spl level |
* Return resource to the pool; must be called at appropriate spl level |
*/ |
*/ |
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#ifdef DIAGNOSTIC |
void |
void |
_pool_put(struct pool *pp, void *v, const char *file, long line) |
_pool_put(struct pool *pp, void *v, const char *file, long line) |
{ |
{ |
Line 949 _pool_put(struct pool *pp, void *v, cons |
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Line 945 _pool_put(struct pool *pp, void *v, cons |
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simple_lock(&pp->pr_slock); |
simple_lock(&pp->pr_slock); |
pr_enter(pp, file, line); |
pr_enter(pp, file, line); |
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pool_do_put(pp, v, file, line); |
pr_log(pp, v, PRLOG_PUT, file, line); |
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pool_do_put(pp, v); |
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pr_leave(pp); |
pr_leave(pp); |
simple_unlock(&pp->pr_slock); |
simple_unlock(&pp->pr_slock); |
} |
} |
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#else |
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void |
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pool_put(struct pool *pp, void *v) |
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{ |
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simple_lock(&pp->pr_slock); |
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pool_do_put(pp, v); |
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simple_unlock(&pp->pr_slock); |
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} |
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#endif |
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/* |
/* |
* Add N items to the pool. |
* Add N items to the pool. |
*/ |
*/ |
int |
int |
pool_prime(struct pool *pp, int n, caddr_t storage) |
pool_prime(struct pool *pp, int n) |
{ |
{ |
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struct pool_item_header *ph; |
caddr_t cp; |
caddr_t cp; |
int newnitems, newpages; |
int newpages, error = 0; |
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#ifdef DIAGNOSTIC |
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if (__predict_false(storage && !(pp->pr_roflags & PR_STATIC))) |
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panic("pool_prime: static"); |
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/* !storage && static caught below */ |
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#endif |
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simple_lock(&pp->pr_slock); |
simple_lock(&pp->pr_slock); |
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newnitems = pp->pr_minitems + n; |
newpages = roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
newpages = |
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roundup(newnitems, pp->pr_itemsperpage) / pp->pr_itemsperpage |
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- pp->pr_minpages; |
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while (newpages-- > 0) { |
while (newpages-- > 0) { |
if (pp->pr_roflags & PR_STATIC) { |
simple_unlock(&pp->pr_slock); |
cp = storage; |
cp = (*pp->pr_alloc)(pp->pr_pagesz, PR_NOWAIT, pp->pr_mtype); |
storage += pp->pr_pagesz; |
if (__predict_true(cp != NULL)) |
} else { |
ph = pool_alloc_item_header(pp, cp, PR_NOWAIT); |
simple_unlock(&pp->pr_slock); |
simple_lock(&pp->pr_slock); |
cp = (*pp->pr_alloc)(pp->pr_pagesz, 0, pp->pr_mtype); |
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simple_lock(&pp->pr_slock); |
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} |
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if (cp == NULL) { |
if (__predict_false(cp == NULL || ph == NULL)) { |
simple_unlock(&pp->pr_slock); |
error = ENOMEM; |
return (ENOMEM); |
if (cp != NULL) |
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(*pp->pr_free)(cp, pp->pr_pagesz, pp->pr_mtype); |
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break; |
} |
} |
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pool_prime_page(pp, cp, ph); |
pp->pr_npagealloc++; |
pp->pr_npagealloc++; |
pool_prime_page(pp, cp); |
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pp->pr_minpages++; |
pp->pr_minpages++; |
} |
} |
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pp->pr_minitems = newnitems; |
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if (pp->pr_minpages >= pp->pr_maxpages) |
if (pp->pr_minpages >= pp->pr_maxpages) |
pp->pr_maxpages = pp->pr_minpages + 1; /* XXX */ |
pp->pr_maxpages = pp->pr_minpages + 1; /* XXX */ |
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Line 1012 pool_prime(struct pool *pp, int n, caddr |
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Line 1012 pool_prime(struct pool *pp, int n, caddr |
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* Note, we must be called with the pool descriptor LOCKED. |
* Note, we must be called with the pool descriptor LOCKED. |
*/ |
*/ |
static void |
static void |
pool_prime_page(struct pool *pp, caddr_t storage) |
pool_prime_page(struct pool *pp, caddr_t storage, struct pool_item_header *ph) |
{ |
{ |
struct pool_item *pi; |
struct pool_item *pi; |
struct pool_item_header *ph; |
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caddr_t cp = storage; |
caddr_t cp = storage; |
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 s, n; |
int n; |
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if (((u_long)cp & (pp->pr_pagesz - 1)) != 0) |
if (((u_long)cp & (pp->pr_pagesz - 1)) != 0) |
panic("pool_prime_page: %s: unaligned page", pp->pr_wchan); |
panic("pool_prime_page: %s: unaligned page", pp->pr_wchan); |
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if ((pp->pr_roflags & PR_PHINPAGE) != 0) { |
if ((pp->pr_roflags & PR_PHINPAGE) == 0) |
ph = (struct pool_item_header *)(cp + pp->pr_phoffset); |
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} else { |
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s = splhigh(); |
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ph = pool_get(&phpool, PR_URGENT); |
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splx(s); |
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LIST_INSERT_HEAD(&pp->pr_hashtab[PR_HASH_INDEX(pp, cp)], |
LIST_INSERT_HEAD(&pp->pr_hashtab[PR_HASH_INDEX(pp, cp)], |
ph, ph_hashlist); |
ph, ph_hashlist); |
} |
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/* |
/* |
* Insert page header. |
* Insert page header. |
Line 1086 pool_prime_page(struct pool *pp, caddr_t |
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Line 1079 pool_prime_page(struct pool *pp, caddr_t |
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} |
} |
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/* |
/* |
* Like pool_prime(), except this is used by pool_get() when nitems |
* Used by pool_get() when nitems drops below the low water mark. This |
* drops below the low water mark. This is used to catch up nitmes |
* is used to catch up nitmes with the low water mark. |
* with the low water mark. |
|
* |
* |
* Note 1, we never wait for memory here, we let the caller decide what to do. |
* Note 1, we never wait for memory here, we let the caller decide what to do. |
* |
* |
Line 1100 pool_prime_page(struct pool *pp, caddr_t |
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Line 1092 pool_prime_page(struct pool *pp, caddr_t |
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static int |
static int |
pool_catchup(struct pool *pp) |
pool_catchup(struct pool *pp) |
{ |
{ |
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struct pool_item_header *ph; |
caddr_t cp; |
caddr_t cp; |
int error = 0; |
int error = 0; |
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Line 1115 pool_catchup(struct pool *pp) |
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Line 1108 pool_catchup(struct pool *pp) |
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return (0); |
return (0); |
} |
} |
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while (pp->pr_nitems < pp->pr_minitems) { |
while (POOL_NEEDS_CATCHUP(pp)) { |
/* |
/* |
* Call the page back-end allocator for more memory. |
* Call the page back-end allocator for more memory. |
* |
* |
Line 1123 pool_catchup(struct pool *pp) |
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Line 1116 pool_catchup(struct pool *pp) |
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* the pool descriptor? |
* the pool descriptor? |
*/ |
*/ |
simple_unlock(&pp->pr_slock); |
simple_unlock(&pp->pr_slock); |
cp = (*pp->pr_alloc)(pp->pr_pagesz, 0, pp->pr_mtype); |
cp = (*pp->pr_alloc)(pp->pr_pagesz, PR_NOWAIT, pp->pr_mtype); |
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if (__predict_true(cp != NULL)) |
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ph = pool_alloc_item_header(pp, cp, PR_NOWAIT); |
simple_lock(&pp->pr_slock); |
simple_lock(&pp->pr_slock); |
if (__predict_false(cp == NULL)) { |
if (__predict_false(cp == NULL || ph == NULL)) { |
|
if (cp != NULL) |
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(*pp->pr_free)(cp, pp->pr_pagesz, pp->pr_mtype); |
error = ENOMEM; |
error = ENOMEM; |
break; |
break; |
} |
} |
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pool_prime_page(pp, cp, ph); |
pp->pr_npagealloc++; |
pp->pr_npagealloc++; |
pool_prime_page(pp, cp); |
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} |
} |
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return (error); |
return (error); |
Line 1149 pool_setlowat(struct pool *pp, int n) |
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Line 1146 pool_setlowat(struct pool *pp, int n) |
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: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
|
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/* Make sure we're caught up with the newly-set low water mark. */ |
/* Make sure we're caught up with the newly-set low water mark. */ |
if ((pp->pr_nitems < pp->pr_minitems) && |
if (POOL_NEEDS_CATCHUP(pp) && (error = pool_catchup(pp) != 0)) { |
(error = pool_catchup(pp)) != 0) { |
|
/* |
/* |
* XXX: Should we log a warning? Should we set up a timeout |
* XXX: Should we log a warning? Should we set up a timeout |
* to try again in a second or so? The latter could break |
* to try again in a second or so? The latter could break |
Line 1240 pool_page_free_nointr(void *v, unsigned |
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Line 1236 pool_page_free_nointr(void *v, unsigned |
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* Release all complete pages that have not been used recently. |
* Release all complete pages that have not been used recently. |
*/ |
*/ |
void |
void |
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#ifdef DIAGNOSTIC |
_pool_reclaim(struct pool *pp, const char *file, long line) |
_pool_reclaim(struct pool *pp, const char *file, long line) |
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#else |
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pool_reclaim(struct pool *pp) |
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#endif |
{ |
{ |
struct pool_item_header *ph, *phnext; |
struct pool_item_header *ph, *phnext; |
struct pool_cache *pc; |
struct pool_cache *pc; |
Line 1306 pool_drain(void *arg) |
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Line 1306 pool_drain(void *arg) |
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struct pool *pp; |
struct pool *pp; |
int s; |
int s; |
|
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s = splimp(); |
s = splvm(); |
simple_lock(&pool_head_slock); |
simple_lock(&pool_head_slock); |
|
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if (drainpp == NULL && (drainpp = TAILQ_FIRST(&pool_head)) == NULL) |
if (drainpp == NULL && (drainpp = TAILQ_FIRST(&pool_head)) == NULL) |
Line 1331 pool_print(struct pool *pp, const char * |
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Line 1331 pool_print(struct pool *pp, const char * |
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{ |
{ |
int s; |
int s; |
|
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s = splimp(); |
s = splvm(); |
if (simple_lock_try(&pp->pr_slock) == 0) { |
if (simple_lock_try(&pp->pr_slock) == 0) { |
printf("pool %s is locked; try again later\n", |
printf("pool %s is locked; try again later\n", |
pp->pr_wchan); |
pp->pr_wchan); |
Line 1713 pool_cache_put(struct pool_cache *pc, vo |
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Line 1713 pool_cache_put(struct pool_cache *pc, vo |
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* Unable to allocate a cache group; destruct the object |
* Unable to allocate a cache group; destruct the object |
* and free it back to the pool. |
* and free it back to the pool. |
*/ |
*/ |
if (pc->pc_dtor != NULL) |
pool_cache_destruct_object(pc, object); |
(*pc->pc_dtor)(pc->pc_arg, object); |
|
pool_put(pc->pc_pool, object); |
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return; |
return; |
} |
} |
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Line 1730 pool_cache_put(struct pool_cache *pc, vo |
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Line 1728 pool_cache_put(struct pool_cache *pc, vo |
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} |
} |
|
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/* |
/* |
|
* 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) |
|
{ |
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if (pc->pc_dtor != NULL) |
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(*pc->pc_dtor)(pc->pc_arg, object); |
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pool_put(pc->pc_pool, object); |
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} |
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/* |
* pool_cache_do_invalidate: |
* pool_cache_do_invalidate: |
* |
* |
* This internal function implements pool_cache_invalidate() and |
* This internal function implements pool_cache_invalidate() and |
Line 1737 pool_cache_put(struct pool_cache *pc, vo |
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Line 1750 pool_cache_put(struct pool_cache *pc, vo |
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*/ |
*/ |
static void |
static void |
pool_cache_do_invalidate(struct pool_cache *pc, int free_groups, |
pool_cache_do_invalidate(struct pool_cache *pc, int free_groups, |
void (*putit)(struct pool *, void *, const char *, long)) |
void (*putit)(struct pool *, void *)) |
{ |
{ |
struct pool_cache_group *pcg, *npcg; |
struct pool_cache_group *pcg, *npcg; |
void *object; |
void *object; |
Line 1752 pool_cache_do_invalidate(struct pool_cac |
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Line 1765 pool_cache_do_invalidate(struct pool_cac |
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pc->pc_allocfrom = NULL; |
pc->pc_allocfrom = NULL; |
if (pc->pc_dtor != NULL) |
if (pc->pc_dtor != NULL) |
(*pc->pc_dtor)(pc->pc_arg, object); |
(*pc->pc_dtor)(pc->pc_arg, object); |
(*putit)(pc->pc_pool, object, __FILE__, __LINE__); |
(*putit)(pc->pc_pool, object); |
} |
} |
if (free_groups) { |
if (free_groups) { |
pc->pc_ngroups--; |
pc->pc_ngroups--; |
Line 1775 pool_cache_invalidate(struct pool_cache |
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Line 1788 pool_cache_invalidate(struct pool_cache |
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{ |
{ |
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simple_lock(&pc->pc_slock); |
simple_lock(&pc->pc_slock); |
pool_cache_do_invalidate(pc, 0, _pool_put); |
pool_cache_do_invalidate(pc, 0, pool_put); |
simple_unlock(&pc->pc_slock); |
simple_unlock(&pc->pc_slock); |
} |
} |
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