version 1.20, 1999/03/31 01:14:06 |
version 1.21, 1999/03/31 23:23:48 |
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* headed by `ph_itemlist' in each page header. The memory for building |
* headed by `ph_itemlist' in each page header. The memory for building |
* the page list is either taken from the allocated pages themselves (for |
* 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'). |
* small pool items) or taken from an internal pool of page headers (`phpool'). |
* |
|
*/ |
*/ |
|
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/* List of all pools */ |
/* List of all pools */ |
Line 107 static struct pool_item_header |
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Line 106 static struct pool_item_header |
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*pr_find_pagehead __P((struct pool *, caddr_t)); |
*pr_find_pagehead __P((struct pool *, caddr_t)); |
static void pr_rmpage __P((struct pool *, struct pool_item_header *)); |
static void pr_rmpage __P((struct pool *, struct pool_item_header *)); |
static int pool_catchup __P((struct pool *)); |
static int pool_catchup __P((struct pool *)); |
static int pool_prime_page __P((struct pool *, caddr_t)); |
static void pool_prime_page __P((struct pool *, caddr_t)); |
static void *pool_page_alloc __P((unsigned long, int, int)); |
static void *pool_page_alloc __P((unsigned long, int, int)); |
static void pool_page_free __P((void *, unsigned long, int)); |
static void pool_page_free __P((void *, unsigned long, int)); |
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#if defined(POOL_DIAGNOSTIC) || defined(DEBUG) |
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static void pool_print1 __P((struct pool *, const char *)); |
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#endif |
|
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#ifdef POOL_DIAGNOSTIC |
#ifdef POOL_DIAGNOSTIC |
/* |
/* |
|
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if ((pp->pr_roflags & PR_LOGGING) == 0) |
if ((pp->pr_roflags & PR_LOGGING) == 0) |
return; |
return; |
|
|
pool_print(pp, "printlog"); |
pool_print1(pp, "printlog"); |
|
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/* |
/* |
* Print all entries in this pool's log. |
* Print all entries in this pool's log. |
Line 252 pr_rmpage(pp, ph) |
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Line 254 pr_rmpage(pp, ph) |
|
pp->pr_npages--; |
pp->pr_npages--; |
pp->pr_npagefree++; |
pp->pr_npagefree++; |
|
|
if ((pp->pr_roflags & PR_PHINPAGE) == 0) { |
|
LIST_REMOVE(ph, ph_hashlist); |
|
pool_put(&phpool, ph); |
|
} |
|
|
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if (pp->pr_curpage == ph) { |
if (pp->pr_curpage == ph) { |
/* |
/* |
* Find a new non-empty page header, if any. |
* Find a new non-empty page header, if any. |
Line 270 pr_rmpage(pp, ph) |
|
Line 267 pr_rmpage(pp, ph) |
|
|
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pp->pr_curpage = ph; |
pp->pr_curpage = ph; |
} |
} |
|
|
|
if ((pp->pr_roflags & PR_PHINPAGE) == 0) { |
|
LIST_REMOVE(ph, ph_hashlist); |
|
pool_put(&phpool, ph); |
|
} |
} |
} |
|
|
/* |
/* |
Line 281 pool_create(size, align, ioff, nitems, w |
|
Line 283 pool_create(size, align, ioff, nitems, w |
|
u_int align; |
u_int align; |
u_int ioff; |
u_int ioff; |
int nitems; |
int nitems; |
char *wchan; |
const char *wchan; |
size_t pagesz; |
size_t pagesz; |
void *(*alloc) __P((unsigned long, int, int)); |
void *(*alloc) __P((unsigned long, int, int)); |
void (*release) __P((void *, unsigned long, int)); |
void (*release) __P((void *, unsigned long, int)); |
Line 326 pool_init(pp, size, align, ioff, flags, |
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Line 328 pool_init(pp, size, align, ioff, flags, |
|
u_int align; |
u_int align; |
u_int ioff; |
u_int ioff; |
int flags; |
int flags; |
char *wchan; |
const char *wchan; |
size_t pagesz; |
size_t pagesz; |
void *(*alloc) __P((unsigned long, int, int)); |
void *(*alloc) __P((unsigned long, int, int)); |
void (*release) __P((void *, unsigned long, int)); |
void (*release) __P((void *, unsigned long, int)); |
Line 445 pool_init(pp, size, align, ioff, flags, |
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Line 447 pool_init(pp, size, align, ioff, flags, |
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} |
} |
#endif |
#endif |
|
|
simple_lock_init(&pp->pr_lock); |
simple_lock_init(&pp->pr_slock); |
lockinit(&pp->pr_resourcelock, PSWP, wchan, 0, 0); |
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|
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/* |
/* |
* Initialize private page header pool if we haven't done so yet. |
* Initialize private page header pool if we haven't done so yet. |
Line 526 pool_get(pp, flags) |
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Line 527 pool_get(pp, flags) |
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if (curproc == NULL && (flags & PR_WAITOK) != 0) |
if (curproc == NULL && (flags & PR_WAITOK) != 0) |
panic("pool_get: must have NOWAIT"); |
panic("pool_get: must have NOWAIT"); |
|
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simple_lock(&pp->pr_lock); |
simple_lock(&pp->pr_slock); |
|
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startover: |
startover: |
/* |
/* |
Line 536 pool_get(pp, flags) |
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Line 537 pool_get(pp, flags) |
|
*/ |
*/ |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (pp->pr_nout > pp->pr_hardlimit) { |
if (pp->pr_nout > pp->pr_hardlimit) { |
simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_slock); |
panic("pool_get: %s: crossed hard limit", pp->pr_wchan); |
panic("pool_get: %s: crossed hard limit", pp->pr_wchan); |
} |
} |
#endif |
#endif |
Line 547 pool_get(pp, flags) |
|
Line 548 pool_get(pp, flags) |
|
* it be? |
* it be? |
*/ |
*/ |
pp->pr_flags |= PR_WANTED; |
pp->pr_flags |= PR_WANTED; |
simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_slock); |
tsleep((caddr_t)pp, PSWP, pp->pr_wchan, 0); |
tsleep((caddr_t)pp, PSWP, pp->pr_wchan, 0); |
simple_lock(&pp->pr_lock); |
simple_lock(&pp->pr_slock); |
goto startover; |
goto startover; |
} |
} |
if (pp->pr_hardlimit_warning != NULL) { |
if (pp->pr_hardlimit_warning != NULL) { |
Line 567 pool_get(pp, flags) |
|
Line 568 pool_get(pp, flags) |
|
log(LOG_ERR, "%s\n", pp->pr_hardlimit_warning); |
log(LOG_ERR, "%s\n", pp->pr_hardlimit_warning); |
} |
} |
} |
} |
simple_unlock(&pp->pr_lock); |
|
|
if (flags & PR_URGENT) |
|
panic("pool_get: urgent"); |
|
|
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pp->pr_nfail++; |
|
|
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simple_unlock(&pp->pr_slock); |
return (NULL); |
return (NULL); |
} |
} |
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Line 579 pool_get(pp, flags) |
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Line 586 pool_get(pp, flags) |
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*/ |
*/ |
if ((ph = pp->pr_curpage) == NULL) { |
if ((ph = pp->pr_curpage) == NULL) { |
void *v; |
void *v; |
int lkflags = LK_EXCLUSIVE | LK_INTERLOCK | |
|
((flags & PR_WAITOK) == 0 ? LK_NOWAIT : 0); |
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|
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#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (pp->pr_nitems != 0) { |
if (pp->pr_nitems != 0) { |
simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_slock); |
printf("pool_get: %s: curpage NULL, nitems %u\n", |
printf("pool_get: %s: curpage NULL, nitems %u\n", |
pp->pr_wchan, pp->pr_nitems); |
pp->pr_wchan, pp->pr_nitems); |
panic("pool_get: nitems inconsistent\n"); |
panic("pool_get: nitems inconsistent\n"); |
} |
} |
#endif |
#endif |
|
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/* Get long-term lock on pool */ |
/* |
if (lockmgr(&pp->pr_resourcelock, lkflags, &pp->pr_lock) != 0) |
* Call the back-end page allocator for more memory. |
return (NULL); |
* Release the pool lock, as the back-end page allocator |
|
* may block. |
/* Check if pool became non-empty while we slept */ |
*/ |
if ((ph = pp->pr_curpage) != NULL) |
simple_unlock(&pp->pr_slock); |
goto again; |
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|
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/* Call the page back-end allocator for more memory */ |
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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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simple_lock(&pp->pr_slock); |
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if (v == NULL) { |
if (v == NULL) { |
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/* |
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* We were unable to allocate a page, but |
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* we released the lock during allocation, |
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* so perhaps items were freed back to the |
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* pool. Check for this case. |
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*/ |
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if (pp->pr_curpage != NULL) |
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goto startover; |
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if (flags & PR_URGENT) |
if (flags & PR_URGENT) |
panic("pool_get: urgent"); |
panic("pool_get: urgent"); |
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if ((flags & PR_WAITOK) == 0) { |
if ((flags & PR_WAITOK) == 0) { |
pp->pr_nfail++; |
pp->pr_nfail++; |
lockmgr(&pp->pr_resourcelock, LK_RELEASE, NULL); |
simple_unlock(&pp->pr_slock); |
return (NULL); |
return (NULL); |
} |
} |
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/* |
/* |
* Wait for items to be returned to this pool. |
* Wait for items to be returned to this pool. |
|
* |
* XXX: we actually want to wait just until |
* XXX: we actually want to wait just until |
* the page allocator has memory again. Depending |
* the page allocator has memory again. Depending |
* on this pool's usage, we might get stuck here |
* on this pool's usage, we might get stuck here |
Line 620 pool_get(pp, flags) |
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Line 635 pool_get(pp, flags) |
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* XXX: maybe we should wake up once a second and |
* XXX: maybe we should wake up once a second and |
* try again? |
* try again? |
*/ |
*/ |
simple_lock(&pp->pr_lock); |
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(void) lockmgr(&pp->pr_resourcelock, LK_RELEASE, NULL); |
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pp->pr_flags |= PR_WANTED; |
pp->pr_flags |= PR_WANTED; |
simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_slock); |
tsleep((caddr_t)pp, PSWP, pp->pr_wchan, 0); |
tsleep((caddr_t)pp, PSWP, pp->pr_wchan, 0); |
simple_lock(&pp->pr_lock); |
simple_lock(&pp->pr_slock); |
goto startover; |
goto startover; |
} |
} |
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Line 633 pool_get(pp, flags) |
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Line 646 pool_get(pp, flags) |
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pp->pr_npagealloc++; |
pp->pr_npagealloc++; |
pool_prime_page(pp, v); |
pool_prime_page(pp, v); |
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again: |
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/* Re-acquire pool interlock */ |
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simple_lock(&pp->pr_lock); |
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lockmgr(&pp->pr_resourcelock, LK_RELEASE, NULL); |
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/* Start the allocation process over. */ |
/* Start the allocation process over. */ |
goto startover; |
goto startover; |
} |
} |
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if ((v = pi = TAILQ_FIRST(&ph->ph_itemlist)) == NULL) |
if ((v = pi = TAILQ_FIRST(&ph->ph_itemlist)) == NULL) { |
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simple_unlock(&pp->pr_slock); |
panic("pool_get: %s: page empty", pp->pr_wchan); |
panic("pool_get: %s: page empty", pp->pr_wchan); |
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} |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
if (pp->pr_nitems == 0) { |
if (pp->pr_nitems == 0) { |
simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_slock); |
printf("pool_get: %s: items on itemlist, nitems %u\n", |
printf("pool_get: %s: items on itemlist, nitems %u\n", |
pp->pr_wchan, pp->pr_nitems); |
pp->pr_wchan, pp->pr_nitems); |
panic("pool_get: nitems inconsistent\n"); |
panic("pool_get: nitems inconsistent\n"); |
Line 678 pool_get(pp, flags) |
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Line 688 pool_get(pp, flags) |
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} |
} |
ph->ph_nmissing++; |
ph->ph_nmissing++; |
if (TAILQ_FIRST(&ph->ph_itemlist) == NULL) { |
if (TAILQ_FIRST(&ph->ph_itemlist) == NULL) { |
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#ifdef DIAGNOSTIC |
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if (ph->ph_nmissing != pp->pr_itemsperpage) { |
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simple_unlock(&pp->pr_slock); |
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panic("pool_get: %s: nmissing inconsistent", |
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pp->pr_wchan); |
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} |
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#endif |
/* |
/* |
* Find a new non-empty page header, if any. |
* Find a new non-empty page header, if any. |
* Start search from the page head, to increase |
* Start search from the page head, to increase |
* the chance for "high water" pages to be freed. |
* the chance for "high water" pages to be freed. |
* |
* |
* First, move the now empty page to the head of |
* Migrate empty pages to the end of the list. This |
* the page list. |
* will speed the update of curpage as pages become |
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* idle. Empty pages intermingled with idle pages |
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* is no big deal. As soon as a page becomes un-empty, |
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* it will move back to the head of the list. |
*/ |
*/ |
TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); |
TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); |
TAILQ_INSERT_HEAD(&pp->pr_pagelist, ph, ph_pagelist); |
TAILQ_INSERT_TAIL(&pp->pr_pagelist, ph, ph_pagelist); |
while ((ph = TAILQ_NEXT(ph, ph_pagelist)) != NULL) |
for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; |
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ph = TAILQ_NEXT(ph, ph_pagelist)) |
if (TAILQ_FIRST(&ph->ph_itemlist) != NULL) |
if (TAILQ_FIRST(&ph->ph_itemlist) != NULL) |
break; |
break; |
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Line 709 pool_get(pp, flags) |
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Line 730 pool_get(pp, flags) |
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*/ |
*/ |
} |
} |
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simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_slock); |
return (v); |
return (v); |
} |
} |
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struct pool_item *pi = v; |
struct pool_item *pi = v; |
struct pool_item_header *ph; |
struct pool_item_header *ph; |
caddr_t page; |
caddr_t page; |
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int s; |
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page = (caddr_t)((u_long)v & pp->pr_pagemask); |
page = (caddr_t)((u_long)v & pp->pr_pagemask); |
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simple_lock(&pp->pr_lock); |
simple_lock(&pp->pr_slock); |
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pr_log(pp, v, PRLOG_PUT, file, line); |
pr_log(pp, v, PRLOG_PUT, file, line); |
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pp->pr_flags &= ~PR_WANTED; |
pp->pr_flags &= ~PR_WANTED; |
if (ph->ph_nmissing == 0) |
if (ph->ph_nmissing == 0) |
pp->pr_nidle++; |
pp->pr_nidle++; |
|
simple_unlock(&pp->pr_slock); |
wakeup((caddr_t)pp); |
wakeup((caddr_t)pp); |
simple_unlock(&pp->pr_lock); |
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return; |
return; |
} |
} |
|
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/* |
/* |
* If this page is now complete, move it to the end of the pagelist. |
* If this page is now complete, do one of two things: |
* If this page has just become un-empty, move it the head. |
* |
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* (1) If we have more pages than the page high water |
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* mark, free the page back to the system. |
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* |
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* (2) Move it to the end of the page list, so that |
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* we minimize our chances of fragmenting the |
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* pool. Idle pages migrate to the end (along with |
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* completely empty pages, so that we find un-empty |
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* pages more quickly when we update curpage) of the |
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* list so they can be more easily swept up by |
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* the pagedaemon when pages are scarce. |
*/ |
*/ |
if (ph->ph_nmissing == 0) { |
if (ph->ph_nmissing == 0) { |
pp->pr_nidle++; |
pp->pr_nidle++; |
if (pp->pr_npages > pp->pr_maxpages) { |
if (pp->pr_npages > pp->pr_maxpages) { |
#if 0 |
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timeout(pool_drain, 0, pool_inactive_time*hz); |
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#else |
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pr_rmpage(pp, ph); |
pr_rmpage(pp, ph); |
#endif |
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} else { |
} else { |
TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); |
TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); |
TAILQ_INSERT_TAIL(&pp->pr_pagelist, ph, ph_pagelist); |
TAILQ_INSERT_TAIL(&pp->pr_pagelist, ph, ph_pagelist); |
ph->ph_time = time; |
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/* XXX - update curpage */ |
/* |
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* Update the timestamp on the page. A page must |
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* be idle for some period of time before it can |
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* be reclaimed by the pagedaemon. This minimizes |
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* ping-pong'ing for memory. |
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*/ |
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s = splclock(); |
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ph->ph_time = mono_time; |
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splx(s); |
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/* |
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* Update the current page pointer. Just look for |
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* the first page with any free items. |
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* |
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* XXX: Maybe we want an option to look for the |
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* page with the fewest available items, to minimize |
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* fragmentation? |
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*/ |
for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; |
for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; |
ph = TAILQ_NEXT(ph, ph_pagelist)) |
ph = TAILQ_NEXT(ph, ph_pagelist)) |
if (TAILQ_FIRST(&ph->ph_itemlist) != NULL) |
if (TAILQ_FIRST(&ph->ph_itemlist) != NULL) |
|
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pp->pr_curpage = ph; |
pp->pr_curpage = ph; |
} |
} |
} |
} |
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/* |
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* If the page has just become un-empty, move it to the head of |
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* the list, and make it the current page. The next allocation |
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* will get the item from this page, instead of further fragmenting |
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* the pool. |
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*/ |
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else if (ph->ph_nmissing == (pp->pr_itemsperpage - 1)) { |
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TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); |
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TAILQ_INSERT_HEAD(&pp->pr_pagelist, ph, ph_pagelist); |
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pp->pr_curpage = ph; |
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} |
|
|
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simple_unlock(&pp->pr_slock); |
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simple_unlock(&pp->pr_lock); |
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} |
} |
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/* |
/* |
Line 818 pool_prime(pp, n, storage) |
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Line 874 pool_prime(pp, n, storage) |
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/* !storage && static caught below */ |
/* !storage && static caught below */ |
#endif |
#endif |
|
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(void)lockmgr(&pp->pr_resourcelock, LK_EXCLUSIVE, NULL); |
simple_lock(&pp->pr_slock); |
|
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newnitems = pp->pr_minitems + n; |
newnitems = pp->pr_minitems + n; |
newpages = |
newpages = |
roundup(newnitems, pp->pr_itemsperpage) / pp->pr_itemsperpage |
roundup(newnitems, pp->pr_itemsperpage) / pp->pr_itemsperpage |
- pp->pr_minpages; |
- pp->pr_minpages; |
|
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while (newpages-- > 0) { |
while (newpages-- > 0) { |
|
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if (pp->pr_roflags & PR_STATIC) { |
if (pp->pr_roflags & PR_STATIC) { |
cp = storage; |
cp = storage; |
storage += pp->pr_pagesz; |
storage += pp->pr_pagesz; |
} else { |
} else { |
|
simple_unlock(&pp->pr_slock); |
cp = (*pp->pr_alloc)(pp->pr_pagesz, 0, pp->pr_mtype); |
cp = (*pp->pr_alloc)(pp->pr_pagesz, 0, pp->pr_mtype); |
|
simple_lock(&pp->pr_slock); |
} |
} |
|
|
if (cp == NULL) { |
if (cp == NULL) { |
(void)lockmgr(&pp->pr_resourcelock, LK_RELEASE, NULL); |
simple_unlock(&pp->pr_slock); |
return (ENOMEM); |
return (ENOMEM); |
} |
} |
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Line 847 pool_prime(pp, n, storage) |
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Line 905 pool_prime(pp, n, storage) |
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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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(void)lockmgr(&pp->pr_resourcelock, LK_RELEASE, NULL); |
simple_unlock(&pp->pr_slock); |
return (0); |
return (0); |
} |
} |
|
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/* |
/* |
* Add a page worth of items to the pool. |
* Add a page worth of items to the pool. |
|
* |
|
* Note, we must be called with the pool descriptor LOCKED. |
*/ |
*/ |
static int |
static void |
pool_prime_page(pp, storage) |
pool_prime_page(pp, storage) |
struct pool *pp; |
struct pool *pp; |
caddr_t storage; |
caddr_t storage; |
Line 866 pool_prime_page(pp, storage) |
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Line 926 pool_prime_page(pp, storage) |
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unsigned int ioff = pp->pr_itemoffset; |
unsigned int ioff = pp->pr_itemoffset; |
int n; |
int n; |
|
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simple_lock(&pp->pr_lock); |
|
|
|
if ((pp->pr_roflags & PR_PHINPAGE) != 0) { |
if ((pp->pr_roflags & PR_PHINPAGE) != 0) { |
ph = (struct pool_item_header *)(cp + pp->pr_phoffset); |
ph = (struct pool_item_header *)(cp + pp->pr_phoffset); |
} else { |
} else { |
Line 883 pool_prime_page(pp, storage) |
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Line 941 pool_prime_page(pp, storage) |
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TAILQ_INIT(&ph->ph_itemlist); |
TAILQ_INIT(&ph->ph_itemlist); |
ph->ph_page = storage; |
ph->ph_page = storage; |
ph->ph_nmissing = 0; |
ph->ph_nmissing = 0; |
ph->ph_time.tv_sec = ph->ph_time.tv_usec = 0; |
memset(&ph->ph_time, 0, sizeof(ph->ph_time)); |
|
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pp->pr_nidle++; |
pp->pr_nidle++; |
|
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Line 925 pool_prime_page(pp, storage) |
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Line 983 pool_prime_page(pp, storage) |
|
|
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if (++pp->pr_npages > pp->pr_hiwat) |
if (++pp->pr_npages > pp->pr_hiwat) |
pp->pr_hiwat = pp->pr_npages; |
pp->pr_hiwat = pp->pr_npages; |
|
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simple_unlock(&pp->pr_lock); |
|
return (0); |
|
} |
} |
|
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/* |
/* |
Line 935 pool_prime_page(pp, storage) |
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Line 990 pool_prime_page(pp, storage) |
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* drops below the low water mark. This is used to catch up nitmes |
* drops below the low water mark. This is used to catch up nitmes |
* with the low water mark. |
* with the low water mark. |
* |
* |
* Note 1, we never wait for memory or locks here, we let the caller |
* Note 1, we never wait for memory here, we let the caller decide what to do. |
* decide what to do. |
|
* |
* |
* Note 2, this doesn't work with static pools. |
* Note 2, this doesn't work with static pools. |
* |
* |
Line 949 pool_catchup(pp) |
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Line 1003 pool_catchup(pp) |
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{ |
{ |
caddr_t cp; |
caddr_t cp; |
int error = 0; |
int error = 0; |
u_long nitems; |
|
|
|
if (pp->pr_roflags & PR_STATIC) { |
if (pp->pr_roflags & PR_STATIC) { |
/* |
/* |
* We dropped below the low water mark, and this is not a |
* We dropped below the low water mark, and this is not a |
* good thing. Log a warning. |
* good thing. Log a warning. |
|
* |
|
* XXX: rate-limit this? |
*/ |
*/ |
printf("WARNING: static pool `%s' dropped below low water " |
printf("WARNING: static pool `%s' dropped below low water " |
"mark\n", pp->pr_wchan); |
"mark\n", pp->pr_wchan); |
return (0); |
return (0); |
} |
} |
|
|
for (;;) { |
while (pp->pr_nitems < pp->pr_minitems) { |
/* |
/* |
* Pool is locked; get the current number of items |
* Call the page back-end allocator for more memory. |
* availabler. |
* |
|
* XXX: We never wait, so should we bother unlocking |
|
* the pool descriptor? |
*/ |
*/ |
nitems = pp->pr_nitems; |
simple_unlock(&pp->pr_slock); |
|
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/* Acquire the resource lock and release the interlock. */ |
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error = lockmgr(&pp->pr_resourcelock, |
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LK_EXCLUSIVE | LK_INTERLOCK | LK_NOWAIT, &pp->pr_lock); |
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if (error) |
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break; |
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|
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if (nitems >= pp->pr_minitems) { |
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simple_lock(&pp->pr_lock); |
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(void) lockmgr(&pp->pr_resourcelock, LK_RELEASE, |
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NULL); |
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break; |
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} |
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|
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/* Call the page back-end allocator for more memory. */ |
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cp = (*pp->pr_alloc)(pp->pr_pagesz, 0, pp->pr_mtype); |
cp = (*pp->pr_alloc)(pp->pr_pagesz, 0, pp->pr_mtype); |
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simple_lock(&pp->pr_slock); |
if (cp == NULL) { |
if (cp == NULL) { |
simple_lock(&pp->pr_lock); |
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(void) lockmgr(&pp->pr_resourcelock, LK_RELEASE, |
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NULL); |
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error = ENOMEM; |
error = ENOMEM; |
break; |
break; |
} |
} |
|
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pool_prime_page(pp, cp); |
pool_prime_page(pp, cp); |
|
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simple_lock(&pp->pr_lock); |
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(void) lockmgr(&pp->pr_resourcelock, LK_RELEASE, |
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NULL); |
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} |
} |
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return (error); |
return (error); |
Line 1008 pool_setlowat(pp, n) |
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Line 1043 pool_setlowat(pp, n) |
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{ |
{ |
int error; |
int error; |
|
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(void)lockmgr(&pp->pr_resourcelock, LK_EXCLUSIVE, NULL); |
simple_lock(&pp->pr_slock); |
|
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pp->pr_minitems = n; |
pp->pr_minitems = n; |
pp->pr_minpages = (n == 0) |
pp->pr_minpages = (n == 0) |
? 0 |
? 0 |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
(void)lockmgr(&pp->pr_resourcelock, LK_RELEASE, NULL); |
|
|
|
/* 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. */ |
simple_lock(&pp->pr_lock); |
if ((error = pool_catchup(pp)) != 0) { |
error = pool_catchup(pp); |
|
simple_unlock(&pp->pr_lock); |
|
|
|
if (error) { |
|
/* |
/* |
* 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 |
* a caller's assumptions about interrupt protection, etc. |
* a caller's assumptions about interrupt protection, etc. |
*/ |
*/ |
} |
} |
|
|
|
simple_unlock(&pp->pr_slock); |
} |
} |
|
|
void |
void |
Line 1035 pool_sethiwat(pp, n) |
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Line 1068 pool_sethiwat(pp, n) |
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int n; |
int n; |
{ |
{ |
|
|
(void)lockmgr(&pp->pr_resourcelock, LK_EXCLUSIVE, NULL); |
simple_lock(&pp->pr_slock); |
|
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pp->pr_maxpages = (n == 0) |
pp->pr_maxpages = (n == 0) |
? 0 |
? 0 |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
(void)lockmgr(&pp->pr_resourcelock, LK_RELEASE, NULL); |
|
|
simple_unlock(&pp->pr_slock); |
} |
} |
|
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void |
void |
Line 1050 pool_sethardlimit(pp, n, warnmess, ratec |
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Line 1085 pool_sethardlimit(pp, n, warnmess, ratec |
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int ratecap; |
int ratecap; |
{ |
{ |
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simple_lock(&pp->pr_lock); |
simple_lock(&pp->pr_slock); |
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pp->pr_hardlimit = n; |
pp->pr_hardlimit = n; |
pp->pr_hardlimit_warning = warnmess; |
pp->pr_hardlimit_warning = warnmess; |
Line 1059 pool_sethardlimit(pp, n, warnmess, ratec |
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Line 1094 pool_sethardlimit(pp, n, warnmess, ratec |
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sizeof(pp->pr_hardlimit_warning_last)); |
sizeof(pp->pr_hardlimit_warning_last)); |
|
|
/* |
/* |
* In-line version of pool_sethiwat(), because we need to release |
* In-line version of pool_sethiwat(), because we don't want to |
* the interlock. |
* release the lock. |
*/ |
*/ |
(void)lockmgr(&pp->pr_resourcelock, LK_EXCLUSIVE | LK_INTERLOCK, |
|
&pp->pr_lock); |
|
pp->pr_maxpages = (n == 0) |
pp->pr_maxpages = (n == 0) |
? 0 |
? 0 |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
: roundup(n, pp->pr_itemsperpage) / pp->pr_itemsperpage; |
(void)lockmgr(&pp->pr_resourcelock, LK_RELEASE, NULL); |
|
|
simple_unlock(&pp->pr_slock); |
} |
} |
|
|
/* |
/* |
Line 1106 pool_page_alloc_nointr(sz, flags, mtype) |
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Line 1140 pool_page_alloc_nointr(sz, flags, mtype) |
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{ |
{ |
boolean_t waitok = (flags & PR_WAITOK) ? TRUE : FALSE; |
boolean_t waitok = (flags & PR_WAITOK) ? TRUE : FALSE; |
|
|
/* |
|
* With UVM, we can use the kernel_map. |
|
*/ |
|
return ((void *)uvm_km_alloc_poolpage1(kernel_map, uvm.kernel_object, |
return ((void *)uvm_km_alloc_poolpage1(kernel_map, uvm.kernel_object, |
waitok)); |
waitok)); |
} |
} |
Line 1128 pool_page_free_nointr(v, sz, mtype) |
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Line 1159 pool_page_free_nointr(v, sz, mtype) |
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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 |
pool_reclaim (pp) |
pool_reclaim(pp) |
pool_handle_t pp; |
pool_handle_t pp; |
{ |
{ |
struct pool_item_header *ph, *phnext; |
struct pool_item_header *ph, *phnext; |
struct timeval curtime = time; |
struct timeval curtime; |
|
int s; |
|
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if (pp->pr_roflags & PR_STATIC) |
if (pp->pr_roflags & PR_STATIC) |
return; |
return; |
|
|
if (simple_lock_try(&pp->pr_lock) == 0) |
if (simple_lock_try(&pp->pr_slock) == 0) |
return; |
return; |
|
|
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s = splclock(); |
|
curtime = mono_time; |
|
splx(s); |
|
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for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; ph = phnext) { |
for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; ph = phnext) { |
phnext = TAILQ_NEXT(ph, ph_pagelist); |
phnext = TAILQ_NEXT(ph, ph_pagelist); |
|
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Line 1152 pool_reclaim (pp) |
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Line 1188 pool_reclaim (pp) |
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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) |
continue; |
continue; |
|
|
|
/* |
|
* If freeing this page would put us below |
|
* the low water mark, stop now. |
|
*/ |
|
if ((pp->pr_nitems - pp->pr_itemsperpage) < |
|
pp->pr_minitems) |
|
break; |
|
|
pr_rmpage(pp, ph); |
pr_rmpage(pp, ph); |
} |
} |
} |
} |
|
|
simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_slock); |
} |
} |
|
|
|
|
/* |
/* |
* Drain pools, one at a time. |
* Drain pools, one at a time. |
|
* |
|
* Note, we must never be called from an interrupt context. |
*/ |
*/ |
void |
void |
pool_drain(arg) |
pool_drain(arg) |
Line 1192 pool_drain(arg) |
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Line 1239 pool_drain(arg) |
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void |
void |
pool_print(pp, label) |
pool_print(pp, label) |
struct pool *pp; |
struct pool *pp; |
char *label; |
const char *label; |
|
{ |
|
int s; |
|
|
|
s = splimp(); |
|
simple_lock(&pp->pr_slock); |
|
pool_print1(pp, label); |
|
simple_unlock(&pp->pr_slock); |
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splx(s); |
|
} |
|
|
|
static void |
|
pool_print1(pp, label) |
|
struct pool *pp; |
|
const char *label; |
{ |
{ |
|
|
if (label != NULL) |
if (label != NULL) |
Line 1221 pool_chk(pp, label) |
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Line 1282 pool_chk(pp, label) |
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struct pool_item_header *ph; |
struct pool_item_header *ph; |
int r = 0; |
int r = 0; |
|
|
simple_lock(&pp->pr_lock); |
simple_lock(&pp->pr_slock); |
|
|
for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; |
for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; |
ph = TAILQ_NEXT(ph, ph_pagelist)) { |
ph = TAILQ_NEXT(ph, ph_pagelist)) { |
Line 1274 pool_chk(pp, label) |
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Line 1335 pool_chk(pp, label) |
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} |
} |
} |
} |
out: |
out: |
simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_slock); |
return (r); |
return (r); |
} |
} |
#endif /* POOL_DIAGNOSTIC || DEBUG */ |
#endif /* POOL_DIAGNOSTIC || DEBUG */ |