| version 1.20, 1999/03/31 01:14:06 |
version 1.21, 1999/03/31 23:23:48 |
|
|
| * 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'). |
| * |
|
| */ |
*/ |
| |
|
| /* List of all pools */ |
/* List of all pools */ |
| Line 107 static struct pool_item_header |
|
| Line 106 static struct pool_item_header |
|
| *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)); |
| |
|
| |
#if defined(POOL_DIAGNOSTIC) || defined(DEBUG) |
| |
static void pool_print1 __P((struct pool *, const char *)); |
| |
#endif |
| |
|
| #ifdef POOL_DIAGNOSTIC |
#ifdef POOL_DIAGNOSTIC |
| /* |
/* |
|
|
| if ((pp->pr_roflags & PR_LOGGING) == 0) |
if ((pp->pr_roflags & PR_LOGGING) == 0) |
| return; |
return; |
| |
|
| pool_print(pp, "printlog"); |
pool_print1(pp, "printlog"); |
| |
|
| /* |
/* |
| * Print all entries in this pool's log. |
* Print all entries in this pool's log. |
| Line 252 pr_rmpage(pp, ph) |
|
| 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); |
|
| } |
|
| |
|
| 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) |
|
| |
|
| 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, |
|
| 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, |
|
| Line 447 pool_init(pp, size, align, ioff, flags, |
|
| } |
} |
| #endif |
#endif |
| |
|
| simple_lock_init(&pp->pr_lock); |
simple_lock_init(&pp->pr_slock); |
| lockinit(&pp->pr_resourcelock, PSWP, wchan, 0, 0); |
|
| |
|
| /* |
/* |
| * 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) |
|
| Line 527 pool_get(pp, flags) |
|
| 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"); |
| |
|
| simple_lock(&pp->pr_lock); |
simple_lock(&pp->pr_slock); |
| |
|
| startover: |
startover: |
| /* |
/* |
| Line 536 pool_get(pp, flags) |
|
| 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"); |
| |
|
| |
pp->pr_nfail++; |
| |
|
| |
simple_unlock(&pp->pr_slock); |
| return (NULL); |
return (NULL); |
| } |
} |
| |
|
| Line 579 pool_get(pp, flags) |
|
| Line 586 pool_get(pp, flags) |
|
| */ |
*/ |
| 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); |
|
| |
|
| #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 |
| |
|
| /* 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; |
|
| |
|
| /* Call the page back-end allocator for more memory */ |
|
| v = (*pp->pr_alloc)(pp->pr_pagesz, flags, pp->pr_mtype); |
v = (*pp->pr_alloc)(pp->pr_pagesz, flags, pp->pr_mtype); |
| |
simple_lock(&pp->pr_slock); |
| |
|
| if (v == NULL) { |
if (v == NULL) { |
| |
/* |
| |
* We were unable to allocate a page, but |
| |
* we released the lock during allocation, |
| |
* so perhaps items were freed back to the |
| |
* pool. Check for this case. |
| |
*/ |
| |
if (pp->pr_curpage != NULL) |
| |
goto startover; |
| |
|
| if (flags & PR_URGENT) |
if (flags & PR_URGENT) |
| panic("pool_get: urgent"); |
panic("pool_get: urgent"); |
| |
|
| 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); |
| } |
} |
| |
|
| /* |
/* |
| * 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) |
|
| Line 635 pool_get(pp, flags) |
|
| * 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); |
|
| (void) lockmgr(&pp->pr_resourcelock, LK_RELEASE, NULL); |
|
| 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; |
| } |
} |
| |
|
| Line 633 pool_get(pp, flags) |
|
| Line 646 pool_get(pp, flags) |
|
| pp->pr_npagealloc++; |
pp->pr_npagealloc++; |
| pool_prime_page(pp, v); |
pool_prime_page(pp, v); |
| |
|
| again: |
|
| /* Re-acquire pool interlock */ |
|
| simple_lock(&pp->pr_lock); |
|
| lockmgr(&pp->pr_resourcelock, LK_RELEASE, NULL); |
|
| |
|
| /* Start the allocation process over. */ |
/* Start the allocation process over. */ |
| goto startover; |
goto startover; |
| } |
} |
| |
|
| if ((v = pi = TAILQ_FIRST(&ph->ph_itemlist)) == NULL) |
if ((v = pi = TAILQ_FIRST(&ph->ph_itemlist)) == NULL) { |
| |
simple_unlock(&pp->pr_slock); |
| panic("pool_get: %s: page empty", pp->pr_wchan); |
panic("pool_get: %s: page empty", pp->pr_wchan); |
| |
} |
| #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) |
|
| Line 688 pool_get(pp, flags) |
|
| } |
} |
| ph->ph_nmissing++; |
ph->ph_nmissing++; |
| if (TAILQ_FIRST(&ph->ph_itemlist) == NULL) { |
if (TAILQ_FIRST(&ph->ph_itemlist) == NULL) { |
| |
#ifdef DIAGNOSTIC |
| |
if (ph->ph_nmissing != pp->pr_itemsperpage) { |
| |
simple_unlock(&pp->pr_slock); |
| |
panic("pool_get: %s: nmissing inconsistent", |
| |
pp->pr_wchan); |
| |
} |
| |
#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 |
| |
* idle. Empty pages intermingled with idle pages |
| |
* is no big deal. As soon as a page becomes un-empty, |
| |
* it will move back to the head of the list. |
| */ |
*/ |
| 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; |
| |
ph = TAILQ_NEXT(ph, ph_pagelist)) |
| if (TAILQ_FIRST(&ph->ph_itemlist) != NULL) |
if (TAILQ_FIRST(&ph->ph_itemlist) != NULL) |
| break; |
break; |
| |
|
| Line 709 pool_get(pp, flags) |
|
| Line 730 pool_get(pp, flags) |
|
| */ |
*/ |
| } |
} |
| |
|
| simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_slock); |
| return (v); |
return (v); |
| } |
} |
| |
|
|
|
| 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; |
| |
int s; |
| |
|
| page = (caddr_t)((u_long)v & pp->pr_pagemask); |
page = (caddr_t)((u_long)v & pp->pr_pagemask); |
| |
|
| simple_lock(&pp->pr_lock); |
simple_lock(&pp->pr_slock); |
| |
|
| pr_log(pp, v, PRLOG_PUT, file, line); |
pr_log(pp, v, PRLOG_PUT, file, line); |
| |
|
|
|
| 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); |
|
| return; |
return; |
| } |
} |
| |
|
| /* |
/* |
| * 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. |
* |
| |
* (1) If we have more pages than the page high water |
| |
* mark, free the page back to the system. |
| |
* |
| |
* (2) Move it to the end of the page list, so that |
| |
* we minimize our chances of fragmenting the |
| |
* pool. Idle pages migrate to the end (along with |
| |
* completely empty pages, so that we find un-empty |
| |
* pages more quickly when we update curpage) of the |
| |
* list so they can be more easily swept up by |
| |
* the pagedaemon when pages are scarce. |
| */ |
*/ |
| 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 |
|
| timeout(pool_drain, 0, pool_inactive_time*hz); |
|
| #else |
|
| pr_rmpage(pp, ph); |
pr_rmpage(pp, ph); |
| #endif |
|
| } 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; |
|
| |
|
| /* XXX - update curpage */ |
/* |
| |
* Update the timestamp on the page. A page must |
| |
* be idle for some period of time before it can |
| |
* be reclaimed by the pagedaemon. This minimizes |
| |
* ping-pong'ing for memory. |
| |
*/ |
| |
s = splclock(); |
| |
ph->ph_time = mono_time; |
| |
splx(s); |
| |
|
| |
/* |
| |
* Update the current page pointer. Just look for |
| |
* the first page with any free items. |
| |
* |
| |
* XXX: Maybe we want an option to look for the |
| |
* page with the fewest available items, to minimize |
| |
* fragmentation? |
| |
*/ |
| for (ph = TAILQ_FIRST(&pp->pr_pagelist); ph != NULL; |
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) |
|
|
| pp->pr_curpage = ph; |
pp->pr_curpage = ph; |
| } |
} |
| } |
} |
| |
/* |
| |
* If the page has just become un-empty, move it to the head of |
| |
* the list, and make it the current page. The next allocation |
| |
* will get the item from this page, instead of further fragmenting |
| |
* the pool. |
| |
*/ |
| |
else if (ph->ph_nmissing == (pp->pr_itemsperpage - 1)) { |
| |
TAILQ_REMOVE(&pp->pr_pagelist, ph, ph_pagelist); |
| |
TAILQ_INSERT_HEAD(&pp->pr_pagelist, ph, ph_pagelist); |
| |
pp->pr_curpage = ph; |
| |
} |
| |
|
| |
simple_unlock(&pp->pr_slock); |
| |
|
| simple_unlock(&pp->pr_lock); |
|
| } |
} |
| |
|
| /* |
/* |
| Line 818 pool_prime(pp, n, storage) |
|
| Line 874 pool_prime(pp, n, storage) |
|
| /* !storage && static caught below */ |
/* !storage && static caught below */ |
| #endif |
#endif |
| |
|
| (void)lockmgr(&pp->pr_resourcelock, LK_EXCLUSIVE, NULL); |
simple_lock(&pp->pr_slock); |
| |
|
| 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; |
| |
|
| while (newpages-- > 0) { |
while (newpages-- > 0) { |
| |
|
| 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); |
| } |
} |
| |
|
| Line 847 pool_prime(pp, n, storage) |
|
| Line 905 pool_prime(pp, n, storage) |
|
| 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 */ |
| |
|
| (void)lockmgr(&pp->pr_resourcelock, LK_RELEASE, NULL); |
simple_unlock(&pp->pr_slock); |
| return (0); |
return (0); |
| } |
} |
| |
|
| /* |
/* |
| * 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) |
|
| Line 926 pool_prime_page(pp, storage) |
|
| unsigned int ioff = pp->pr_itemoffset; |
unsigned int ioff = pp->pr_itemoffset; |
| int n; |
int n; |
| |
|
| 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) |
|
| Line 941 pool_prime_page(pp, storage) |
|
| 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)); |
| |
|
| pp->pr_nidle++; |
pp->pr_nidle++; |
| |
|
| Line 925 pool_prime_page(pp, storage) |
|
| Line 983 pool_prime_page(pp, storage) |
|
| |
|
| 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; |
| |
|
| simple_unlock(&pp->pr_lock); |
|
| return (0); |
|
| } |
} |
| |
|
| /* |
/* |
| Line 935 pool_prime_page(pp, storage) |
|
| Line 990 pool_prime_page(pp, storage) |
|
| * 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) |
|
| Line 1003 pool_catchup(pp) |
|
| { |
{ |
| 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); |
| |
|
| /* Acquire the resource lock and release the interlock. */ |
|
| error = lockmgr(&pp->pr_resourcelock, |
|
| LK_EXCLUSIVE | LK_INTERLOCK | LK_NOWAIT, &pp->pr_lock); |
|
| if (error) |
|
| break; |
|
| |
|
| if (nitems >= pp->pr_minitems) { |
|
| simple_lock(&pp->pr_lock); |
|
| (void) lockmgr(&pp->pr_resourcelock, LK_RELEASE, |
|
| NULL); |
|
| break; |
|
| } |
|
| |
|
| /* Call the page back-end allocator for more memory. */ |
|
| 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) { |
| simple_lock(&pp->pr_lock); |
|
| (void) lockmgr(&pp->pr_resourcelock, LK_RELEASE, |
|
| NULL); |
|
| error = ENOMEM; |
error = ENOMEM; |
| break; |
break; |
| } |
} |
| |
|
| pool_prime_page(pp, cp); |
pool_prime_page(pp, cp); |
| |
|
| simple_lock(&pp->pr_lock); |
|
| (void) lockmgr(&pp->pr_resourcelock, LK_RELEASE, |
|
| NULL); |
|
| } |
} |
| |
|
| return (error); |
return (error); |
| Line 1008 pool_setlowat(pp, n) |
|
| Line 1043 pool_setlowat(pp, n) |
|
| { |
{ |
| int error; |
int error; |
| |
|
| (void)lockmgr(&pp->pr_resourcelock, LK_EXCLUSIVE, NULL); |
simple_lock(&pp->pr_slock); |
| |
|
| 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) |
|
| Line 1068 pool_sethiwat(pp, n) |
|
| int n; |
int n; |
| { |
{ |
| |
|
| (void)lockmgr(&pp->pr_resourcelock, LK_EXCLUSIVE, NULL); |
simple_lock(&pp->pr_slock); |
| |
|
| 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); |
| } |
} |
| |
|
| void |
void |
| Line 1050 pool_sethardlimit(pp, n, warnmess, ratec |
|
| Line 1085 pool_sethardlimit(pp, n, warnmess, ratec |
|
| int ratecap; |
int ratecap; |
| { |
{ |
| |
|
| simple_lock(&pp->pr_lock); |
simple_lock(&pp->pr_slock); |
| |
|
| 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 |
|
| Line 1094 pool_sethardlimit(pp, n, warnmess, ratec |
|
| 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) |
|
| Line 1140 pool_page_alloc_nointr(sz, flags, mtype) |
|
| { |
{ |
| 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) |
|
| Line 1159 pool_page_free_nointr(v, sz, mtype) |
|
| * 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; |
| |
|
| 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; |
| |
|
| |
s = splclock(); |
| |
curtime = mono_time; |
| |
splx(s); |
| |
|
| 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); |
| |
|
| Line 1152 pool_reclaim (pp) |
|
| Line 1188 pool_reclaim (pp) |
|
| 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) |
|
| Line 1239 pool_drain(arg) |
|
| 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); |
| |
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) |
|
| Line 1282 pool_chk(pp, label) |
|
| 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) |
|
| Line 1335 pool_chk(pp, label) |
|
| } |
} |
| } |
} |
| out: |
out: |
| simple_unlock(&pp->pr_lock); |
simple_unlock(&pp->pr_slock); |
| return (r); |
return (r); |
| } |
} |
| #endif /* POOL_DIAGNOSTIC || DEBUG */ |
#endif /* POOL_DIAGNOSTIC || DEBUG */ |