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| author | Benjamin LaHaise <bcrl@kvack.org> | 2005-06-23 00:10:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-23 09:45:29 -0700 |
| commit | 01890a4c120f68366441bf5e193d1b9dd543d4d0 (patch) | |
| tree | ed854da46009b0837485e8acd17dc9d944e8068f /mm/mempool.c | |
| parent | 8476994af7bd9352ecdf61ba760f7397f54e30a1 (diff) | |
| download | lwn-01890a4c120f68366441bf5e193d1b9dd543d4d0.tar.gz lwn-01890a4c120f68366441bf5e193d1b9dd543d4d0.zip | |
[PATCH] mempool - only init waitqueue in slow path
Here's a small patch to improve the performance of mempool_alloc by only
initializing the wait queue when we're about to wait.
Signed-off-by: Benjamin LaHaise <benjamin.c.lahaise@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/mempool.c')
| -rw-r--r-- | mm/mempool.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/mempool.c b/mm/mempool.c index 920c8c3ab1b8..9a72f7d918fa 100644 --- a/mm/mempool.c +++ b/mm/mempool.c @@ -204,7 +204,7 @@ void * mempool_alloc(mempool_t *pool, unsigned int __nocast gfp_mask) { void *element; unsigned long flags; - DEFINE_WAIT(wait); + wait_queue_t wait; int gfp_temp; might_sleep_if(gfp_mask & __GFP_WAIT); @@ -235,6 +235,7 @@ repeat_alloc: /* Now start performing page reclaim */ gfp_temp = gfp_mask; + init_wait(&wait); prepare_to_wait(&pool->wait, &wait, TASK_UNINTERRUPTIBLE); smp_mb(); if (!pool->curr_nr) |