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slub: Move node determination out of hotpath

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If the node does not change then there is no need to recalculate
the node from the page struct. So move the node determination
into the places where we acquire a new slab page.

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Christoph Lameter 2011-04-15 14:48:15 -05:00 • committed by Pekka Enberg
parent 01ad8a7bc2
commit dc1fb7f436
1 changed files with 5 additions and 4 deletions

9
mm/slub.c
View file

@ -1828,7 +1828,6 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
c->freelist = get_freepointer(s, object);
page->inuse = page->objects;
page->freelist = NULL;
c->node = page_to_nid(page);
unlock_out:
slab_unlock(page);
@ -1845,8 +1844,10 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
new_slab:
page = get_partial(s, gfpflags, node);
if (page) {
c->page = page;
stat(s, ALLOC_FROM_PARTIAL);
load_from_page:
c->node = page_to_nid(page);
c->page = page;
goto load_freelist;
}
@ -1867,8 +1868,8 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
slab_lock(page);
__SetPageSlubFrozen(page);
c->page = page;
goto load_freelist;
goto load_from_page;
}
if (!(gfpflags & __GFP_NOWARN) && printk_ratelimit())
slab_out_of_memory(s, gfpflags, node);