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authorChristoph Lameter <clameter@sgi.com>2008-02-14 23:21:32 +0100
committerChristoph Lameter <christoph@stapp.engr.sgi.com>2008-02-15 00:30:01 +0100
commitb7a49f0d4c34166ae84089d9f145cfaae1b0eec5 (patch)
tree716bd20c8b920511f032a42be78c0a523a17565d /mm/slub.c
parentmake slub.c:slab_address() static (diff)
downloadlinux-b7a49f0d4c34166ae84089d9f145cfaae1b0eec5.tar.xz
linux-b7a49f0d4c34166ae84089d9f145cfaae1b0eec5.zip
slub: Determine gfpflags once and not every time a slab is allocated
Currently we determine the gfp flags to pass to the page allocator each time a slab is being allocated. Determine the bits to be set at the time the slab is created. Store in a new allocflags field and add the flags in allocate_slab(). Acked-by: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Christoph Lameter <clameter@sgi.com>
Diffstat (limited to 'mm/slub.c')
-rw-r--r--mm/slub.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 1af7f2f19420..ccfd41141b6b 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1078,14 +1078,7 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
struct page *page;
int pages = 1 << s->order;
- if (s->order)
- flags |= __GFP_COMP;
-
- if (s->flags & SLAB_CACHE_DMA)
- flags |= SLUB_DMA;
-
- if (s->flags & SLAB_RECLAIM_ACCOUNT)
- flags |= __GFP_RECLAIMABLE;
+ flags |= s->allocflags;
if (node == -1)
page = alloc_pages(flags, s->order);
@@ -2333,6 +2326,16 @@ static int calculate_sizes(struct kmem_cache *s)
if (s->order < 0)
return 0;
+ s->allocflags = 0;
+ if (s->order)
+ s->allocflags |= __GFP_COMP;
+
+ if (s->flags & SLAB_CACHE_DMA)
+ s->allocflags |= SLUB_DMA;
+
+ if (s->flags & SLAB_RECLAIM_ACCOUNT)
+ s->allocflags |= __GFP_RECLAIMABLE;
+
/*
* Determine the number of objects per slab
*/