Messages in this thread Patch in this message | | | From | Joonsoo Kim <> | Subject | [PATCH] mm, slab_common: add 'unlikely' to size check of kmalloc_slab() | Date | Fri, 2 Aug 2013 11:02:42 +0900 |
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Size is usually below than KMALLOC_MAX_SIZE. If we add a 'unlikely' macro, compiler can make better code.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
diff --git a/mm/slab_common.c b/mm/slab_common.c index 538bade..f0410eb 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -373,7 +373,7 @@ struct kmem_cache *kmalloc_slab(size_t size, gfp_t flags) { int index; - if (size > KMALLOC_MAX_SIZE) { + if (unlikely(size > KMALLOC_MAX_SIZE)) { WARN_ON_ONCE(!(flags & __GFP_NOWARN)); return NULL; } -- 1.7.9.5
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