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Subject[PATCH 3/6] change alloc function in alloc_slab_page
Date
alloc_slab_page never calls alloc_pages_node with -1.
It means node's validity check is unnecessary.
So we can use alloc_pages_exact_node instead of alloc_pages_node.
It could avoid comparison and branch as 6484eb3e2a81807722 tried.

Cc: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
---
mm/slub.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index b364844..9984165 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1084,7 +1084,7 @@ static inline struct page *alloc_slab_page(gfp_t flags, int node,
if (node == -1)
return alloc_pages(flags, order);
else
- return alloc_pages_node(node, flags, order);
+ return alloc_pages_exact_node(node, flags, order);
}

static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
--
1.7.0.5


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