[PATCH] slub: do not put a slab to cpu partial list when cpu_partial is 0

From: Joonsoo Kim
Date: Wed Jun 19 2013 - 02:33:45 EST

In free path, we don't check number of cpu_partial, so one slab can
be linked in cpu partial list even if cpu_partial is 0. To prevent this,
we should check number of cpu_partial in put_cpu_partial().

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>

diff --git a/mm/slub.c b/mm/slub.c
index 57707f0..7033b4f 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1955,6 +1955,9 @@ static void put_cpu_partial(struct kmem_cache *s, struct page *page, int drain)
int pages;
int pobjects;

+ if (!s->cpu_partial)
+ return;
do {
pages = 0;
pobjects = 0;

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