Commit 62f75532 authored Apr 14, 2008 by Pekka Enberg

slub: Initialize per-cpu stats



As spotted by kmemcheck, we need to initialize the per-CPU ->stat array before
using it.

[kmem_cache_cpu structures are usually allocated from arrays defined via
DEFINE_PER_CPU that are zeroed so we have not noticed this so far --cl].

Reported-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

parent 120dd64c

mm/slub.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1886,6 +1886,9 @@ static void init_kmem_cache_cpu(struct kmem_cache *s,
		c->node = 0;
		c->offset = s->offset / sizeof(void *);
		c->objsize = s->objsize;
		#ifdef CONFIG_SLUB_STATS
		memset(c->stat, 0, NR_SLUB_STAT_ITEMS * sizeof(unsigned));
		#endif
		}

		static void init_kmem_cache_node(struct kmem_cache_node *n)