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sl[au]b: allocate objects from memcg cache

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We are able to match a cache allocation to a particular memcg.  If the
task doesn't change groups during the allocation itself - a rare event,
this will give us a good picture about who is the first group to touch a
cache page.

This patch uses the now available infrastructure by calling
memcg_kmem_get_cache() before all the cache allocations.

Signed-off-by: Glauber Costa <glommer@parallels.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Frederic Weisbecker <fweisbec@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: JoonSoo Kim <js1304@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Glauber Costa
2012-12-18 14:22:48 -08:00
committed by Linus Torvalds
parent b9ce5ef49f
commit d79923fad9
4 changed files with 16 additions and 5 deletions
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5
include/linux/slub_def.h
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@@ -225,7 +225,10 @@ void *__kmalloc(size_t size, gfp_t flags);
static __always_inline void *
kmalloc_order(size_t size, gfp_t flags, unsigned int order)
{
void *ret = (void *) __get_free_pages(flags | __GFP_COMP, order);
void *ret;
flags |= (__GFP_COMP | __GFP_KMEMCG);
ret = (void *) __get_free_pages(flags, order);
kmemleak_alloc(ret, size, 1, flags);
return ret;
}