From dee2f8aaabccb64a67166bd8ab27d95cfbdc7704 Mon Sep 17 00:00:00 2001 From: Vladimir Davydov Date: Fri, 12 Dec 2014 16:58:28 -0800 Subject: [PATCH] slub: fix cpuset check in get_any_partial If we fail to allocate from the current node's stock, we look for free objects on other nodes before calling the page allocator (see get_any_partial). While checking other nodes we respect cpuset constraints by calling cpuset_zone_allowed. We enforce hardwall check. As a result, we will fallback to the page allocator even if there are some pages cached on other nodes, but the current cpuset doesn't have them set. However, the page allocator uses softwall check for kernel allocations, so it may allocate from one of the other nodes in this case. Therefore we should use softwall cpuset check in get_any_partial to conform with the cpuset check in the page allocator. Signed-off-by: Vladimir Davydov Acked-by: Zefan Li Acked-by: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Cc: Tejun Heo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/slub.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index fe4db9c17238..fe376fe1f4fe 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1670,8 +1670,7 @@ static void *get_any_partial(struct kmem_cache *s, gfp_t flags, n = get_node(s, zone_to_nid(zone)); - if (n && cpuset_zone_allowed(zone, - flags | __GFP_HARDWALL) && + if (n && cpuset_zone_allowed(zone, flags) && n->nr_partial > s->min_partial) { object = get_partial_node(s, n, c, flags); if (object) {