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 <vdavydov@parallels.com>
Acked-by: Zefan Li <lizefan@huawei.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.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>

diff --git a/mm/slub.c b/mm/slub.c
index fe4db9c172384d7057ddea8710c8121c656888ba..fe376fe1f4fe3ce5526997ef700da9eee5c714a5 100644 (file)
--- 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) {