Commit 99120b77 authored Apr 03, 2014 by Vladimir Davydov Committed by Linus Torvalds Apr 03, 2014

mm: vmscan: respect NUMA policy mask when shrinking slab on direct reclaim



When direct reclaim is executed by a process bound to a set of NUMA
nodes, we should scan only those nodes when possible, but currently we
will scan kmem from all online nodes even if the kmem shrinker is NUMA
aware.  That said, binding a process to a particular NUMA node won't
prevent it from shrinking inode/dentry caches from other nodes, which is
not good.  Fix this.

Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Glauber Costa <glommer@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 62572e29

mm/vmscan.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -2425,8 +2425,8 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
		unsigned long lru_pages = 0;

		nodes_clear(shrink->nodes_to_scan);
		for_each_zone_zonelist(zone, z, zonelist,
		gfp_zone(sc->gfp_mask)) {
		for_each_zone_zonelist_nodemask(zone, z, zonelist,
		gfp_zone(sc->gfp_mask), sc->nodemask) {
		if (!cpuset_zone_allowed_hardwall(zone, GFP_KERNEL))
		continue;

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