Commit ec97097b authored by Vladimir Davydov's avatar Vladimir Davydov Committed by Linus Torvalds

mm: vmscan: call NUMA-unaware shrinkers irrespective of nodemask

If a shrinker is not NUMA-aware, shrink_slab() should call it exactly
once with nid=0, but currently it is not true: if node 0 is not set in
the nodemask or if it is not online, we will not call such shrinkers at
all.  As a result some slabs will be left untouched under some
circumstances.  Let us fix it.
Signed-off-by: default avatarVladimir Davydov <vdavydov@parallels.com>
Reported-by: default avatarDave Chinner <dchinner@redhat.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: Glauber Costa <glommer@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0b1fb40a
...@@ -369,16 +369,17 @@ unsigned long shrink_slab(struct shrink_control *shrinkctl, ...@@ -369,16 +369,17 @@ unsigned long shrink_slab(struct shrink_control *shrinkctl,
} }
list_for_each_entry(shrinker, &shrinker_list, list) { list_for_each_entry(shrinker, &shrinker_list, list) {
for_each_node_mask(shrinkctl->nid, shrinkctl->nodes_to_scan) { if (!(shrinker->flags & SHRINKER_NUMA_AWARE)) {
if (!node_online(shrinkctl->nid)) shrinkctl->nid = 0;
continue;
if (!(shrinker->flags & SHRINKER_NUMA_AWARE) &&
(shrinkctl->nid != 0))
break;
freed += shrink_slab_node(shrinkctl, shrinker, freed += shrink_slab_node(shrinkctl, shrinker,
nr_pages_scanned, lru_pages); nr_pages_scanned, lru_pages);
continue;
}
for_each_node_mask(shrinkctl->nid, shrinkctl->nodes_to_scan) {
if (node_online(shrinkctl->nid))
freed += shrink_slab_node(shrinkctl, shrinker,
nr_pages_scanned, lru_pages);
} }
} }
......
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