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| author | Vladimir Davydov <vdavydov@parallels.com> | 2014-01-23 15:53:23 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-23 16:36:52 -0800 |
| commit | ec97097bca147d5718a5d2c024d1ec740b10096d (patch) | |
| tree | 0398f0eb71bf85f8eaaa6712abe6c57589a8c6f7 /mm | |
| parent | 0b1fb40a3b1291f2f12f13f644ac95cf756a00e6 (diff) | |
| download | linux-stable-ec97097bca147d5718a5d2c024d1ec740b10096d.tar.gz linux-stable-ec97097bca147d5718a5d2c024d1ec740b10096d.tar.bz2 linux-stable-ec97097bca147d5718a5d2c024d1ec740b10096d.zip | |
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: Vladimir Davydov <vdavydov@parallels.com>
Reported-by: Dave 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/vmscan.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 45c1cf61cbed..90c4075d8d75 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -369,16 +369,17 @@ unsigned long shrink_slab(struct shrink_control *shrinkctl, } list_for_each_entry(shrinker, &shrinker_list, list) { - for_each_node_mask(shrinkctl->nid, shrinkctl->nodes_to_scan) { - if (!node_online(shrinkctl->nid)) - continue; - - if (!(shrinker->flags & SHRINKER_NUMA_AWARE) && - (shrinkctl->nid != 0)) - break; - + if (!(shrinker->flags & SHRINKER_NUMA_AWARE)) { + shrinkctl->nid = 0; 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); } } |