mm: vmscan: do not clear SHRINKER_NUMA_AWARE if nr_node_ids == 1
authorVladimir Davydov <vdavydov@virtuozzo.com>
Tue, 15 Mar 2016 21:56:55 +0000 (14:56 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 15 Mar 2016 23:55:16 +0000 (16:55 -0700)
commitcecf257b62e39eab0e802e91c62ae5679673db02
treea044f724c023f9c56834f95e58163a8cf14b54e0
parent703fc13a3f6615e29ce3eb862275d7b58a5d03ba
mm: vmscan: do not clear SHRINKER_NUMA_AWARE if nr_node_ids == 1

Currently, on shrinker registration we clear SHRINKER_NUMA_AWARE if
there's the only NUMA node present.  The comment states that this will
allow us to save some small loop time later.  It used to be true when
this code was added (see commit 1d3d4437eae1b ("vmscan: per-node
deferred work")), but since commit 6b4f7799c6a57 ("mm: vmscan: invoke
slab shrinkers from shrink_zone()") it doesn't make any difference.
Anyway, running on non-NUMA machine shouldn't make a shrinker NUMA
unaware, so zap this hunk.

Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/vmscan.c