From: Vladimir Davydov Date: Tue, 15 Mar 2016 21:56:55 +0000 (-0700) Subject: mm: vmscan: do not clear SHRINKER_NUMA_AWARE if nr_node_ids == 1 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cecf257b62e39eab0e802e91c62ae5679673db02;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 Acked-by: Johannes Weiner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/vmscan.c b/mm/vmscan.c index 71b1c29948db..db5722a07d4f 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -228,14 +228,6 @@ int register_shrinker(struct shrinker *shrinker) { size_t size = sizeof(*shrinker->nr_deferred); - /* - * If we only have one possible node in the system anyway, save - * ourselves the trouble and disable NUMA aware behavior. This way we - * will save memory and some small loop time later. - */ - if (nr_node_ids == 1) - shrinker->flags &= ~SHRINKER_NUMA_AWARE; - if (shrinker->flags & SHRINKER_NUMA_AWARE) size *= nr_node_ids;