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authorMateusz Nosek <mateusznosek0@gmail.com>2020-10-13 16:56:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-13 18:38:34 -0700
commit62b35fe0eba21b09b015cdb43cddf51073e4b18c (patch)
treec6765b6baf6b695d34245bd47d0fd9df8642403f /mm/compaction.c
parent1860129421c37a152b3bed23d7bef8ae21545d67 (diff)
mm/compaction.c: micro-optimization remove unnecessary branch
The same code can work both for 'zone->compact_considered > defer_limit' and 'zone->compact_considered >= defer_limit'. In the latter there is one branch less which is more effective considering performance. Signed-off-by: Mateusz Nosek <mateusznosek0@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Mel Gorman <mgorman@suse.de> Cc: David Rientjes <rientjes@google.com> Link: https://lkml.kernel.org/r/20200913190448.28649-1-mateusznosek0@gmail.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/compaction.c')
-rw-r--r--mm/compaction.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index 176dcded298e..6c63844fc061 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -180,11 +180,10 @@ bool compaction_deferred(struct zone *zone, int order)
return false;
/* Avoid possible overflow */
- if (++zone->compact_considered > defer_limit)
+ if (++zone->compact_considered >= defer_limit) {
zone->compact_considered = defer_limit;
-
- if (zone->compact_considered >= defer_limit)
return false;
+ }
trace_mm_compaction_deferred(zone, order);