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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>
This commit is contained in:
Mateusz Nosek 2020-10-13 16:56:58 -07:00 committed by Linus Torvalds
parent 1860129421
commit 62b35fe0eb
1 changed files with 2 additions and 3 deletions
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mm/compaction.c
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@ -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);