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mm: compaction: avoid fragmentation score calculation for empty zones

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There is no need to calculate the fragmentation score for empty zones.

Link: https://lkml.kernel.org/r/100331ad9d274a9725e687b00d85d75d7e4a17c7.1673342761.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Baolin Wang 2023-01-10 21:36:22 +08:00 committed by Andrew Morton
parent 8fff8b6f8d
commit 9e5522715e
1 changed files with 2 additions and 0 deletions
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mm/compaction.c
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@ -2025,6 +2025,8 @@ static unsigned int fragmentation_score_node(pg_data_t *pgdat)
struct zone *zone;
zone = &pgdat->node_zones[zoneid];
if (!populated_zone(zone))
continue;
score += fragmentation_score_zone_weighted(zone);
}