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mm/compaction.c: __compact_pgdat() code cleanuup

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This patch uses is_via_compact_memory() to distinguish compaction from
sysfs or sysctl.  And, this patch also reduces indentation on
compaction_defer_reset() by filtering these cases first before checking
watermark.

There is no functional change.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joonsoo Kim 2016-01-14 15:20:48 -08:00 committed by Linus Torvalds
parent a8ae499170
commit 7546934570
1 changed files with 7 additions and 6 deletions
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11
mm/compaction.c
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@ -1658,15 +1658,16 @@ static void __compact_pgdat(pg_data_t *pgdat, struct compact_control *cc)
!compaction_deferred(zone, cc->order))
compact_zone(zone, cc);
if (cc->order > 0) {
VM_BUG_ON(!list_empty(&cc->freepages));
VM_BUG_ON(!list_empty(&cc->migratepages));
if (is_via_compact_memory(cc->order))
continue;
if (zone_watermark_ok(zone, cc->order,
low_wmark_pages(zone), 0, 0))
compaction_defer_reset(zone, cc->order, false);
}
VM_BUG_ON(!list_empty(&cc->freepages));
VM_BUG_ON(!list_empty(&cc->migratepages));
}
}
void compact_pgdat(pg_data_t *pgdat, int order)