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Subject[PATCH 2/4] mm, compaction: Check if a page has been captured before draining PCP pages
Date
If a page has been captured then draining is unnecssary so check first
for a captured page.

Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
---
mm/compaction.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index c018b0e65720..28711a21a8a2 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -2441,6 +2441,12 @@ compact_zone(struct compact_control *cc, struct capture_control *capc)
}
}

+ /* Stop if a page has been captured */
+ if (capc && capc->page) {
+ ret = COMPACT_SUCCESS;
+ break;
+ }
+
check_drain:
/*
* Has the migration scanner moved away from the previous
@@ -2459,12 +2465,6 @@ compact_zone(struct compact_control *cc, struct capture_control *capc)
last_migrated_pfn = 0;
}
}
-
- /* Stop if a page has been captured */
- if (capc && capc->page) {
- ret = COMPACT_SUCCESS;
- break;
- }
}

out:
--
2.35.3
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