Messages in this thread Patch in this message | | | Date | Thu, 15 Aug 2013 18:02:53 +0800 | Subject | kswapd skips compaction if reclaim order drops to zero? | From | Hillf Danton <> |
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If the allocation order is not high, direct compaction does nothing. Can we skip compaction here if order drops to zero?
--- a/mm/vmscan.c Thu Aug 15 17:47:26 2013 +++ b/mm/vmscan.c Thu Aug 15 17:48:58 2013 @@ -3034,7 +3034,7 @@ static unsigned long balance_pgdat(pg_da * Compact if necessary and kswapd is reclaiming at least the * high watermark number of pages as requsted */ - if (pgdat_needs_compaction && sc.nr_reclaimed > nr_attempted) + if (pgdat_needs_compaction && sc.nr_reclaimed > nr_attempted && order) compact_pgdat(pgdat, order);
/* --
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