Messages in this thread | | | From | KOSAKI Motohiro <> | Subject | Re: [PATCH 3/3] mm,vmscan: Reclaim order-0 and compact instead of lumpy reclaim when under light pressure | Date | Sun, 14 Nov 2010 15:02:03 +0900 (JST) |
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> On Thu, Nov 11, 2010 at 07:07:04PM +0000, Mel Gorman wrote: > > + if (COMPACTION_BUILD) > > + sc->lumpy_reclaim_mode = LUMPY_MODE_COMPACTION; > > + else > > + sc->lumpy_reclaim_mode = LUMPY_MODE_CONTIGRECLAIM; > > > > Gack, I posted the slightly wrong version. This version prevents lumpy > reclaim ever being used. The figures I posted were for a patch where > this condition looked like > > if (COMPACTION_BUILD && priority > DEF_PRIORITY - 2) > sc->lumpy_reclaim_mode = LUMPY_MODE_COMPACTION; > else > sc->lumpy_reclaim_mode = LUMPY_MODE_CONTIGRECLAIM;
Can you please tell us your opinition which is better 1) automatically turn lumby on by priority (this approach) 2) introduce GFP_LUMPY (andrea proposed). I'm not sure which is better, then I'd like to hear both pros/cons concern.
Thanks.
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