Messages in this thread | | | Date | Wed, 11 Apr 2012 13:26:13 -0400 | From | Rik van Riel <> | Subject | Re: [PATCH 2/3] mm: vmscan: Do not stall on writeback during memory compaction |
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On 04/11/2012 12:38 PM, Mel Gorman wrote: > This patch stops reclaim/compaction entering sync reclaim as this was only > intended for lumpy reclaim and an oversight. Page migration has its own > logic for stalling on writeback pages if necessary and memory compaction > is already using it. > > Waiting on page writeback is bad for a number of reasons but the primary > one is that waiting on writeback to a slow device like USB can take a > considerable length of time. Page reclaim instead uses wait_iff_congested() > to throttle if too many dirty pages are being scanned. > > Signed-off-by: Mel Gorman<mgorman@suse.de>
Acked-by: Rik van Riel <riel@redhat.com>
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