Re: [PATCH 8/8] mm: vmscan: Do not writeback filesystem pages from kswapd
From: Johannes Weiner <hidden>
Date: 2011-08-03 11:37:39
Also in:
linux-mm, lkml
On Thu, Jul 21, 2011 at 05:28:50PM +0100, Mel Gorman wrote:
Assuming that flusher threads will always write back dirty pages promptly then it is always faster for reclaimers to wait for flushers. This patch prevents kswapd writing back any filesystem pages. Signed-off-by: Mel Gorman <mgorman@suse.de>
Relying on the flushers may mean that every dirty page in the system has to be written back before the pages from the zone of interest are clean. De-facto we have only one mechanism to stay on top of the dirty pages from a per-zone perspective, and that is single-page writeout from reclaim. While we all agree that this sucks, we can not remove it unless we have a replacement that makes zones reclaimable in a reasonable time frame (or keep them reclaimable in the first place, what per-zone dirty limits attempt to do). As such, please include Nacked-by: Johannes Weiner [off-list ref] _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs