Re: [PATCH 2/4] vmscan: drop PF_SWAPWRITE from zone_reclaim

From: Rik van Riel
Date: Wed May 13 2009 - 09:37:33 EST


KOSAKI Motohiro wrote:
Subject: [PATCH] vmscan: drop PF_SWAPWRITE from zone_reclaim

PF_SWAPWRITE mean ignore write congestion. (see may_write_to_queue())

foreground reclaim shouldn't ignore it because to write congested device cause
large IO lantency.
it isn't better than remote node allocation.

It might be on NUMAQ (which is no longer manufactured), but
your change looks right for every other vaguely modern NUMA
architecture that I know of.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>

Acked-by: Rik van Riel <riel@xxxxxxxxxx>

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