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

Christoph Lameter
2009-05-14T19:57:45Z

On Wed, 13 May 2009, 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.

Zone reclaim by default does not perform writes. RECLAIM_WRITE must be set
for that to be effective.

Acked-by: Christoph Lameter <cl@linux-foundation.org>