Re: [RFC PATCH 0/8] Reduce filesystem writeback from page reclaim v2

Minchan Kim
2011-07-29T09:50:16Z

Sorry for missing Ccing.

On Fri, Jul 29, 2011 at 06:48:16PM +0900, Minchan Kim wrote:
> On Thu, Jul 28, 2011 at 12:38:52PM +0100, Mel Gorman wrote:
> > On Thu, Jul 28, 2011 at 01:18:21AM +0900, Minchan Kim wrote:
> > > On Thu, Jul 21, 2011 at 05:28:42PM +0100, Mel Gorman wrote:
> > > > Note how preventing kswapd reclaiming dirty pages pushes up its CPU
>
> <snip>
>
> > > > usage as it scans more pages but it does not get excessive due to
> > > > the throttling.
> > >
> > > Good to hear.
> > > The concern of this patchset was early OOM kill with too many scanning.
> > > I can throw such concern out from now on.
> > >
> >
> > At least, I haven't been able to trigger a premature OOM.
>
> AFAIR, Andrew had a premature OOM problem[1] but I couldn't track down at that time.
> I think this patch series might solve his problem. Although it doesn't, it should not accelerate
> his problem, at least.
>
> Andrew, Could you test this patchset?
>
> [1] https://lkml.org/lkml/2011/5/25/415
> --
> Kind regards,
> Minchan Kim

--
Kind regards,
Minchan Kim