linux-kernel - Re: [PATCH 1/4] vmscan: simplify shrink_inactive

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Message-ID: <20100416071333.GX18855@one.firstfloor.org>
Date:	Fri, 16 Apr 2010 09:13:33 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Dave Chinner <david@...morbit.com>
Cc:	Andi Kleen <andi@...stfloor.org>, Mel Gorman <mel@....ul.ie>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Chris Mason <chris.mason@...cle.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 1/4] vmscan: simplify shrink_inactive_list()

On Fri, Apr 16, 2010 at 09:40:13AM +1000, Dave Chinner wrote:
> On Thu, Apr 15, 2010 at 06:54:16PM +0200, Andi Kleen wrote:
> > > It's a buying-time venture, I'll agree but as both approaches are only
> > > about reducing stack stack they wouldn't be long-term solutions by your
> > > criteria. What do you suggest?
> > 
> > (from easy to more complicated):
> > 
> > - Disable direct reclaim with 4K stacks
> 
> Just to re-iterate: we're blowing the stack with direct reclaim on
> x86_64  w/ 8k stacks.  The old i386/4k stack problem is a red
> herring.

Yes that's known, but on 4K it will definitely not work at all.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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