Date: Fri, 16 Apr 2010 09:13:33 +0200
From: Andi Kleen <andi@firstfloor.org>
To: Dave Chinner <david@fromorbit.com>
Cc: Andi Kleen <andi@firstfloor.org>, Mel Gorman <mel@csn.ul.ie>,
       KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
       Chris Mason <chris.mason@oracle.com>, linux-kernel@vger.kernel.org,
       linux-mm@kvack.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 1/4] vmscan: simplify shrink_inactive_list()
Message-ID: <20100416071333.GX18855@one.firstfloor.org>
References: <20100415085420.GT2493@dastard> <20100415185310.D1A1.A69D9226@jp.fujitsu.com> <20100415192140.D1A4.A69D9226@jp.fujitsu.com> <20100415131532.GD10966@csn.ul.ie> <87tyrc92un.fsf@basil.nowhere.org> <20100415154442.GG10966@csn.ul.ie> <20100415165416.GV18855@one.firstfloor.org> <20100415234013.GX2493@dastard>
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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@linux.intel.com -- Speaking for myself only.
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