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Re: disk performance strange/low

To: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>
Subject: Re: disk performance strange/low
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Mon, 17 Aug 2009 22:43:50 -0400
Cc: xfs@xxxxxxxxxxx
In-reply-to: <200908180408.10738@xxxxxx>
References: <200908172311.07660@xxxxxx> <20090817214136.GA26060@xxxxxxxxxxxxx> <200908180408.10738@xxxxxx>
User-agent: Mutt/1.5.19 (2009-01-05)
On Tue, Aug 18, 2009 at 04:08:05AM +0200, Michael Monnerie wrote:
> On Montag 17 August 2009 Christoph Hellwig wrote:
> > Yes, that sounds like the problem of the VM not feeding us enough
> > pages to write. ?What kernel is this on? ?Latest 2.6.31-rc has a
> > workaround for it.
> 
> 2.6.27.23-0.1-xen from openSUSE 11.1
> I can't switch as I use it with the free Xen. Thanks for the info.

Try backporting commit c8a4051c3731b6db224482218cfd535ab9393ff8 from
mainline - it should apply just fine to a 2.6.27-ish kernel.

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