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Re: Kernel 2.6.30.4 loop(..?) regression (& with/2.6.31-rc6)

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: Kernel 2.6.30.4 loop(..?) regression (& with/2.6.31-rc6)
From: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
Date: Wed, 2 Sep 2009 07:45:36 -0400 (EDT)
Cc: Nikanth Karthikesan <knikanth@xxxxxxx>, Jens Axboe <jens.axboe@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx
In-reply-to: <alpine.DEB.2.00.0908280720220.30806@xxxxxxxxxxxxxxxx>
References: <alpine.DEB.2.00.0908221044420.30321@xxxxxxxxxxxxxxxx> <20090822201558.GA17955@xxxxxxxxxxxxx> <alpine.DEB.2.00.0908221645440.20848@xxxxxxxxxxxxxxxx> <20090822205502.GA18904@xxxxxxxxxxxxx> <alpine.DEB.2.00.0908221659030.23463@xxxxxxxxxxxxxxxx> <20090823224504.GA19942@xxxxxxxxxxxxx> <alpine.DEB.2.00.0908240704130.9427@xxxxxxxxxxxxxxxx> <alpine.DEB.2.00.0908260949550.9396@xxxxxxxxxxxxxxxx> <20090826180234.GC14019@xxxxxxxxxxxxx> <alpine.DEB.2.00.0908261717001.1594@xxxxxxxxxxxxxxxx> <20090826212732.GA18124@xxxxxxxxxxxxx> <alpine.DEB.2.00.0908261728580.1594@xxxxxxxxxxxxxxxx> <alpine.DEB.2.00.0908280720220.30806@xxxxxxxxxxxxxxxx>
User-agent: Alpine 2.00 (DEB 1167 2008-08-23)


On Fri, 28 Aug 2009, Justin Piszcz wrote:

On Wed, 26 Aug 2009, Justin Piszcz wrote:

On Wed, 26 Aug 2009, Christoph Hellwig wrote:

On Wed, Aug 26, 2009 at 05:19:11PM -0400, Justin Piszcz wrote:

Christoph,

Now 6 days without any problems using -o nobarrier.

$ uptime
 07:43:55 up 6 days, 14:12,  1 user,  load average: 0.00, 0.00, 0.00

So -o nobarrier is a workaround for the issue.  How / what debug settings
should be enabled to catch the bug/problem when -o nobarrier is used?

Justin.

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