linux-ext4 - Re: ext4: (2.6.34-rc4): This should not happen!! Data will be lost

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Message-ID: <20100420174610.GZ21495@skl-net.de>
Date:	Tue, 20 Apr 2010 19:46:10 +0200
From:	Andre Noll <maan@...temlinux.org>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	Bernd Schubert <bernd.schubert@...tmail.fm>,
	Andrew Vasquez <andrew.vasquez@...gic.com>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	Linux Driver <Linux-Driver@...gic.com>,
	Thomas Helle <Helle@...bingen.mpg.de>
Subject: Re: ext4: (2.6.34-rc4): This should not happen!!  Data will be lost

On 11:51, Eric Sandeen wrote:
> On 04/20/2010 10:37 AM, Andre Noll wrote:
> ...
> 
> > - device timeout 30s, nobarrier
> > 	No problem at all, all three runs OK.
> > 
> > Eric, are you still interested in seeing the blktrace output? Suppose,
> > I should use a 30s timeout, nodealloc and barriers=1 as this triggers
> > the problem within minutes.
> 
> Hm, so something about barriers being issued is causing timeout
> problems on the device...?

Yes, that's what it looks like.

> To be honest I'm not sure what I would do with the blktrace data now,
> but perhaps someone might be interested to see it; I'd at least gather it.

OK, will send it tomorrow.

Thanks
Andre
-- 
The only person who always got his work done by Friday was Robinson Crusoe

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