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Re: Failure of xfstest 229

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: Failure of xfstest 229
From: Chandra Seetharaman <sekharan@xxxxxxxxxx>
Date: Fri, 20 May 2011 12:01:37 -0700
Cc: XFS Mailing List <xfs@xxxxxxxxxxx>
In-reply-to: <20110520171304.GA20208@xxxxxxxxxxxxx>
Organization: IBM
References: <1305852937.7661.369.camel@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> <20110520025840.GP32466@dastard> <1305909303.7661.373.camel@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> <20110520171304.GA20208@xxxxxxxxxxxxx>
Reply-to: sekharan@xxxxxxxxxx
It is strange then.

It is the same system, and it failed few hours after it succeeded in
2.6.39.

Basically, I saw seeing the failure with 2TB fs. I thought I will try it
with a 20GB fs, and the very first time it succeeded, but after that it
never did even with the same kernel (2.6.39).

On Fri, 2011-05-20 at 13:13 -0400, Christoph Hellwig wrote:
> On Fri, May 20, 2011 at 09:35:03AM -0700, Chandra Seetharaman wrote:
> > 
> > Can it run successfully by fluke sometimes ? I did have a successful run
> > on the 20G filesystem yesterday once, but not able to reproduce it again
> 
> It doesn't fail on thinly provisioned storage which zeroes out any
> blocks it gives to the OS.  Similarly it might not fail if all blocks
> that it would normally leak are zeroed underneath for some reason,
> but it's rather unlikely that this happens by accident.
> 
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