linux-ext4 - Re: [Bug 14354] Re: ext4 increased intolerance to unclean shutdown?

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Message-ID: <4AEAF013.60300@redhat.com>
Date:	Fri, 30 Oct 2009 08:54:27 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Theodore Tso <tytso@....edu>, Eric Sandeen <sandeen@...hat.com>,
	Parag Warudkar <parag.lkml@...il.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>, linux-ext4@...r.kernel.org,
	bugzilla-daemon@...zilla.kernel.org
Subject: Re: [Bug 14354] Re: ext4 increased intolerance to unclean shutdown?

Theodore Tso wrote:
> On Thu, Oct 29, 2009 at 04:38:57PM -0500, Eric Sandeen wrote:
>> I've been running my testcase, and I just hit the usual corruption with  
>> this patch in place after 8 iterations, I'm afraid.
> 
> Eric, since you have a relatively controllable reproduction case, have
> you tried reproducing Alexey's bisection results?  Specifically he
> seemed to find that commit fe188c0e shows no problem, and commit
> 91ac6f43 is the first commit with problems?

I can try it but I have very little faith in that result to be honest.

> Having to do multiple iterations will make doing a bisection a major
> pain, but maybe we'll get something out of that.

Well I've been doing bisects but I'm getting skeptical of the results; 
either my testcase isn't reliable enough or all the merges are confusing 
git-bisect (?)  Anyway it keeps ending up on nonsensical commits.

> Other things that might be worth doing given that you have a test case
> would be to try reverting commit 91ac6f43, and see if that helps, and
> to try this patch: http://bugzilla.kernel.org/attachment.cgi?id=23468
> 
> Or have you tried some of these experiments already?
> 
> Regards,
> 
> 						- Ted

After talking to Aneesh last night, I think other good spot-checks will 
be to revert 487caeef9fc08c0565e082c40a8aaf58dad92bbb, and to test Jan's 
sync patches.

-Eric
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