linux-kernel - Re: NFS oops in 2.6.26rc4

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Message-Id: <E1135064-06EA-405C-A967-DFB1DC9F0418@oracle.com>
Date:	Wed, 4 Jun 2008 14:13:08 -0400
From:	Chuck Lever <chuck.lever@...cle.com>
To:	Dave Jones <davej@...hat.com>
Cc:	Trond Myklebust <Trond.Myklebust@...app.com>, chucklever@...il.com,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: NFS oops in 2.6.26rc4


On Jun 4, 2008, at 10:19 AM, Dave Jones wrote:

> On Fri, May 30, 2008 at 03:37:01PM -0400, Chuck Lever wrote:
>
>>> Something else of note which I hadn't seen before, usually things  
>>> lock
>>> up just after that first oops. For some reason, today it survived
>>> a little longer, but things really went downhill fast.
>>> It survived a 'dmesg ; scp dmesg davej@...k', and then wedged solid.
>>> So as well as the oops, it seems we're corrupting memory too.
>>> For reference, this kernel has both SLUB_DEBUG and PAGEALLOC_DEBUG
>>> enabled.
>>
>> I haven't seen this kind of problem here with .26, but yes, it does
>> look like something is clobbering memory during an NFS mount.
>>
>> I introduced some NFS mount parsing changes in this commit range:
>>
>>   2d767432..82d101d5
>>
>> A quick bisect should show which, if any of these, is the guilty
>> party.  If any of these are the problem, I suspect it's 3f8400d1.
>
> I didn't get time to try this out yet (hopefully tomorrow).
> In the meantime, we've just gotten word of another user seeing memory
> corruption with nfs - https://bugzilla.redhat.com/show_bug.cgi?id=449958

449958 could very well be the same problem.  The stack traceback is a  
lot cleaner than the one you originally sent, but there are a lot of  
similarities.  (I doubt this is related to symlinks, as the comment  
suggests).

Is commit 86d61d863 applied to the current rawhide kernel?

--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com
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