linux-kernel - Re: stuck nfsd processes with 2.6.24-rc2

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Message-ID: <20071113204512.GC7450@Krystal>
Date:	Tue, 13 Nov 2007 15:45:13 -0500
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To:	Christian Kujau <lists@...dbynature.de>
Cc:	linux-kernel@...r.kernel.org, bfields@...ldses.org
Subject: Re: stuck nfsd processes with 2.6.24-rc2

* Christian Kujau (lists@...dbynature.de) wrote:
> Hi there,
>
> I noticed that I cannot use kernel nfsd any more with 2.6.24-rc2, last 
> working kernel as of now is 2.6.23.1. First I was using nfsv4 but switching 
> to nfsv3 did not help either: exported shares can be mounted (client: 
> 2.6-git/powerpc32, nfs-common-1.1.1~git-20070709-3ubuntu1), but running "ls 
> /mountpoint" (even without "-l") on the client is enough to get the [nfsd] 
> processes in "D" state.
> Restarting the rpc.nfsd process on the does not help much, the new rpc.nfsd 
> processes get stuck quickly.
>
> For more details please see http://nerdbynature.de/bits/2.6.24-rc2/nfsd/
>
> I haven't seen this particular issue on the list recently, hence my post.
> I'll try to git-bisect my way through the changesets, but it'll take some 
> time...
>

Hrm, sounds like an interesting case for LTTng. Feel free to try it
and get the text dump of the last events that led to the nfsd hang.

See http://ltt.polymtl.ca for the patchset for 2.6.24-rc3-git3,
just follow the quickstart guide to get started.

(the overall process could be faster than a git bisect....)

Mathieu


> Thanks,
> Christian.
> -- 
> BOFH excuse #314:
>
> You need to upgrade your VESA local bus to a MasterCard local bus.
> -
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-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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