From: Helge Bahmann <hcb@chaoticmind.net>
Subject: Re: NFSv3 server: lockd hangs
Date: Thu, 19 Oct 2006 09:56:33 +0200 (CEST)
Message-ID: <Pine.LNX.4.44.0610190943400.12867-100000@lothlorien.local>
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Trond Myklebust wrote:
> There is a known deadlock in lockd for stock 2.6.17. See the fix at
>
>   http://client.linux-nfs.org/Linux-2.6.x/2.6.18-rc4/linux-2.6.18-011-fix_nlm_traverse_files_deadlock.dif
>
>
> This patch will be included in the next stable release for 2.6.17.

Okay thanks; upgraded to 2.6.18 which apparently contains the fix (and
hopefully no regressions)

Is there also a known problem with NFSv3 file locking and sec=krb5 mounts?
Sometimes a process on the NFS client hangs trying to lock a file which is
definitely *not* locked on any other client -- strange thing is, it
happens only if the same process does more than one lock/unlock cycle, and
it only happens after multiple ticket expiries. However if it has happened
once, it becomes quite reproducable. Rebooting the client fixes the
problem. Rebooting the server does as well.

Is there something I could do to diagnose the problem once the problem
starts appearing?

Thanks again and best regards
-- 
Helge Bahmann <hcb@chaoticmind.net>                     /| \__
The past: Smart users in front of dumb terminals       /_|____\
                                                     _/\ |   __)
Wer im finally-Block sitzt, sollte nicht             \\ \|__/__|
mit exceptions werfen.                                \\/___/ |
                                                        |


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