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Date: Sun, 24 Jun 2007 17:35:11 +0200
From: Udo van den Heuvel <udovdh@xs4all.nl>
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To: linux-kernel@vger.kernel.org
CC: Folkert van Heusden <folkert@vanheusden.com>
Subject: Re: 2.6.21.4: possible circular locking dependency detected
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Udo van den Heuvel wrote:
> Udo van den Heuvel wrote:
> 
>> While copying a small file over to a windows box via cifs, once again I
>> got something like this:
> 
> Again with 2.6.21.5:
> 
> =======================================================
> [ INFO: possible circular locking dependency detected ]
> 2.6.21.5 #10
> -------------------------------------------------------
(cut)

There is a bugzilla entry with some more info.
http://bugzilla.kernel.org/show_bug.cgi?id=8377

It looks like the bug has been there for a while. When will it go?
Networking (at least) is not reliable in my situation.