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Date: Wed, 21 Mar 2007 21:16:35 +0300
From: Oleg Nesterov <oleg@tv-sign.ru>
To: Jarek Poplawski <jarkao2@o2.pl>
Cc: Neil Brown <neilb@suse.de>, Andrew Morton <akpm@linux-foundation.org>,
       Peter Zijlstra <a.p.zijlstra@chello.nl>,
       Folkert van Heusden <folkert@vanheusden.com>,
       linux-kernel@vger.kernel.org, "J. Bruce Fields" <bfields@fieldses.org>,
       Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH] Re: [2.6.20] BUG: workqueue leaked lock
Message-ID: <20070321181635.GA570@tv-sign.ru>
References: <17918.11420.155569.991473@notabene.brown> <20070320093753.GA1751@ff.dom.local> <20070320160759.GA107@tv-sign.ru> <20070321080510.GA1939@ff.dom.local> <20070321144620.GC78@tv-sign.ru> <20070321151651.GA4547@ff.dom.local> <20070321152935.GA215@tv-sign.ru>
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On 03/21, Oleg Nesterov wrote:
>
> On 03/21, Jarek Poplawski wrote:
> >
> > So, if
> > you have another idea for looking after it, let us know.
>
> No, I don't.

Perhaps we can add lockdep_depth() checks to laundromat_main/nfs4_laundromat
to rule out workqueue.c. According to the trace, we return with client_mutex
held, this seems impossible. So we can also print the value of mutex_is_locked()
if lockdep_depth() != 0.

Oleg.