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Date:      Wed, 04 Dec 2002 15:17:24 -0800
From:      Lars Eggert <larse@ISI.EDU>
To:        Alfred Perlstein <alfred@FreeBSD.org>
Cc:        Kris Kennaway <kris@obsecurity.org>, current@FreeBSD.org, tanimura@FreeBSD.org
Subject:   Re: Lock order reversals in sys_pipe.c and kern_sig.c
Message-ID:  <3DEE8D04.5040708@isi.edu>
In-Reply-To: <20021118190819.GK12906@rot13.obsecurity.org>
References:  <20021118190819.GK12906@rot13.obsecurity.org> <20021118193901.GA16066@elvis.mu.org> <3DEE8996.70602@isi.edu> <20021204231245.GH58155@elvis.mu.org>
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[-- Attachment #1 --]
Alfred Perlstein wrote:

> * Lars Eggert  [021204 15:04] wrote:
>
> >FYI, just got a similar one yesterday on an up-to-date -current:
> >
> >lock order reversal
> > 1st 0xc784d700 pipe mutex (pipe mutex) @ 
> /usr/src/sys/kern/sys_pipe.c:465
> > 2nd 0xc0513840 sigio lock (sigio lock) @ 
> /usr/src/sys/kern/kern_sig.c:2225
>
> Since no one has given me the traceback based on the patch I posted
> earlier I have ceased to care about the "problem".  If someone
> seriously cares they will run with my patch and post a backtrace.

Applied your patch, will send a traceback when it happens again (I only 
get one of these every few days).

Lars
-- 
Lars Eggert <larse@isi.edu>           USC Information Sciences Institute

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