From owner-freebsd-current  Mon Nov 18 11: 6:50 2002
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Date: Mon, 18 Nov 2002 11:08:21 -0800
From: Kris Kennaway <kris@obsecurity.org>
To: current@FreeBSD.org, alfred@FreeBSD.org, tanimura@FreeBSD.org
Subject: Lock order reversals in sys_pipe.c and kern_sig.c
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I've just turned witness back on on the bento cluster, and got the
following lock order reversals a number of times overnight:

Nov 18 07:45:40 <user.crit> gohan11 kernel: 1st 0xc6887200 pipe mutex (pipe mutex) @ /local0/src-client/sys/kern/sys_pipe.c:465
Nov 18 07:45:40 <user.crit> gohan11 kernel: 2nd 0xc0447780 sigio lock (sigio lock) @ /local0/src-client/sys/kern/kern_sig.c:2225
Nov 18 10:28:47 <user.crit> gohan10 kernel: 1st 0xc4941580 pipe mutex (pipe mutex) @ /local0/src-client/sys/kern/sys_pipe.c:1038
[...]

Are these known problems?

Kris


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