From owner-freebsd-stable@FreeBSD.ORG  Wed Feb 23 23:54:07 2005
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 7322916A4CE; Wed, 23 Feb 2005 23:54:07 +0000 (GMT)
Received: from obsecurity.dyndns.org
	(CPE0050040655c8-CM00111ae02aac.cpe.net.cable.rogers.com [69.199.47.57])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 33F4143D2F; Wed, 23 Feb 2005 23:54:07 +0000 (GMT)
	(envelope-from kris@obsecurity.org)
Received: by obsecurity.dyndns.org (Postfix, from userid 1000)
	id CE51951240; Wed, 23 Feb 2005 15:54:05 -0800 (PST)
Date: Wed, 23 Feb 2005 15:54:05 -0800
From: Kris Kennaway <kris@obsecurity.org>
To: stable@FreeBSD.org
Message-ID: <20050223235405.GB19137@xor.obsecurity.org>
Mime-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha1;
	protocol="application/pgp-signature"; boundary="Bn2rw/3z4jIqBvZU"
Content-Disposition: inline
User-Agent: Mutt/1.4.2.1i
cc: julian@FreeBSD.org
cc: jhb@FreeBSD.org
Subject: panic: Assertion td->td_sleepqueue != NULL failed at
	/usr/src/sys/kern/subr_sleepqueue.c:258
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Production branch of FreeBSD source code
	<freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 23 Feb 2005 23:54:07 -0000


--Bn2rw/3z4jIqBvZU
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

I got this on a 12-processor e4500 running RELENG_5:

panic: Assertion td->td_sleepqueue != NULL failed at /usr/src/sys/kern/subr_sleepqueue.c:258
cpuid = 0
KDB: enter: panic
[thread pid 1 tid 100003 ]
Stopped at      kdb_enter+0x38: ta              %xcc, 1
db> wh
Tracing pid 1 tid 100003 td 0xfffff801385067b0
panic() at panic+0x19c
sleepq_add() at sleepq_add+0x168
cv_wait() at cv_wait+0x174
_sx_xlock() at _sx_xlock+0x64
kern_wait() at kern_wait+0x3c
wait4() at wait4+0x18
syscall() at syscall+0x220
-- syscall (7, FreeBSD ELF64, wait4) %o7=0x10a7b0 --

About the only nonstandard thing I did was set
kern.sched.ipiwakeup.onecpu=1 which was suggested for working around
other deadlocks.  I don't recall if preemption is enabled for this
machine (I didn't set it up).  Is there any other online debugging I
can do?

Kris


--Bn2rw/3z4jIqBvZU
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.0 (FreeBSD)

iD8DBQFCHRedWry0BWjoQKURAkfIAKCIK79iUFd8jdVHNqW9msHiHt9YogCeKmPF
7kBI4LIFtAn7/BTb/MBUKXQ=
=zjbY
-----END PGP SIGNATURE-----

--Bn2rw/3z4jIqBvZU--