Date: Wed, 23 Feb 2005 17:34:47 -0800 From: Kris Kennaway <kris@obsecurity.org> To: Kris Kennaway <kris@obsecurity.org> Cc: jhb@FreeBSD.org Subject: Re: panic: Assertion td->td_sleepqueue != NULL failed at /usr/src/sys/kern/subr_sleepqueue.c:258 Message-ID: <20050224013447.GA51370@xor.obsecurity.org> In-Reply-To: <20050223235515.GA19260@xor.obsecurity.org> References: <20050223235405.GB19137@xor.obsecurity.org> <20050223235515.GA19260@xor.obsecurity.org>
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--17pEHd4RhPHOinZp Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Feb 23, 2005 at 03:55:15PM -0800, Kris Kennaway wrote: > On Wed, Feb 23, 2005 at 03:54:05PM -0800, Kris Kennaway wrote: > > I got this on a 12-processor e4500 running RELENG_5: > >=20 > > panic: Assertion td->td_sleepqueue !=3D NULL failed at /usr/src/sys/ker= n/subr_sleepqueue.c:258 > > cpuid =3D 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=3D0x10a7b0 -- >=20 > 1 fffff80138505ab8 0 0 1 0004200 [SLPQ proctree 0xc03de0c8= ][CPU 0] init >=20 > > About the only nonstandard thing I did was set > > kern.sched.ipiwakeup.onecpu=3D1 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? No preemption. I did get a core, and I'll add KTR_PROC per discussion of this same panic when Peter Holm reported it in December. Kris --17pEHd4RhPHOinZp Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQFCHS83Wry0BWjoQKURAiL3AKDDMNXmYEpOgT1HeAqPVwFErmi+6gCgqyEH UB95UCrB4GOYEluohC0tlbE= =guOb -----END PGP SIGNATURE----- --17pEHd4RhPHOinZp--
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