Date: 12 Mar 2001 23:16:45 +0100 From: Dag-Erling Smorgrav <des@ofug.org> To: Mikhail Teterin <mi@mail.virtual-estates.net> Cc: current@freebsd.org Subject: Re: panic trying to play Civillization (with trace, etc.) Message-ID: <xzpy9uavdiq.fsf@flood.ping.uio.no> In-Reply-To: Mikhail Teterin's message of "Mon, 12 Mar 2001 00:26:41 -0500 (EST)" References: <200103120526.AAA09072@mail.virtual-estates.net>
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Mikhail Teterin <mi@mail.virtual-estates.net> writes:
> > If you can, please reproduce the panic on a kernel compiled with the
> > INVARIANTS, INVARIANT_SUPPORT and WITNESS options.
> Well, with this options on, the machine does not crash, but the
> program segfaults on startup:
The trace you're showing looks like it's from a shell script that
starts civctp. I need to see the trace from the civctp binary itself.
> lock order reversal
> 1st lockmgr interlock last acquired @ ../../kern/kern_lock.c:239
> 2nd 0xcefa0520 process lock @ ../../kern/kern_sig.c:183
> 3rd 0xc1029f80 lockmgr interlock @ ../../kern/kern_lock.c:560
Haven't seen this one before... If it's reproducible, could you do the
following:
1) recompile your kernel with WITNESS_DDB
2) hook up a serial console and boot with '-h' in /boot.config
3) provoke the reversal, then get the output from 'trace', 'show
mutex' and 'show witness' at the DDB prompt
4) type 'continue' to exit DDB and continue running normally.
> lock order reversal
> 1st vnode interlock last acquired @ ../../kern/vfs_vnops.c:625
> 2nd 0xc0419680 mntvnode @ ../../ufs/ffs/ffs_vfsops.c:939
> 3rd 0xcefb986c vnode interlock @ ../../ufs/ffs/ffs_vfsops.c:948
This is a known (and probably benign) bug.
DES
--
Dag-Erling Smorgrav - des@ofug.org
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