Date: Thu, 08 May 2003 12:53:39 -0400 (EDT) From: John Baldwin <jhb@FreeBSD.org> To: "Robin P. Blanchard" <Robin.Blanchard@gactr.uga.edu> Cc: current@freebsd.org Subject: RE: Fxp / polling / witness panic Message-ID: <XFMail.20030508125339.jhb@FreeBSD.org> In-Reply-To: <EE3D3FBAFFCAED448C21C398FDAD91AC01080C@EBE1.gc.nat>
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On 08-May-2003 Robin P. Blanchard wrote:
> Latest sources with following debugging options set yields the panic below.
>
> makeoptions DEBUG=-g
> options KTRACE
> options DDB
> options DDB_UNATTENDED
> options ALT_BREAK_TO_DEBUGGER
> options INVARIANTS
> options INVARIANT_SUPPORT
> options WITNESS
> options WITNESS_SKIPSPIN
>
>#0 doadump () at /usr/src/sys/kern/kern_shutdown.c:238
> 238 dumping++;
> (kgdb) bt
>#0 doadump () at /usr/src/sys/kern/kern_shutdown.c:238
>#1 0xc01d8133 in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:370
>#2 0xc01d847b in panic () at /usr/src/sys/kern/kern_shutdown.c:543
>#3 0xc01fb681 in witness_lock (lock=0xc1526160, flags=8,
> file=0xc0308197 "/usr/src/sys/dev/fxp/if_fxp.c", line=1465)
> at /usr/src/sys/kern/subr_witness.c:722
What is the actual panic?
Is it this one?
KASSERT((lock1->li_lock->lo_flags & LO_WITNESS) == 0,
("lock missing witness structure"));
Looks like the lock may be used after it was destroyed or some such.
--
John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
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