Date: Wed, 8 Dec 2004 12:41:15 +0100 From: Michael Nottebrock <michaelnottebrock@gmx.net> To: Robert Watson <rwatson@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: crashdumps not working Message-ID: <200412081241.19968.michaelnottebrock@gmx.net> In-Reply-To: <Pine.NEB.3.96L.1041208111915.98791C-100000@fledge.watson.org> References: <Pine.NEB.3.96L.1041208111915.98791C-100000@fledge.watson.org>
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On Wednesday, 8. December 2004 12:20, Robert Watson wrote:
> On Tue, 7 Dec 2004, Michael Nottebrock wrote:
> > I recently enabled SW_WATCHDOG in my kernel, but when watchdog triggers
> > a panic, no crashdump is taken although dumps are enabled. What could be
> > causing this?
>
> If you drop to the debugger by using the debug.kdb.enter sysctl, and do
> "call doadump", followed by a reset, does a dump get generated
> successfully?
I don't have kdb enabled in my kernel configuration at all...
> I.e., are they completely broken on your system, or is this=20
> somehow a property of the particular hang you're seeing.
See my other mail, a different (non-watchdog) panic didn't trigger a dump=20
either. I even had the panic message in dmesg:
kernel trap 12 with interrupts disabled
=46atal trap 12: page fault while in kernel mode
fault virtual address =3D 0x14c
fault code =3D supervisor write, page not present
instruction pointer =3D 0x8:0xc0521397
stack pointer =3D 0x10:0xe9794b84
frame pointer =3D 0x10:0xe9794b90
code segment =3D base 0x0, limit 0xfffff, type 0x1b
=3D DPL 0, pres 1, def32 1, gran 1
processor eflags =3D resume, IOPL =3D 0
current process =3D 1281 (beep-media-player)
trap number =3D 12
panic: page fault
Syncing disks, vnodes remaining...4 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0=
0=20
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0=
0=20
0
(I enabled kern.sync_on_panic only very recently for my experimenting with=
=20
watchdog, dumping didn't work without it either).
=2D-=20
,_, | Michael Nottebrock | lofi@freebsd.org
(/^ ^\) | FreeBSD - The Power to Serve | http://www.freebsd.org
\u/ | K Desktop Environment on FreeBSD | http://freebsd.kde.org
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