Date: Mon, 23 Apr 2007 21:42:21 +0200 From: Ivan Voras <ivoras@fer.hr> To: freebsd-current@freebsd.org Subject: Re: Panic on boot. How do I get a kernel dump. Message-ID: <f0j274$1bu$1@sea.gmane.org> In-Reply-To: <de193d070704231144o40426f86j263e2309e2f9490f@mail.gmail.com> References: <de193d070704231144o40426f86j263e2309e2f9490f@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enig00C41AA4119EB0BB845D6315
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Tom Cumming wrote:
> All of the doc's I can find are for getting a kernel dump after it's bo=
oted
> (i.e., set the dumpdev using dumpon, etc.). I have a panic during boot =
and
> it says it won't dump b/c there's no dump device. I cannot find any doc=
's
> anywhere that mention how to set the dump device before you boot (i.e.,=
> from
> the loader, patch the kernel, whatever...). Does anyone know how to get=
an
> early dump?
Can you boot from a Live CD ("Fixit CD", CD1 in the set), and either
configure it from there, or build a kernel with debugging installed so
it presents you the debugger when it panics?
If you have a "snapshot" CD of 7-current, its kernel is already
configured with KDB, so if it panics, you can get a backtrace and
transcribe it.
--------------enig00C41AA4119EB0BB845D6315
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
iD8DBQFGLQwildnAQVacBcgRAudmAJwLqgmXCtBCDsWYD+kOjqjZ2u6s5wCbBsb0
Am/k8L4YJvKOd44BqTKxXtw=
=uffG
-----END PGP SIGNATURE-----
--------------enig00C41AA4119EB0BB845D6315--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?f0j274$1bu$1>