Skip site navigation (1)Skip section navigation (2)
Date:      Tue, 29 May 2007 23:35:49 +0200
From:      Stefan Sperling <stsp@stsp.name>
To:        freebsd-hackers@freebsd.org
Subject:   Re: Freebsd 6.2 panic
Message-ID:  <20070529213548.GA20565@ted.stsp.lan>
In-Reply-To: <31ED92D6-BE85-4BE6-A27D-F7A59E9C3656@aida.org>
References:  <31ED92D6-BE85-4BE6-A27D-F7A59E9C3656@aida.org>

next in thread | previous in thread | raw e-mail | index | archive | help

--AhhlLboLdkugWU4S
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Tue, May 29, 2007 at 10:56:40PM +0200, didier derny wrote:
>  I  have some machines running php/mysql/postfix
>  from time to time the computers running FreeBSD 6,2
>  crashes with the following messages
>=20
>  fatal trap 12:page fault while in kernel mode
>  cpuid=3D0; apic id=3D00
>  fault virtual address =3D 0x104
>  fault code =3D supervisor read, page not present
>  instruction pointer=3D 0x20:0xc066c731
>  stack pointer=3D0x28:0xe74fec90
>  frame pointer=3D0x28:0xe74fec9c
>  code segment=3Dbase 0x0,limit 0xfffff,type 0x1b
>                       =3D DPL 0, pres 1, def32 1, gran 1
>  processor eflag=3Dresume,IOPL=3D0

Is it always the exact same panic or is it random?

A box here had a few random "trap 12 page fault" panics recently,
especially while booting up cold but also at run time, and the
problem turned out to be bad capacitors on the motherboard.

If you have physical access look at the capacitors on the board
to see if they are bulged of even leak.

>  cannot dump. no dump device defined

You might want to configure dumping, see dumpon(8).
Look at the traces you get from the dumps:

	kgdb /boot/kernel/kernel <dumpfile>
	bt

It helps to run a kernel compiled with DEBUG=3D-g.
I think this is default in GENERIC on 6.2.

If the crashes are at seemingly random points in the kernel
code you probably have a hardware problem. If it's always the
same trace then post it.

--=20
stefan
http://stsp.name                                         PGP Key: 0xF59D25F0

--AhhlLboLdkugWU4S
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (FreeBSD)

iD8DBQFGXJy05dMCc/WdJfARAgLeAKC2VMWzzoAIOCyTPTn+pDrSTerobACffUA+
3XF4weUZrpsCKc89glv+xJ4=
=Q2Nt
-----END PGP SIGNATURE-----

--AhhlLboLdkugWU4S--



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070529213548.GA20565>