Hi,

I recently upgraded my Etch dom0 to a Lenny dom0. Since this time, one
of my virtual machines crashes from time to time. This VM has 8 VCPUS.

The VM is configured with on_crash="destroy" and so I've never seen her
hang because the Hypervisor destroys the machine immediately. After 3
incidents of this type (the Etch dom0 had been running for more than one
year without any issue) in 2 weeks (the VM crashed yesterday and today),
we have restarted the Xend with the dump-core option on and I have
started playing with the generated core (by crashing another VM with a
module triggering a Kernel panic).

I have rebuilt a "linux-image-2.6.26-2-xen package with
CONFIG_DEBUG_INFO." (thanks Valentin for the hint) but I'm not sure the
image has xen built-into it (I apt-get sourced the
linux-image-2.6.26-2-xen-686 package, but I think that building the Xen
kernel out of it requires some special options other than a ):


crash /boot/System.map-2.6.26-2-xen-686 vmlinux
2009-1029-1350.15-kek.24.core

crash 4.0-6.3
Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Red Hat, Inc.
Copyright (C) 2004, 2005, 2006 IBM Corporation
Copyright (C) 1999-2006 Hewlett-Packard Co
Copyright (C) 2005, 2006 Fujitsu Limited
Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.
Copyright (C) 2005 NEC Corporation
Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
This program is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it under
certain conditions. Enter "help copying" to see the conditions.
This program has absolutely no warranty. Enter "help warranty" for details.

GNU gdb 6.1
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu"...

crash: cannot determine vcpu_guest_context.ctrlreg offset
[1] 1962 exit 1 crash /boot/System.map-2.6.26-2-xen-686 vmlinux
2009-1029-1350.15-kek.24.core


The multiple VCPUs VM hasn't crashed since this morning, but next time
it happens, I'll gladly provide any information to somebody wishing to
look into the issue.


--
Pierre Baillet.
In the Kamigata area they have a sort of tiered lunchbox they use for
a single day when flower viewing. Upon returning, they throw them away,
trampling them underfoot. The end is important in all things.
Ghost Dog - The Way of the Samouraï




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On Thu, 2009-10-29 at 15:48 +0100, Pierre Baillet wrote:
> Hi,
>
> I recently upgraded my Etch dom0 to a Lenny dom0. Since this time, one
> of my virtual machines crashes from time to time. This VM has 8 VCPUS.
[...]

I think you may be running into #542250, not this bug. Please try
installing the version of linux-image-2.6.26-2-xen-686 in
stable-proposed-updates, which fixes that bug. You'll need to add this
line to /etc/apt/sources.list:

deb http://ftp.debian.org/debian/ stable-proposed-updates main

Ben.

--
Ben Hutchings
I'm always amazed by the number of people who take up solipsism because
they heard someone else explain it. - E*Borg on alt.fan.pratchett

Hello,

Ben Hutchings a écrit :
> I think you may be running into #542250, not this bug. Please try
> installing the version of linux-image-2.6.26-2-xen-686 in
> stable-proposed-updates, which fixes that bug. You'll need to add this
> line to /etc/apt/sources.list:
>
> deb http://ftp.debian.org/debian/ stable-proposed-updates main
>
> Ben.
>
It might have done the trick. Thank you for the hint ! And good luck
with this bug !

Pierre.
--
Pierre Baillet. Even if one's head were to be suddenly cut off, he
should be able to do one more action with certainty. With martial valor,
if one becomes like a revengeful ghost and shows great determination,
though his head is cut off, he should not die. Ghost Dog - The Way of
the Samouraï



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Hi,

I also have this bug with 2.6.26-2-xen-amd64 kernel. (from proposal-updates)
I noticed that the domUs locked when i'm using vcpu>1 option.

If you take a visit to here:
http://kepfeltoltes.hu/view/091125/xen1.padmin-memory-day_www.kepfeltoltes.hu_.png

You can see, that the domU apps filling memory. The situation is the
same, as others

write it before. I can't use the domU, can't shutdown, just can destroy it.

I hope i helped with memory graph.

Peter





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