9:50 a.m.
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Hi,
Just to give a small update.
It seems that when installing the willy-lts-kernel backport package on =
14.04, the VMs stopped getting stuck.
We have now been running 6 weeks without a single VM crashing.
Before, we had 1-2 per day.
Maybe it will be useful to somebody.
Kind regards,
=E2=80=94
Christophe =20
On 30 Mar 2016, at 14:23, Christophe TREFOIS =
<christophe.trefois(a)uni.lu> wrote:
=20
Hi Kevin,
=20
Ok thanks for the feedback.
=20
Do you have experience with kernel panics and more specifically how to =
get any
meaningful message if this is happening?
=20
According to syslog on the guest, at least after reboot, there's no =
information that something went wrong.
=20
Since this seems to leave the qemu world, I'm now not sure where to =
ask for
support in this :(
=20
Kind regards,
=20
--
Christophe=20
Sent from my iPhone
=20
> On 30 Mar 2016, at 14:14, Kevin Wolf <kwolf(a)redhat.com> wrote:
>=20
> Hi Christophe,
>=20
> Am 30.03.2016 um 13:45 hat Christophe TREFOIS geschrieben:
>> Another host went down, so I have to prepare info for this one.
>>=20
>> I could not SSH to it anymore.
>> Console would show login screen, but no keystrokes were registered.
>>=20
>> I could =E2=80=9Csuspend=E2=80=9D the VM and =E2=80=9Crun=E2=80=9D =
it,
but still can=E2=80=99t SSH to it.
>> Before suspension, all QEMU threads were around 0%, after
resuming, =
3 of them hover at 100%.
>>=20
>> Attached you could find the gdb, core dump, and other logs.
>>=20
>> Logs: https://dl.dropboxusercontent.com/u/63261/ubuntu2-logs.tar.gz
>>=20
>> Core Dump: =
https://dl.dropboxusercontent.com/u/63261/core-ubuntu2.tar.gz
>>=20
>> Is there anything else we could provide?
>=20
> This sounds much like it's not qemu that hangs (because then stopping
> and resuming wouldn't work any more), but just the guest OS that is
> running inside the VM.
>=20
> We've had cases before where qemu was reported to hang with 100% CPU
> usage and in the end it turned out that the guest kernel had =
panicked.
> Can you check whether a guest kernel crash could be the cause? If
=
this
> is reproducible, maybe the easiest way would be to attach a
serial
> console to the VM and let the kernel print its messages there.
>=20
> Kevin
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