[Pkg-libvirt-maintainers] Bug#586217: Bug#586217: live migration corrupts virtio block device on NFSv4

[Guido Günther]

On Fri, Jun 18, 2010 at 02:02:44PM +0200, Harald Dunkel wrote:
> On 06/17/10 16:30, Guido Günther wrote:
> >This is all kvm/qemu's business AFAIK. Could you attach the qemu log? Did
> >you try --live?
> >
> 
> --live is already in; see the bug report. /tmp/qemu.log is not
Then lets turn this around: what happens without it?

> written. Is there an option for libvirtd to turn on logging?
It's not in /tmp see:

http://wiki.debian.org/libvirt#Bugreports.2BAC8-Debugging
  
> >Could you also try to reproduce this with kvm/qemu (without libvirt) and
> >see if the problem persists?
> >
> 
> Migration on the command line never worked for me. I can use
> kvm to start the guest, e.g.
> 
> /usr/bin/kvm \
>         -enable-kvm -m 1024 -name migtest \
>         -nodefaults \
>         -boot c \
>         -drive file=/storage/migtest/vda.img,if=none,id=drive-virtio-disk0,boot=on \
>         -vga cirrus
> 
> but if I press ctrl-alt-2 as documented on http://www.linux-kvm.org/page/HOWTO
> to switch to the monitor, then nothing happens.
Drop the -nodefaults  - then it should work.

> Actually I am using libvirt to avoid this kind of problems.
True but to track this down we need to find out if it's kvm of libvirt
(I suspect the former).

Cheers,
 -- Guido