>
> Hi Florian,
>
> Full ACK to
Brad,
>
> kick the 2.6.27-Kernel. We have some kernel-gurus in
here and
> they will tell you the same. Try 2.6.26 or 2.6.28 and
it
> should work....
>
> Best regards,
>
>
Thomas
>
>
> Am Freitag, den 06.03.2009, 11:09 +1100
schrieb Brad Plant:
> > Hi Florian,
> >
> > I was
unable to successfully migrate VMs running a 2.6.27
> kernel. I found
that the network would stop working on the
> first migration and then
the disk IO would stop when
> migrating the machine back again (which
made processes block
> waiting for disk IO and therefore the machine
appear to hang).
> >
> > Try a 2.6.28 kernel. It seems to
have sorted out my issues.
> >
> > Cheers,
>
>
> > Brad
> >
> >
> > On Thu, 5 Mar
2009 14:12:56 +0100
> > "Rustedt, Florian" <
Florian.Rustedt@xxxxxxxxxxx> wrote:
>
>
> > > Hello list,
> > >
> > > I've
got strange phenomenons with migrations. I think it's a bug,
> >
> but am not sure, so i am asking for your help to find this ou,
>
> > please ;)
> > >
> > > First the
construct:
> > > Two HP DL180G5(xen0,xen1) with dual-quadcore
each, 8G RAM.
> > >
> > > On each a dom0 with
selfcompiled(because of network
> drivers)
gentoo-sources-xen-2.6.27_amd64 and Xen 3.3.0. The
> installation is
completely the same (rsynct), only different
> in ip and
hostname.
> > >
> > > Both share a drbd0(v8.3.0)
device. On it an lvm with one
> lv per vm.
> > >
>
> > Now what's the problem:
> > >
> > > If i
migrate a running vm(mx1-smartnet-de) from xen0 to
> xen1, it seems to
work.
> > > I could do a "xm migrate mx1-smartnet-de xen1"
without
> any interuption while having a ssh-connection to the vm
and
> downloading a kernel-source in it.
> > >
>
> > Then i did a "xm migrate mx1-smartnet-de xen0" on xen1 to
>
move it back again. After that, the vm freezes at 100%CPU and
> that's
it! Can't connect to it any more, whether via ssh nor
> via vnc/fb or
console. Only "xm destroy" could help, "xm
> shutdown" has no
impact.
> > >
> > > For debugging, i added the
concerning parts of the
> xend.log from each and the kernel-configs,
so that you could
> try to help me find the prob perhaps in the
logs?
> > >
> > > Just after having started the
vm:
> > > xen0_after_start_of_vm.log
> > >
>
> > Then after the first migration:
> > >
xen0_after_migrate_to_xen1_of_vm.log
> > >
xen1_after_migrate_to_xen1_of_vm.log
> > >
> > > And
last, after the reverse:
> > >
xen0_after_migrate_back_from_xen1_of_vm.log
> > >
xen1_after_migrate_back_from_xen1_of_vm.log
> > >
> >
> I don't believe it is a drbd/lvm problem, because drbd
> keeps in
"0: cs:Connected ro:Primary/Primary
> ds:UpToDate/UpToDate C r---" and
there are no lv-concerning
> log-entries in syslog.
> >
>
> > > There are of course errors concerning "retry
suspend
> domain failed", but there's no hint, WHY this has got
failed?
> > >
> > > Kind regards, Florian
>
> >
>
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