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Re: [Xen-users] domU shell prompt freezes after live migration

To: Benjamin Weaver <benjamin.weaver@xxxxxxxxxxxxx>
Subject: Re: [Xen-users] domU shell prompt freezes after live migration
From: David Della Vecchia <ddv@xxxxxxxxxxxxxxxx>
Date: Tue, 25 Oct 2011 10:47:25 -0400
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Yep, 2.6.32-5-xen-amd64 is the one i personally confirm fails at live in this regard.

I run xen4.1.1 in debian wheezy and the 2.6.39.4 kernel i got from kernel.org works flawlessly with the debian squeeze domU's

-DDV

On Tue, Oct 25, 2011 at 10:37 AM, Benjamin Weaver <benjamin.weaver@xxxxxxxxxxxxx> wrote:
Thanks, David,

This could be very useful. We are running Debian Squeeze for the dom0 (kernel: 2.6.32-5-xen-amd64), but Ubuntu (lucid) for the domUs.

Ben


On 25/10/11 15:19, David Della Vecchia wrote:
Are you on debian by chance? I had the exact same issue, it has to do with the kernel you are using for the domU.

Here is the bug report describing it: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=644604

I've had this occur with other kernel's i've built, not just debian provided ones. I was able to build a 2.6.39.4 and a 3.0.1 kernel last night that restored my ability to do xm save and restore without the console lock up.

Hope this helps.

-David

On Tue, Oct 25, 2011 at 9:46 AM, Benjamin Weaver <benjamin.weaver@xxxxxxxxxxxxx> wrote:
I have narrowed down and further defined the problem using xm commands:

1. the problem does not have to do with migration from one node to another per se:

an xm save and subsequent xm restore done from either box, without migration, reproduces the problem. In each case a vm is produced that I can ping and login to, but which produces the frozen prompt.

I have also tried the following:

2. opened permissions on .img files under /ocfs2SAN/domains
to no avail,
therefore not a permissions problem

3. opened up sysctl buffers on both boxes
to no avail
not a sys buffers problem




Might I perhaps have a file system or cluster configuration problem?

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