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xen-devel
[Xen-devel] Re: Test results for save/restore with upstream pv_ops domU
On Thu, 2010-01-28 at 21:25 +0000, Pasi Kärkkäinen wrote:
> Hello,
>
> I just tried some save/restore tests with Fedora 12 Linux 2.6.31.12 kernels.
> The exact Fedora kernel versions are: 2.6.31.12-174.2.3.fc12.i686.PAE and
> 2.6.31.12-174.2.3.fc12.x86_64.
>
> Dom0 for these tests was CentOS 5.4 (Xen 3.1.2).
>
> - F12 32bit 1vcpu PV guest:
> save+restore OK, BUG() in guest dmesg after restore [1]
>
> - F12 64bit 1vcpu PV guest:
> save+restore OK, BUG() in guest dmesg after restore [2]
I think those are the same underlying bug and are fixed by
http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=commit;h=777df2b017ef34b2d1a172bf769582158839a860
>
> - F12 32bit 2vcpu PV guest:
> save doesn't work, guest stays as "migrating-f12test32" in "xm list"
> forever and has to be "xm destroy"ed.
>
> - F12 64bit 2vcpu PV guest:
> save doesn't work, guest stays as "migrating-f12test64" in "xm list"
> forever and has to be "xm destroy"ed.
>
>
> What's the best way to debug failing "xm save" ? There was no errors in "xm
> log", or in "xm dmesg".
I think you might see some stuff in /var/log/xen/something but I don't
have any particular tips apart from "add printf/printk".
> Also the guest "xm console" doesn't show anything before it dies.
>
> Is it possible some of the save/restore related patches didn't make it to
> 2.6.31.x stable kernels?
AFAIK they only went into the 2.6.32 stable branch. Unfortunately I
think the 2.6.31 stable series has come to an end now.
Ian.
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