Re: [Xen-users] DOM U get restarted during xen live migration

[reza azimi <reza.c.azimi@xxxxxxxxx>]

Thanks Ian, I will try to do that, unfortunately I couldnt find time today to doing that.

Meanwhile I found this page:

https://wiki.debian.org/Xen#dom0_automatic_reboots

which recommend to add the below to the grub when DOM 0 get restarted:

GRUB_CMDLINE_XEN="noreboot"

I've done that and the result is the xeon machine doesnt get restarted but instead it freeze and I have to power it off and on.

when there is nothing running on the guests the restarting issue doesnt happen but when I run something and then try to migrate the guest it happens.

I though to share it maybe it helps to find what is the problem.

Regards

Reza

On Wed, Nov 20, 2013 at 12:44 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:

On Wed, 2013-11-20 at 12:40 -0500, reza azimi wrote:
> Let me first fix one thing, the title should be fixed to "DOM 0 get
> restarted during live migration", The xeon machine get restarted
> during the migration both when it receiving a guest or sending a
> guest.

Please can you collect a console log. Preferable via a serial console
http://wiki.xen.org/wiki/Xen_Serial_Console

> Second thanks Ian for the reply, sorry I'm very new to xen what do you
> mean by "Did you reduce the cpuid exposed to the guest to the lowest
> common
> denominator here", in my config file I've putted vcpus = 2, xeon
> machine has 8 cores and intel machine has 4 cores so I thought 2 out
> of 8 or 4 can not cause a problem. should mention something like this
> to explicitly mention which cpus to use? for ex: cpus = ["2", "3"]
>  Is there any log file that I can see the time pre copy and stop and
> copy start/finish. Maybe I can find some relation there?

I didn't mean the numbers of CPUs but rather the CPU features, i.e. the
CPUID (presence of SSE, SSE2 all that sort of thing, which differs
across different families of processor etc).

However if this is crashing the host then this is not really relevant
any more

> Also I've heard there are some settings for migration like the memory
> threshold value that remain before starting the "stop and copy" and
> number of iteration that it try in "pre copy" and etc. how can
> see/change these settings?

I doubt that is related to your crash.

Ian.

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
http://lists.xen.org/xen-users