[BUG] Spontaneous reboot loading dom0 for first time after cold boot

[BUG] Spontaneous reboot loading dom0 for first time after cold boot

[Peter Kay]

What's the procedure for diagnosing xen boot issues if it doesn't manage to load dom0?

The first time xen loads following a cold boot the xen hypervisor boots but there is a spontaneous reboot immediately prior to dom0 loading. Subsequent reboots work fine.

This used to be fine a few months back. Unstable code from at least a week back till a couple of nights ago exhibits the issue.

Platform : SH3210SHLC 3210 chipset with a Q6700 running Debian Wheezy and kernel 3.16. Pretty certain I also exhibited the issue with 3.2.0.4

This issue does not occur with a non xen boot using the same kernel

Any advice welcome

PK

Re: [BUG] Spontaneous reboot loading dom0 for first time after cold boot

[Andrew Cooper]

On 12/08/14 12:12, Peter Kay wrote:
> What's the procedure for diagnosing xen boot issues if it doesn't manage to load dom0?
>
> The first time xen loads following a cold boot the xen hypervisor boots but there is a spontaneous reboot immediately prior to dom0 loading. Subsequent reboots work fine.
>
> This used to be fine a few months back. Unstable code from at least a week back till a couple of nights ago exhibits the issue.
>
> Platform : SH3210SHLC 3210 chipset with a Q6700 running Debian Wheezy and kernel 3.16. Pretty certain I also exhibited the issue with 3.2.0.4
>
> This issue does not occur with a non xen boot using the same kernel
>
> Any advice welcome
>
> PK

Best would be to get serial set up, and use "com1=115200,8n1" on the Xen
command line. 

Failing that, "console=vga noreboot" might show a stack trace on the screen.

~Andrew

Re: [BUG] Spontaneous reboot loading dom0 for first time after cold boot

[Vitaly Kuznetsov]

Peter Kay <syllopsium@syllopsium.co.uk> writes:

> What's the procedure for diagnosing xen boot issues if it doesn't manage to load dom0?
>
> The first time xen loads following a cold boot the xen hypervisor
> boots but there is a spontaneous reboot immediately prior to dom0
> loading. Subsequent reboots work fine.

You can add noreboot=true hypervisor option to see if it crashes.

>
> This used to be fine a few months back. Unstable code from at least a week back till a couple of nights ago exhibits the issue.
>
> Platform : SH3210SHLC 3210 chipset with a Q6700 running Debian Wheezy and kernel 3.16. Pretty certain I also exhibited the issue with 3.2.0.4
>
> This issue does not occur with a non xen boot using the same kernel
>
> Any advice welcome
>
> PK
>
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-- 
  Vitaly