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Re: [Xen-devel] Xen 4.7.0 boot PANIC on kernel 4.7.0-4 + UEFI ?



>>> On 03.08.16 at 15:33, <lists@xxxxxxxxxxxx> wrote:
> On Wed, Aug 3, 2016, at 02:01 AM, Jan Beulich wrote:
>> Thanks. Does the use of /mapbs really matter for booting? I was
>> assuming it would be relevant only for shutdown/reboot?
> 
> It has no effect on boot. With or without the "/mapbs" it boots Xen OK.

As expected.

> Without the "/mapbs" the system used to crash on reboot, but still continued 
> with a reboot.  Reboot with the "/mapbs" was OK.
> 
> Now, even with the "/mapbs" the system crashes on reboot.

But afaict in a different way:

>       [  196.052042] reboot: Restarting system
>       (XEN) [2016-08-03 13:06:54] Hardware Dom0 shutdown: rebooting machine
>       (XEN) [2016-08-03 13:06:54] APIC error on CPU0: 40(00)
>       (XEN) [2016-08-03 13:06:54] ----[ Xen-4.7.0_09-454  x86_64  debug=n  
> Not tainted ]----
>       (XEN) [2016-08-03 13:06:54] CPU:    0
>       (XEN) [2016-08-03 13:06:54] RIP:    e008:[<000000009e746340>] 
> 000000009e746340
>[...]
>       (XEN) [2016-08-03 13:30:44] ****************************************
>       (XEN) [2016-08-03 13:30:44] Panic on CPU 0:
>       (XEN) [2016-08-03 13:30:44] GENERAL PROTECTION FAULT
>       (XEN) [2016-08-03 13:30:44] [error_code=0000]
>       (XEN) [2016-08-03 13:30:44] ****************************************

A #GP fault in firmware code. Not much we can do about, I'm afraid,
except for having you go with one of the mentioned workarounds
(and perhaps getting in touch with the BIOS vendor).

Jan


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