Re: [Xen-devel] debian stretch dom0 + xen 4.9 fails to boot

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 07.06.17 at 17:40, <Paul.Durrant@xxxxxxxxxx> wrote:
>> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
>> Sent: 07 June 2017 16:33
>>
>> Since you said it doesn't
>> make it to the point where Xen would do any normal output, have
>> you been able to narrow down how far it gets? I think this is one
>> of the few remaining avenues to gain some more understanding.
>> 
> 
> Yes, that's what I'm now attempting. Andrew has some serial logging patches 
> that I'm going to try to convert to VGA logging.

If the box hangs rather than rebooting that's an option. The
"canonical" debugging method I've used to use in such cases
is to leverage the fact that most chipsets leave at least the
unused ports in the 0x81...0x8f range untouched across boot,
so I've stored progress indicators and/or auxiliary data there,
reading them out upon next boot. But I have no library for
doing so (and this also was mostly for projects I worked on
prior to turning to Xen and Linux) ...

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel