Re: 4.9-rc1 boot regression, ambiguous bisect result

[Dan Williams]

On Fri, Oct 21, 2016 at 1:20 PM, Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx> wrote:
> On Fri, 21 Oct, at 04:41:29PM, Matt Fleming wrote:
>>
>> FYI, I've been able to reproduce some crash when using your EFI memory
>> map layout under Qemu and forcing the ESRT driver to reserve the space.
>
> Nope, that was a bug in my hack. I can't get Qemu to crash while using
> your memory map layout.
>
> Any chance you can insert "while(1)" loops into the EFI boot paths for
> a kernel that is known to reboot or trigger a triple fault in kernels
> that hang, so that we can narrow in on the issue. See,
>
>   http://www.codeblueprint.co.uk/2015/04/early-x86-linux-boot-debug-tricks.html

I can take a look, but it will not be until Monday when I have
physical access to the system again.