Re: 4.9-rc1 boot regression, ambiguous bisect result

[Matt Fleming]

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