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Re: 4.9-rc1 boot regression, ambiguous bisect result

From Matt Fleming <matt@codeblueprint.co.uk>
Newsgroups linux.kernel
Subject Re: 4.9-rc1 boot regression, ambiguous bisect result
Date 2016-10-21 22:30 +0200
Message-ID <suOBY-2ad-15@gated-at.bofh.it> (permalink)
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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

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Thread

4.9-rc1 boot regression, ambiguous bisect result Dan Williams <dan.j.williams@intel.com> - 2016-10-20 06:10 +0200
  Re: 4.9-rc1 boot regression, ambiguous bisect result Ingo Molnar <mingo@kernel.org> - 2016-10-20 08:30 +0200
  Re: 4.9-rc1 boot regression, ambiguous bisect result Matt Fleming <matt@codeblueprint.co.uk> - 2016-10-20 14:30 +0200
    Re: 4.9-rc1 boot regression, ambiguous bisect result Dan Williams <dan.j.williams@intel.com> - 2016-10-20 17:30 +0200
      Re: 4.9-rc1 boot regression, ambiguous bisect result Dan Williams <dan.j.williams@intel.com> - 2016-10-20 21:40 +0200
        Re: 4.9-rc1 boot regression, ambiguous bisect result Ingo Molnar <mingo@kernel.org> - 2016-10-21 09:10 +0200
          Re: 4.9-rc1 boot regression, ambiguous bisect result Dan Williams <dan.j.williams@intel.com> - 2016-10-21 20:30 +0200
        Re: 4.9-rc1 boot regression, ambiguous bisect result Matt Fleming <matt@codeblueprint.co.uk> - 2016-10-21 17:50 +0200
          Re: 4.9-rc1 boot regression, ambiguous bisect result Matt Fleming <matt@codeblueprint.co.uk> - 2016-10-21 22:30 +0200
            Re: 4.9-rc1 boot regression, ambiguous bisect result Dan Williams <dan.j.williams@intel.com> - 2016-10-22 01:30 +0200

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