From: Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
To: Dan Williams <dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Peter Jones <pjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Ard Biesheuvel
<ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: 4.9-rc1 boot regression, ambiguous bisect result
Date: Fri, 21 Oct 2016 21:20:36 +0100 [thread overview]
Message-ID: <20161021202022.GI27807@codeblueprint.co.uk> (raw)
In-Reply-To: <20161021154129.GH27807-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
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
WARNING: multiple messages have this Message-ID (diff)
From: Matt Fleming <matt@codeblueprint.co.uk>
To: Dan Williams <dan.j.williams@intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-efi@vger.kernel.org, Peter Jones <pjones@redhat.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Ingo Molnar <mingo@kernel.org>
Subject: Re: 4.9-rc1 boot regression, ambiguous bisect result
Date: Fri, 21 Oct 2016 21:20:36 +0100 [thread overview]
Message-ID: <20161021202022.GI27807@codeblueprint.co.uk> (raw)
In-Reply-To: <20161021154129.GH27807@codeblueprint.co.uk>
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
next prev parent reply other threads:[~2016-10-21 20:20 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-20 4:04 4.9-rc1 boot regression, ambiguous bisect result Dan Williams
2016-10-20 4:04 ` Dan Williams
2016-10-20 6:24 ` Ingo Molnar
2016-10-20 12:29 ` Matt Fleming
[not found] ` <20161020122931.GD19876-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-10-20 15:22 ` Dan Williams
2016-10-20 15:22 ` Dan Williams
[not found] ` <CAPcyv4hT+yQvnQzfb49FP-+vVaVKHTYEj1EjNd9Xvu0Wr8T+Bg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-10-20 19:37 ` Dan Williams
2016-10-20 19:37 ` Dan Williams
2016-10-21 7:00 ` Ingo Molnar
2016-10-21 18:20 ` Dan Williams
[not found] ` <CAPcyv4gE0wtoR3Yxh6axiQpPE2MvDgGW=JLEz9b7OMSBQZ_HDQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-10-21 15:41 ` Matt Fleming
2016-10-21 15:41 ` Matt Fleming
[not found] ` <20161021154129.GH27807-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-10-21 20:20 ` Matt Fleming [this message]
2016-10-21 20:20 ` Matt Fleming
[not found] ` <20161021202022.GI27807-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-10-21 23:20 ` Dan Williams
2016-10-21 23:20 ` Dan Williams
[not found] ` <CAPcyv4jkVcBwecxwt1P+p-fMSuen9B9xHEVf0BjM5uJZ4_jAdw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-10-30 12:08 ` Thorsten Leemhuis
2016-10-30 12:08 ` Thorsten Leemhuis
[not found] ` <4a73a7d8-599c-eb25-0f78-d921a16bb56f-rCxcAJFjeRkk+I/owrrOrA@public.gmane.org>
2016-10-30 15:59 ` Dan Williams
2016-10-30 15:59 ` Dan Williams
[not found] ` <CAPcyv4gNyUMU+r-N-qa6ZrF0zG2AuirR0NqVRu40jAgNqc5MNw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-10-31 9:38 ` Matt Fleming
2016-10-31 9:38 ` Matt Fleming
2016-11-03 0:41 ` Neri, Ricardo
2016-11-03 5:18 ` Dan Williams
2016-11-03 5:18 ` Dan Williams
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