linux-kernel - Re: [BUG] Linux 3.14 fails to boot with new EFI changes

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Date:	Thu, 6 Feb 2014 00:15:40 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Alex Thorlton <athorlton@....com>
Cc:	Russ Anderson <rja@....com>, "H. Peter Anvin" <hpa@...or.com>,
	Matt Fleming <matt@...sole-pimps.org>,
	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org
Subject: Re: [BUG] Linux 3.14 fails to boot with new EFI changes

On Wed, Feb 05, 2014 at 03:45:36PM -0600, Alex Thorlton wrote:
> While working on an answer to this question, I ran across another issue
> on some newer hardware, that looks like it's definitely related to this
> problem, and might be the root cause.
> 
> When booting on a UV2 we die in efi_enter_virtual_mode:
> 
> BUG: unable to handle kernel paging request at 0000008f7e848020
> IP: [<000000007dadb6a9>] 0x7dadb6a8
> PGD 0

That looks very much like this other issue we're debugging right now:

http://marc.info/?l=linux-kernel&m=139115794830637

> CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.11.0-medusa-00038-gd2f7cbe #821

...

> Let me know what other information you need and I'll get it to you ASAP.

You could try to boot latest linus + Matt's 'next' branch ontop and see
whether it is exploding. I'd venture a guess and say yes but a whole
dmesg with CONFIG_EFI_PGT_DUMP and pagetable dump might still give us
some clues.

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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