From mboxrd@z Thu Jan  1 00:00:00 1970
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon
 panic
Date: Thu, 03 Feb 2011 07:28:22 -0800
Message-ID: <4D4AC996.4070307@zytor.com>
References: <20110125134748.GA10051@laptop> <20110125140948.GA26762@elte.hu> <20110125150834.GD27510@htj.dyndns.org> <20110203143644.GA4085@ucw.cz>
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To: Pavel Machek <pavel@ucw.cz>
Cc: Tejun Heo <tj@kernel.org>, Ingo Molnar <mingo@elte.hu>, "Ahmed S. Darwish" <darwish.07@gmail.com>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, X86-ML <x86@kernel.org>, Tony Luck <tony.luck@intel.com>, Dave Jones <davej@redhat.com>, Andrew Morton <akpm@linux-foundation.org>, Randy Dunlap <rdunlap@xenotime.net>, Willy Tarreau <wtarreau@hera.kernel.org>, Willy Tarreau <w@1wt.eu>, Dirk Hohndel <hohndel@infradead.org>, Dirk.Hohndel@intel.com, IDE-ML <linux-ide@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>, Linus Torvalds <torvalds@linux-foundation.org>, Peter Zijlstra <a.p.zijlstra@chello.nl>, Fr?d?ric Weisbecker <fweisbec@gmail.com>, Borislav Petkov <bp@alien8.de>, Arjan van de Ven <arjan@infradead.org>

On 02/03/2011 06:36 AM, Pavel Machek wrote:
> 
> Could we read the log area, first, verify it contains signature, write
> it back?
> 								Pavel

Yes, but that doesn't guarantee no data corruption caused by handing
over from one driver to another.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.