linux-kernel - Re: [PATCH 0/2] AMD ARAT fixes

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Message-ID: <4DD2A496.8000407@web.de>
Date:	Tue, 17 May 2011 18:38:46 +0200
From:	Jörg-Volker Peetz <jvpeetz@....de>
To:	Borislav Petkov <bp@...64.org>
CC:	Nick Bowler <nbowler@...iptictech.com>,
	Jörg-Volker Peetz 
	<jvpeetz@....de>, Boris Ostrovsky <boris.ostrovsky@....com>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	Greg Kroah-Hartman <greg@...ah.com>,
	Hans Rosenfeld <hans.rosenfeld@....com>,
	X86-ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <borislav.petkov@....com>
Subject: Re: [PATCH 0/2] AMD ARAT fixes

Borislav Petkov wrote, on 05/17/11 14:55:
> From: Borislav Petkov <borislav.petkov@....com>
> 
> Hi all,
> 
> the following 2 patches address the fallout caused by
> b87cf80af3ba4b4c008b4face3c68d604e1715c6. They enable ARAT only on
> Fam10h and later, and leaves out K8 due to multiple problems there.
> 
> Although the patches look almost trivial, I'd like to ask Nick and
> Jörg-Volker to test them, please, so that we can have a confirmation,
> just in case.
> 
> Then, if we're lucky and Linus hasn't released .39 yet, we might sneak
> them in, if we ask people politely :).
> 
> Thanks.
> 
> 

A kernel version 2.6.38.6 patched with your two patches modifying only
arch/x86/kernel/cpu/amd.c starts and runs without problems on the affected
system with a AMD Turion 64 processor. The system is pure x86_64 (Debian
Release: wheezy/sid) with gcc version 4.6.1 20110428 (prerelease) (Debian
4.6.0-6) and GNU C Library (Debian EGLIBC 2.13-4) stable release version 2.13.

The only obvious difference I see is the message "using C1E aware idle routine"
in dmesg.
-- 
Best regards,
Jörg-Volker.

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