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Message-ID: <20110429195548.GA17166@elte.hu>
Date: Fri, 29 Apr 2011 21:55:48 +0200
From: Ingo Molnar <mingo@...e.hu>
To: Boris Ostrovsky <ostr@...64.org>
Cc: x86@...nel.org, linux-kernel@...r.kernel.org, jvpeetz@....de,
borislav.petkov@....com, boris.ostrovsky@....com
Subject: Re: [PATCH] Subject: [PATCH] x86, AMD: K8 Rev.A-E processors are
subject to erratum 400
* Boris Ostrovsky <ostr@...64.org> wrote:
> Signed-off-by: Boris Ostrovsky <Boris.Ostrovsky@....com>
> Acked-by: Borislav Petkov <borislav.petkov@....com>
> Reported-by: Joerg-Volker Peetz <jvpeetz@....de>
> Tested-by: Joerg-Volker Peetz <jvpeetz@....de>
>
> Older AMD K8 processors (Revisions A-E) are affected by erratum 400 (APIC
> timer interrupts don't occur in C states greater than C1). This, for example,
> means that X86_FEATURE_ARAT flag should not be set for these parts.
>
> This addresses regression introduced by commit
> b87cf80af3ba4b4c008b4face3c68d604e1715c6 (x86, AMD: Set ARAT feature on AMD
> processors") so it is somewhat high priority.
Hm, what is the regression, how do users see it? Hangs? Delays? Crashes?
Something more benign? The changelog should really contain such information.
Thanks,
Ingo
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