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From: Borislav Petkov <bp@alien8.de>
To: "Jörg-Volker Peetz" <jvpeetz@web.de>
Cc: linux-kernel@vger.kernel.org,
	Boris Ostrovsky <boris.ostrovsky@amd.com>,
	Andreas Herrmann <andreas.herrmann3@amd.com>,
	Borislav Petkov <borislav.petkov@amd.com>
Subject: Re: Linux 2.6.38.4 : regression due to x86 AMD ARAT feature
Date: Sun, 24 Apr 2011 20:20:41 +0200	[thread overview]
Message-ID: <20110424182041.GA19984@liondog.tnic> (raw)
In-Reply-To: <4DB3DA0C.1050003@web.de>

On Sun, Apr 24, 2011 at 10:06:36AM +0200, Jörg-Volker Peetz wrote:
> With 2.6.38.4 the clock slows down and the affected laptop sometimes, e.g. for
> the output of "ps axuw" to appear, needs an input from the keyboard or the
> touchpad. Please find attached the kernel config file and the output of dmesg.
> 
> Commenting out the the lines
> 
> 	if (c->x86 >= 0xf && !cpu_has_amd_erratum(amd_erratum_400))
> 		set_cpu_cap(c, X86_FEATURE_ARAT);
> 
> in arch/x86/kernel/cpu/amd.c makes this laptop work as before with kernel
> 2.6.38.3. I think these lines came with commit
> d7b7f0c401303dd7eafcff11752fe74d3b75c766.

Hmm, interesting.

Can you send also /proc/cpuinfo please?

Looks like your CPU is a single core K8 revE or something but we'd need
the exact family info.

Thanks.

-- 
Regards/Gruss,
    Boris.

  reply	other threads:[~2011-04-24 18:20 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-04-21 21:39 Linux 2.6.38.4 Greg KH
2011-04-21 21:39 ` Greg KH
2011-04-24  8:06 ` Linux 2.6.38.4 : regression due to x86 AMD ARAT feature Jörg-Volker Peetz
2011-04-24 18:20   ` Borislav Petkov [this message]
2011-04-24 18:55     ` Jörg-Volker Peetz
2011-04-24 19:44       ` Ostrovsky, Boris
2011-04-25 14:04         ` Jörg-Volker Peetz
2011-04-29 18:34         ` Jiri Slaby
2011-04-29 18:56           ` Borislav Petkov

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