From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matthew Garrett <mjg59@srcf.ucam.org>
Subject: Re: [PATCH] ACPI: cap off P-state transition latency from buggy BIOSes
Date: Thu, 19 Mar 2009 21:47:46 +0000
Message-ID: <20090319214746.GC24898@srcf.ucam.org>
References: <20090319214140.GA28868@linux-os.sc.intel.com>
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To: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>
Cc: Len Brown <lenb@kernel.org>, linux-acpi <linux-acpi@vger.kernel.org>

On Thu, Mar 19, 2009 at 02:41:40PM -0700, Pallipadi, Venkatesh wrote:

> Fix it by capping-off the transition latency to 20uS for native MSR based
> frequency transitions.
> 
> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>

We've confirmed that this also helps on the X31.

Acked-by: Matthew Garrett <mjg@redhat.com>

-- 
Matthew Garrett | mjg59@srcf.ucam.org