From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Garrett Subject: Re: [PATCH] ACPI: cap off P-state transition latency from buggy BIOSes Date: Fri, 20 Mar 2009 04:02:00 +0000 Message-ID: <20090320040200.GA29829@srcf.ucam.org> References: <20090319214140.GA28868@linux-os.sc.intel.com> <20090319214746.GC24898@srcf.ucam.org> <20090320035016.GA28010@khazad-dum.debian.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from cavan.codon.org.uk ([93.93.128.6]:37985 "EHLO vavatch.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750699AbZCTECJ (ORCPT ); Fri, 20 Mar 2009 00:02:09 -0400 Content-Disposition: inline In-Reply-To: <20090320035016.GA28010@khazad-dum.debian.net> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Henrique de Moraes Holschuh Cc: "Pallipadi, Venkatesh" , Len Brown , linux-acpi On Fri, Mar 20, 2009 at 12:50:16AM -0300, Henrique de Moraes Holschuh wrote: > On Thu, 19 Mar 2009, Matthew Garrett wrote: > > 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 > > > > We've confirmed that this also helps on the X31. > > > > Acked-by: Matthew Garrett > > Any chance of sending this to -stable after it hits mainline? It is the > sort of stuff a huge number of thinkpad users will want in their kernels > ASAP... I don't see why not. -- Matthew Garrett | mjg59@srcf.ucam.org