Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753265AbZLYMTM (ORCPT ); Fri, 25 Dec 2009 07:19:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752418AbZLYMTL (ORCPT ); Fri, 25 Dec 2009 07:19:11 -0500 Received: from casper.infradead.org ([85.118.1.10]:55621 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752074AbZLYMTK (ORCPT ); Fri, 25 Dec 2009 07:19:10 -0500 Date: Fri, 25 Dec 2009 13:21:16 +0100 From: Arjan van de Ven To: Andi Kleen Cc: Linus Torvalds , Andi Kleen , Mark Hounschell , "Pallipadi, Venkatesh" , "dmarkh@cfl.rr.com" , Alain Knaff , Linux Kernel Mailing List , "fdutils@fdutils.linux.lu" , "Li, Shaohua" , Ingo Molnar Subject: Re: [Fdutils] DMA cache consistency bug introduced in 2.6.28 Message-ID: <20091225132116.6c9089f2@infradead.org> In-Reply-To: <20091223170832.GH20539@basil.fritz.box> References: <4B310879.9050701@compro.net> <1261525076.16916.4.camel@localhost.localdomain> <4B3162BC.9000508@cfl.rr.com> <4B3214EC.6020308@compro.net> <6598A4E21F1DB24D80BF72956484F59802EFD1C6@orsmsx001.amr.corp.intel.com> <4B32386B.2060509@compro.net> <87bphpd4rt.fsf@basil.nowhere.org> <20091223170832.GH20539@basil.fritz.box> Organization: Intel X-Mailer: Claws Mail 3.7.3 (GTK+ 2.16.6; i586-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 789 Lines: 21 On Wed, 23 Dec 2009 18:08:32 +0100 Andi Kleen wrote: > I removed that code when moving to 64bit (floppy driver disabling C1), > but perhaps we need some variant of it again (but it's the first such > report in many years). Although it would be sad to have it again on > all systems. at least now we have the pmqos infrastructure, driver just needs to ask for 0 latency ;) -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/