Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752638Ab1ESERN (ORCPT ); Thu, 19 May 2011 00:17:13 -0400 Received: from na3sys010aog112.obsmtp.com ([74.125.245.92]:58610 "HELO na3sys010aog112.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751927Ab1ESERM (ORCPT ); Thu, 19 May 2011 00:17:12 -0400 MIME-Version: 1.0 In-Reply-To: References: <20110504115324.GE17855@lsi.com> <1305616571.6008.23.camel@mulgrave.site> <20110518041551.GL15227@parisc-linux.org> <1305692584.2580.3.camel@mulgrave.site> <1305702010.2781.33.camel@pasglop> <4565AEA676113A449269C2F3A549520F80B66280@cosmail03.lsi.com> From: Roland Dreier Date: Wed, 18 May 2011 21:16:49 -0700 X-Google-Sender-Auth: tfiAep7mY5YYcrgTINyC8tKngkI Message-ID: Subject: Re: [PATCH 1/3] mpt2sas: remove the use of writeq, since writeq is not atomic To: Milton Miller Cc: Hitoshi Mitake , Sam Ravnborg , Ingo Molnar , Ingo Molnar , "Desai, Kashyap" , "Prakash, Sathya" , James Bottomley , Matthew Wilcox , Benjamin Herrenschmidt , linux scsi dev , "paulus@samba.org" , linux powerpc dev , linux pci , linux kernel , linux-arch Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 652 Lines: 16 On Wed, May 18, 2011 at 11:31 AM, Milton Miller wrote: > So the real question should be why is x86-32 supplying a broken writeq > instead of letting drivers work out what to do it when needed? Sounds a lot like what I was asking a couple of years ago :) http://lkml.org/lkml/2009/4/19/164 But Ingo insisted that non-atomic writeq would be fine: http://lkml.org/lkml/2009/4/19/167 - R. -- 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/