Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261508AbVCCHoi (ORCPT ); Thu, 3 Mar 2005 02:44:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261493AbVCCHof (ORCPT ); Thu, 3 Mar 2005 02:44:35 -0500 Received: from smtp203.mail.sc5.yahoo.com ([216.136.129.93]:13703 "HELO smtp203.mail.sc5.yahoo.com") by vger.kernel.org with SMTP id S261500AbVCCHob (ORCPT ); Thu, 3 Mar 2005 02:44:31 -0500 Message-ID: <4226C058.4080108@yahoo.com.au> Date: Thu, 03 Mar 2005 18:44:24 +1100 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5) Gecko/20050105 Debian/1.7.5-1 X-Accept-Language: en MIME-Version: 1.0 To: Benjamin Herrenschmidt CC: "David S. Miller" , Paul Mackerras , Andrew Morton , clameter@sgi.com, Linux Kernel list , linux-ia64@vger.kernel.org, Anton Blanchard Subject: Re: Page fault scalability patch V18: Drop first acquisition of ptl References: <20050302174507.7991af94.akpm@osdl.org> <20050302185508.4cd2f618.akpm@osdl.org> <20050302201425.2b994195.akpm@osdl.org> <16934.39386.686708.768378@cargo.ozlabs.ibm.com> <20050302213831.7e6449eb.davem@davemloft.net> <1109829248.5679.178.camel@gaston> <42274727.2070200@yahoo.com.au> <1109831428.5680.187.camel@gaston> In-Reply-To: <1109831428.5680.187.camel@gaston> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 868 Lines: 25 Benjamin Herrenschmidt wrote: > On Fri, 2005-03-04 at 04:19 +1100, Nick Piggin wrote: > > >>You don't want to do that for all architectures, as I said earlier. >>eg. i386 can concurrently set the dirty bit with the MMU (which won't >>honour the lock). >> >>So you then need an atomic lock, atomic pte operations, and atomic >>unlock where previously you had only the atomic pte operation. This is >>disastrous for performance. > > > Of course, but I was answering to David about sparc64 which uses > software TLB load :) > Oh sorry, I completely misunderstood what you said... and the context in which you said it :P - 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/