Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754143Ab0ADXVf (ORCPT ); Mon, 4 Jan 2010 18:21:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753619Ab0ADXVe (ORCPT ); Mon, 4 Jan 2010 18:21:34 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39957 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752776Ab0ADXVe (ORCPT ); Mon, 4 Jan 2010 18:21:34 -0500 Message-ID: <4B4277B0.1080506@redhat.com> Date: Mon, 04 Jan 2010 18:20:16 -0500 From: Rik van Riel Organization: Red Hat, Inc User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.5) Gecko/20091209 Fedora/3.0-4.fc12 Lightning/1.0pre Thunderbird/3.0 MIME-Version: 1.0 To: Peter Zijlstra CC: "Paul E. McKenney" , KAMEZAWA Hiroyuki , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "minchan.kim@gmail.com" , cl@linux-foundation.org, "hugh.dickins" , Nick Piggin , Ingo Molnar , Linus Torvalds Subject: Re: [RFC][PATCH 0/8] Speculative pagefault -v3 References: <20100104182429.833180340@chello.nl> <4B42606F.3000906@redhat.com> <1262641573.6408.434.camel@laptop> In-Reply-To: <1262641573.6408.434.camel@laptop> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 841 Lines: 22 On 01/04/2010 04:46 PM, Peter Zijlstra wrote: > On Mon, 2010-01-04 at 16:41 -0500, Rik van Riel wrote: >> On 01/04/2010 01:24 PM, Peter Zijlstra wrote: >>> Patch series implementing speculative page faults for x86. >> >> Fun, but why do we need this? > > People were once again concerned with mmap_sem contention on threaded > apps on large machines. Kame-san posted some patches, but I felt they > weren't quite crazy enough ;-) In that case, I assume that somebody else (maybe Kame-san or Christoph) will end up posting a benchmark that shows how these patches help. -- All rights reversed. -- 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/