From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx206.postini.com [74.125.245.206]) by kanga.kvack.org (Postfix) with SMTP id 8D5666B00A9 for ; Sat, 30 Jun 2012 11:19:51 -0400 (EDT) Received: by pbbrp2 with SMTP id rp2so7084407pbb.14 for ; Sat, 30 Jun 2012 08:19:50 -0700 (PDT) Message-ID: <4FEF1908.80701@gmail.com> Date: Sat, 30 Jun 2012 23:19:36 +0800 From: Nai Xia Reply-To: nai.xia@gmail.com MIME-Version: 1.0 Subject: Re: [PATCH 13/40] autonuma: CPU follow memory algorithm References: <1340895238.28750.49.camel@twins> <20120629125517.GD32637@gmail.com> <4FEDDD0C.60609@redhat.com> <1340995986.28750.114.camel@twins> <20120630012338.GY6676@redhat.com> <4FEE9310.1050908@redhat.com> <20120630130446.GB6676@redhat.com> In-Reply-To: <20120630130446.GB6676@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: To: Andrea Arcangeli Cc: dlaor@redhat.com, Peter Zijlstra , Ingo Molnar , Hillf Danton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Dan Smith , Linus Torvalds , Andrew Morton , Thomas Gleixner , Ingo Molnar , Paul Turner , Suresh Siddha , Mike Galbraith , "Paul E. McKenney" , Lai Jiangshan , Bharata B Rao , Lee Schermerhorn , Rik van Riel , Johannes Weiner , Srivatsa Vaddagiri , Christoph Lameter , Alex Shi , Mauricio Faria de Oliveira , Konrad Rzeszutek Wilk , Don Morris , Benjamin Herrenschmidt On 2012a1'06ae??30ae?JPY 21:04, Andrea Arcangeli wrote: > On Sat, Jun 30, 2012 at 02:58:29PM +0800, Nai Xia wrote: >> OK, I think I'd stop discussing this topic now. Without strict and comprehensive >> research on this topic, further arguments seems to me to be purely based on >> imagination. > > I suggest to consider how ptep_clear_and_test_young works on the > pte_young bit on the VM swapping code. Then apply your "concern" to > the pte_young bit scan. If you can't NAK the swapping code in the > kernel, well I guess you can't nack AutoNUMA as well because of that > specific concern. > > And no I'm not saying this is trivial or obvious, I appreciate your > thoughts a lot, just I'm quite convinced this is a subtle detail but > an irrelevant one that gets lost in the noise. > >> If you insist on ignoring any constructive suggestions from others, >> it's pretty much ok to do so. But I (and possibly many others who are >> watching) >> am pretty much possible to do a LOL to your development style. > > Well if you think answering your emails means ignoring your > suggestions, be my guest. Thanks for you kindness, I was just feeling a little bit uncomfortable about Dor's tune of "Anyone can beat anything". It's OK now, since anyone with eyes can easily find out I am not a spamming person on this list. Thanks, Nai -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org