From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753514AbYDTVwR (ORCPT ); Sun, 20 Apr 2008 17:52:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752217AbYDTVv7 (ORCPT ); Sun, 20 Apr 2008 17:51:59 -0400 Received: from one.firstfloor.org ([213.235.205.2]:58045 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751875AbYDTVv6 (ORCPT ); Sun, 20 Apr 2008 17:51:58 -0400 Message-ID: <480BBAF9.1040702@firstfloor.org> Date: Sun, 20 Apr 2008 23:51:53 +0200 From: Andi Kleen User-Agent: Thunderbird 1.5.0.12 (X11/20060911) MIME-Version: 1.0 To: Andrew Morton CC: Arjan van de Ven , dhazelton@enter.net, bunk@kernel.org, alan@lxorguk.ukuu.org.uk, shawn.bohrer@gmail.com, mingo@elte.hu, linux-kernel@vger.kernel.org, tglx@linutronix.de Subject: Re: x86: 4kstacks default References: <200804181737.m3IHbabI010051@hera.kernel.org> <20080420104444.GI1595@cs181133002.pp.htv.fi> <87y778aezh.fsf@basil.nowhere.org> <200804201144.33308.dhazelton@enter.net> <480B7CB2.3080002@firstfloor.org> <20080420114845.77bf3fed@laptopd505.fenrus.org> <20080420144512.d28e5bd2.akpm@linux-foundation.org> In-Reply-To: <20080420144512.d28e5bd2.akpm@linux-foundation.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Andrew Morton wrote: >> On Sun, 20 Apr 2008 11:48:45 -0700 Arjan van de Ven wrote: >> We don't have effective physical address based reclaim yet for higher order allocs. > > Lumpy reclaim is supposed to be exactly that. Also if order 1 allocs were a significant problem on i386 we must have had lots of reports of EAGAIN on fork/clone with !4k stack kernels. I'm not aware of an significant number of such reports (there were a few occasionally, but that is probably normal and unavoidable and can be caused by other things too like simply running out of lowmem) -Andi