From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753930AbZD1UuT (ORCPT ); Tue, 28 Apr 2009 16:50:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752403AbZD1UuE (ORCPT ); Tue, 28 Apr 2009 16:50:04 -0400 Received: from one.firstfloor.org ([213.235.205.2]:42741 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752219AbZD1UuD (ORCPT ); Tue, 28 Apr 2009 16:50:03 -0400 Date: Tue, 28 Apr 2009 22:54:03 +0200 From: Andi Kleen To: Tony Luck Cc: Matt Mackall , Wu Fengguang , Ingo Molnar , Steven Rostedt , =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker , Larry Woodman , Peter Zijlstra , Pekka Enberg , Eduard - Gabriel Munteanu , Andrew Morton , LKML , KOSAKI Motohiro , Andi Kleen , Alexey Dobriyan , "linux-mm@kvack.org" Subject: Re: [PATCH 5/5] proc: export more page flags in /proc/kpageflags Message-ID: <20090428205403.GP27382@one.firstfloor.org> References: <20090428010907.912554629@intel.com> <20090428014920.769723618@intel.com> <20090428065507.GA2024@elte.hu> <20090428083320.GB17038@localhost> <12c511ca0904281111r10f37a5coe5a2750f4dbfbcda@mail.gmail.com> <1240943671.938.575.camel@calx> <12c511ca0904281347m394b04e0mcb61f7c336752cc4@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <12c511ca0904281347m394b04e0mcb61f7c336752cc4@mail.gmail.com> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 28, 2009 at 01:47:07PM -0700, Tony Luck wrote: > On Tue, Apr 28, 2009 at 11:34 AM, Matt Mackall wrote: > > Bah. The rate of change is proportional to #cpus, not #pages. Assuming > > you've got 1024 processors, you could run the scan in parallel in .2 > > seconds still. > > That would help ... it would also make the patch to support this > functionality a lot more complex. I suspect 4TB memory users are used to some things running a little slower. I'm not sure we really need to make every obscure debugging functionality scale well to these systems too. -Andi -- ak@linux.intel.com -- Speaking for myself only. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with ESMTP id 8E8B16B003D for ; Tue, 28 Apr 2009 16:49:15 -0400 (EDT) Date: Tue, 28 Apr 2009 22:54:03 +0200 From: Andi Kleen Subject: Re: [PATCH 5/5] proc: export more page flags in /proc/kpageflags Message-ID: <20090428205403.GP27382@one.firstfloor.org> References: <20090428010907.912554629@intel.com> <20090428014920.769723618@intel.com> <20090428065507.GA2024@elte.hu> <20090428083320.GB17038@localhost> <12c511ca0904281111r10f37a5coe5a2750f4dbfbcda@mail.gmail.com> <1240943671.938.575.camel@calx> <12c511ca0904281347m394b04e0mcb61f7c336752cc4@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <12c511ca0904281347m394b04e0mcb61f7c336752cc4@mail.gmail.com> Sender: owner-linux-mm@kvack.org To: Tony Luck Cc: Matt Mackall , Wu Fengguang , Ingo Molnar , Steven Rostedt , =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker , Larry Woodman , Peter Zijlstra , Pekka Enberg , Eduard - Gabriel Munteanu , Andrew Morton , LKML , KOSAKI Motohiro , Andi Kleen , Alexey Dobriyan , "linux-mm@kvack.org" List-ID: On Tue, Apr 28, 2009 at 01:47:07PM -0700, Tony Luck wrote: > On Tue, Apr 28, 2009 at 11:34 AM, Matt Mackall wrote: > > Bah. The rate of change is proportional to #cpus, not #pages. Assuming > > you've got 1024 processors, you could run the scan in parallel in .2 > > seconds still. > > That would help ... it would also make the patch to support this > functionality a lot more complex. I suspect 4TB memory users are used to some things running a little slower. I'm not sure we really need to make every obscure debugging functionality scale well to these systems too. -Andi -- ak@linux.intel.com -- Speaking for myself only. -- 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