From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from coco.kroah.org (kroah.org [198.145.64.141]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "coco.kroah.org", Issuer "Greg KH" (not verified)) by ozlabs.org (Postfix) with ESMTPS id D2D49B70A4 for ; Sun, 1 Aug 2010 05:58:42 +1000 (EST) Date: Sat, 31 Jul 2010 12:55:06 -0700 From: Greg KH To: Benjamin Herrenschmidt Subject: Re: [PATCH 0/8] v3 De-couple sysfs memory directories from memory sections Message-ID: <20100731195506.GC4644@kroah.com> References: <4C451BF5.50304@austin.ibm.com> <1280554584.1902.31.camel@pasglop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1280554584.1902.31.camel@pasglop> Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, KAMEZAWA Hiroyuki , linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Sat, Jul 31, 2010 at 03:36:24PM +1000, Benjamin Herrenschmidt wrote: > On Mon, 2010-07-19 at 22:45 -0500, Nathan Fontenot wrote: > > This set of patches de-couples the idea that there is a single > > directory in sysfs for each memory section. The intent of the > > patches is to reduce the number of sysfs directories created to > > resolve a boot-time performance issue. On very large systems > > boot time are getting very long (as seen on powerpc hardware) > > due to the enormous number of sysfs directories being created. > > On a system with 1 TB of memory we create ~63,000 directories. > > For even larger systems boot times are being measured in hours. > > Greg, Kame, how do we proceed with these ? I'm happy to put them in > powerpc.git with appropriate acks or will you take them ? I thought there would be at least one more round of these patches based on the review comments, right? I'll be glad to take them when everyone agrees with them. thanks, greg k-h From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756523Ab0GaT6k (ORCPT ); Sat, 31 Jul 2010 15:58:40 -0400 Received: from kroah.org ([198.145.64.141]:39086 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755147Ab0GaT6j (ORCPT ); Sat, 31 Jul 2010 15:58:39 -0400 Date: Sat, 31 Jul 2010 12:55:06 -0700 From: Greg KH To: Benjamin Herrenschmidt Cc: Nathan Fontenot , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@ozlabs.org, KAMEZAWA Hiroyuki Subject: Re: [PATCH 0/8] v3 De-couple sysfs memory directories from memory sections Message-ID: <20100731195506.GC4644@kroah.com> References: <4C451BF5.50304@austin.ibm.com> <1280554584.1902.31.camel@pasglop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1280554584.1902.31.camel@pasglop> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jul 31, 2010 at 03:36:24PM +1000, Benjamin Herrenschmidt wrote: > On Mon, 2010-07-19 at 22:45 -0500, Nathan Fontenot wrote: > > This set of patches de-couples the idea that there is a single > > directory in sysfs for each memory section. The intent of the > > patches is to reduce the number of sysfs directories created to > > resolve a boot-time performance issue. On very large systems > > boot time are getting very long (as seen on powerpc hardware) > > due to the enormous number of sysfs directories being created. > > On a system with 1 TB of memory we create ~63,000 directories. > > For even larger systems boot times are being measured in hours. > > Greg, Kame, how do we proceed with these ? I'm happy to put them in > powerpc.git with appropriate acks or will you take them ? I thought there would be at least one more round of these patches based on the review comments, right? I'll be glad to take them when everyone agrees with them. thanks, greg k-h From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with ESMTP id 805786B02B4 for ; Sat, 31 Jul 2010 15:58:40 -0400 (EDT) Date: Sat, 31 Jul 2010 12:55:06 -0700 From: Greg KH Subject: Re: [PATCH 0/8] v3 De-couple sysfs memory directories from memory sections Message-ID: <20100731195506.GC4644@kroah.com> References: <4C451BF5.50304@austin.ibm.com> <1280554584.1902.31.camel@pasglop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1280554584.1902.31.camel@pasglop> Sender: owner-linux-mm@kvack.org To: Benjamin Herrenschmidt Cc: Nathan Fontenot , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@ozlabs.org, KAMEZAWA Hiroyuki List-ID: On Sat, Jul 31, 2010 at 03:36:24PM +1000, Benjamin Herrenschmidt wrote: > On Mon, 2010-07-19 at 22:45 -0500, Nathan Fontenot wrote: > > This set of patches de-couples the idea that there is a single > > directory in sysfs for each memory section. The intent of the > > patches is to reduce the number of sysfs directories created to > > resolve a boot-time performance issue. On very large systems > > boot time are getting very long (as seen on powerpc hardware) > > due to the enormous number of sysfs directories being created. > > On a system with 1 TB of memory we create ~63,000 directories. > > For even larger systems boot times are being measured in hours. > > Greg, Kame, how do we proceed with these ? I'm happy to put them in > powerpc.git with appropriate acks or will you take them ? I thought there would be at least one more round of these patches based on the review comments, right? I'll be glad to take them when everyone agrees with them. thanks, greg k-h -- 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