From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 44109B70A4 for ; Sat, 31 Jul 2010 15:38:46 +1000 (EST) Subject: Re: [PATCH 0/8] v3 De-couple sysfs memory directories from memory sections From: Benjamin Herrenschmidt To: Nathan Fontenot In-Reply-To: <4C451BF5.50304@austin.ibm.com> References: <4C451BF5.50304@austin.ibm.com> Content-Type: text/plain; charset="UTF-8" Date: Sat, 31 Jul 2010 15:36:24 +1000 Message-ID: <1280554584.1902.31.camel@pasglop> Mime-Version: 1.0 Cc: linux-mm@kvack.org, greg@kroah.com, 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 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 ? Cheers, Ben. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752709Ab0GaFiu (ORCPT ); Sat, 31 Jul 2010 01:38:50 -0400 Received: from gate.crashing.org ([63.228.1.57]:42790 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752138Ab0GaFis (ORCPT ); Sat, 31 Jul 2010 01:38:48 -0400 Subject: Re: [PATCH 0/8] v3 De-couple sysfs memory directories from memory sections From: Benjamin Herrenschmidt To: Nathan Fontenot Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@ozlabs.org, greg@kroah.com, KAMEZAWA Hiroyuki In-Reply-To: <4C451BF5.50304@austin.ibm.com> References: <4C451BF5.50304@austin.ibm.com> Content-Type: text/plain; charset="UTF-8" Date: Sat, 31 Jul 2010 15:36:24 +1000 Message-ID: <1280554584.1902.31.camel@pasglop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 ? Cheers, Ben. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with ESMTP id 5897A6B02A8 for ; Sat, 31 Jul 2010 01:38:44 -0400 (EDT) Subject: Re: [PATCH 0/8] v3 De-couple sysfs memory directories from memory sections From: Benjamin Herrenschmidt In-Reply-To: <4C451BF5.50304@austin.ibm.com> References: <4C451BF5.50304@austin.ibm.com> Content-Type: text/plain; charset="UTF-8" Date: Sat, 31 Jul 2010 15:36:24 +1000 Message-ID: <1280554584.1902.31.camel@pasglop> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Nathan Fontenot Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@ozlabs.org, greg@kroah.com, KAMEZAWA Hiroyuki List-ID: 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 ? Cheers, Ben. -- 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