From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with ESMTP id 6BEF96B004A for ; Tue, 28 Sep 2010 11:23:09 -0400 (EDT) Received: from d01relay01.pok.ibm.com (d01relay01.pok.ibm.com [9.56.227.233]) by e7.ny.us.ibm.com (8.14.4/8.13.1) with ESMTP id o8SF2auv000864 for ; Tue, 28 Sep 2010 11:02:36 -0400 Received: from d01av03.pok.ibm.com (d01av03.pok.ibm.com [9.56.224.217]) by d01relay01.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o8SFHhg0319914 for ; Tue, 28 Sep 2010 11:17:43 -0400 Received: from d01av03.pok.ibm.com (loopback [127.0.0.1]) by d01av03.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id o8SFHgjW018272 for ; Tue, 28 Sep 2010 12:17:43 -0300 Subject: Re: [PATCH 0/8] v2 De-Couple sysfs memory directories from memory sections From: Dave Hansen In-Reply-To: <4CA1E338.6070201@redhat.com> References: <4CA0EBEB.1030204@austin.ibm.com> <4CA1E338.6070201@redhat.com> Content-Type: text/plain; charset="ANSI_X3.4-1968" Date: Tue, 28 Sep 2010 08:17:36 -0700 Message-ID: <1285687056.19976.6155.camel@nimitz> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Avi Kivity Cc: Nathan Fontenot , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@ozlabs.org, Greg KH , KAMEZAWA Hiroyuki List-ID: On Tue, 2010-09-28 at 14:44 +0200, Avi Kivity wrote: > Why not update sysfs directory creation to be fast, for example by using > an rbtree instead of a linked list. This fixes an implementation > problem in the kernel instead of working around it and creating a new ABI. > > New ABIs mean old tools won't work, and new tools need to understand > both ABIs. Just to be clear _these_ patches do not change the existing ABI. They do add a new ABI: the end_phys_index file. But, it is completely redundant at the moment. It could be taken out of these patches. That said, fixing the directory creation speed is probably a worthwhile endeavor too. -- Dave -- 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