From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d01relay04.pok.ibm.com (d01relay04.pok.ibm.com [9.56.227.236]) by e6.ny.us.ibm.com (8.12.11/8.12.11) with ESMTP id j1SGCb6w020042 for ; Mon, 28 Feb 2005 11:12:37 -0500 Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by d01relay04.pok.ibm.com (8.12.10/NCO/VER6.6) with ESMTP id j1SGCX9m240792 for ; Mon, 28 Feb 2005 11:12:37 -0500 Received: from d01av01.pok.ibm.com (loopback [127.0.0.1]) by d01av01.pok.ibm.com (8.12.11/8.12.11) with ESMTP id j1SGCXu6019528 for ; Mon, 28 Feb 2005 11:12:33 -0500 Subject: Re: [PATCH] 0/2 Buddy allocator with placement policy + prezeroing From: Dave Hansen In-Reply-To: <20050227134219.B4346ECE4@skynet.csn.ul.ie> References: <20050227134219.B4346ECE4@skynet.csn.ul.ie> Content-Type: text/plain Date: Mon, 28 Feb 2005 08:12:07 -0800 Message-Id: <1109607127.6921.14.camel@localhost> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Mel Gorman Cc: linux-mm , Linux Kernel Mailing List List-ID: On Sun, 2005-02-27 at 13:42 +0000, Mel Gorman wrote: > In the two following emails are the latest version of the placement policy > for the binary buddy allocator to reduce fragmentation and the prezeroing > patch. The changelogs are with the patches although the most significant change > to the placement policy is a fix for a bug in the usemap size calculation > (pointed out by Mike Kravetz). > > The placement policy is Even Better than previous versions and can allocate > over 100 2**10 blocks of pages under loads in excess of 30 so I still > consider it ready for inclusion to the mainline. ... This patch does some important things for memory hotplug: it explicitly marks the different types of kernel allocations, and it separates those different types in the allocator. When it comes to memory hot-remove this is certainly something we were going to have to do anyway. Plus, I believe there are already at least two prototype patches that do this. Anything that makes future memory hotplug work easier is good in my book. :) -- 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: aart@kvack.org