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 3EB416B0062 for ; Wed, 4 Nov 2009 16:02:25 -0500 (EST) Subject: Re: [MM] Remove rss batching from copy_page_range() From: Andi Kleen References: Date: Wed, 04 Nov 2009 22:02:20 +0100 In-Reply-To: (Christoph Lameter's message of "Wed, 4 Nov 2009 14:17:24 -0500 (EST)") Message-ID: <87my3280mb.fsf@basil.nowhere.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-linux-mm@kvack.org To: Christoph Lameter Cc: KAMEZAWA Hiroyuki , "hugh.dickins@tiscali.co.uk" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, Tejun Heo List-ID: Christoph Lameter writes: > From: Christoph Lameter > Subject: Remove rss batching from copy_page_range() > > With per cpu counters in mm there is no need for batching > mm counter updates anymore. Update counters directly while > copying pages. Hmm, but with all the inlining with some luck the local counters will be in registers. That will never be the case with the per cpu counters. So I'm not sure it's really an improvement? -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