Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263168AbVCXSpa (ORCPT ); Thu, 24 Mar 2005 13:45:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261618AbVCXSpa (ORCPT ); Thu, 24 Mar 2005 13:45:30 -0500 Received: from omx1-ext.sgi.com ([192.48.179.11]:12737 "EHLO omx1.americas.sgi.com") by vger.kernel.org with ESMTP id S263160AbVCXSnC (ORCPT ); Thu, 24 Mar 2005 13:43:02 -0500 Date: Thu, 24 Mar 2005 10:41:06 -0800 (PST) From: Christoph Lameter To: davidm@hpl.hp.com cc: Andi Kleen , Christoph Lameter , Denis Vlasenko , Dave Hansen , Andrew Morton , Linux Kernel Mailing List , Mel Gorman , linux-ia64@vger.kernel.org, Jens.Maurer@gmx.net Subject: Re: [PATCH] add a clear_pages function to clear pages of higher order In-Reply-To: <16963.2075.713737.485070@napali.hpl.hp.com> Message-ID: References: <200503111008.12134.vda@port.imtp.ilyichevsk.odessa.ua> <200503181154.37414.vda@port.imtp.ilyichevsk.odessa.ua> <20050318192808.GB38053@muc.de> <16963.2075.713737.485070@napali.hpl.hp.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1034 Lines: 31 On Thu, 24 Mar 2005, David Mosberger wrote: > That's definitely the case. See my earlier post on this topic: > > http://www.gelato.unsw.edu.au/linux-ia64/0409/11012.html > > Unfortunately, nobody reported any results for larger machines and/or > more interesting workloads, so the patch is in limbo at this time. > Clearly, if the CPU that's clearing the page is likely to use that > same page soon after, it'd be useful to use temporal stores. So it would be useful to have clear_page -> Temporal. Only zaps one page and clear_pages -> Zaps arbitrary order of page non-temporal Rework the clear_pages patch to do just that? Maybe rename clear_pages clear_pages_nt? prep_zero_page would use a temporal clear for an order 0 page but a nontemporal clear for higher order pages. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/