Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263605AbVBDXT3 (ORCPT ); Fri, 4 Feb 2005 18:19:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266342AbVBDW7N (ORCPT ); Fri, 4 Feb 2005 17:59:13 -0500 Received: from ozlabs.org ([203.10.76.45]:49320 "EHLO ozlabs.org") by vger.kernel.org with ESMTP id S264425AbVBDW0E (ORCPT ); Fri, 4 Feb 2005 17:26:04 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <16899.63089.492768.89353@cargo.ozlabs.ibm.com> Date: Sat, 5 Feb 2005 09:25:53 +1100 From: Paul Mackerras To: Christoph Lameter Cc: Rik van Riel , Marcelo Tosatti , David Woodhouse , linux-mm@kvack.org, linux-kernel@vger.kernel.org, akpm@osdl.org Subject: Re: A scrub daemon (prezeroing) In-Reply-To: References: <1106828124.19262.45.camel@hades.cambridge.redhat.com> <20050202153256.GA19615@logos.cnet> <20050202163110.GB23132@logos.cnet> <16898.46622.108835.631425@cargo.ozlabs.ibm.com> <16899.2175.599702.827882@cargo.ozlabs.ibm.com> <16899.15980.791820.132469@cargo.ozlabs.ibm.com> X-Mailer: VM 7.19 under Emacs 21.3.1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 519 Lines: 15 Christoph Lameter writes: > scrubd clears pages of orders 7-4 by default. That means 2^4 to 2^7 > pages are cleared at once. So are you saying that clearing an order 4 page will take measurably less time than clearing 16 order 0 pages? I find that hard to believe. Paul. - 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/