Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265388AbVBDRC5 (ORCPT ); Fri, 4 Feb 2005 12:02:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266221AbVBDRC4 (ORCPT ); Fri, 4 Feb 2005 12:02:56 -0500 Received: from omx3-ext.sgi.com ([192.48.171.20]:37836 "EHLO omx3.sgi.com") by vger.kernel.org with ESMTP id S265273AbVBDRCu (ORCPT ); Fri, 4 Feb 2005 12:02:50 -0500 Date: Fri, 4 Feb 2005 09:02:10 -0800 (PST) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: Paul Mackerras 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: <16899.15980.791820.132469@cargo.ozlabs.ibm.com> Message-ID: 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> 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: 629 Lines: 15 On Fri, 4 Feb 2005, Paul Mackerras wrote: > > Yes but its a short burst that only occurs very infrequestly and it takes > > It occurs just as often as we clear pages in the page fault handler. > We aren't clearing any fewer pages by prezeroing, we are just clearing > them a bit earlier. scrubd clears pages of orders 7-4 by default. That means 2^4 to 2^7 pages are cleared at once. - 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/