From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261943AbVF0I24 (ORCPT ); Mon, 27 Jun 2005 04:28:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261923AbVF0I24 (ORCPT ); Mon, 27 Jun 2005 04:28:56 -0400 Received: from smtp203.mail.sc5.yahoo.com ([216.136.129.93]:52138 "HELO smtp203.mail.sc5.yahoo.com") by vger.kernel.org with SMTP id S261943AbVF0I2u (ORCPT ); Mon, 27 Jun 2005 04:28:50 -0400 Message-ID: <42BFB8BE.20903@yahoo.com.au> Date: Mon, 27 Jun 2005 18:28:46 +1000 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.6) Gecko/20050324 Debian/1.7.6-1 X-Accept-Language: en MIME-Version: 1.0 To: Andrew Morton CC: linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [rfc] lockless pagecache References: <42BF9CD1.2030102@yahoo.com.au> <20050627004624.53f0415e.akpm@osdl.org> <42BFB287.5060104@yahoo.com.au> <20050627011539.28793896.akpm@osdl.org> In-Reply-To: <20050627011539.28793896.akpm@osdl.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andrew Morton wrote: > Nick Piggin wrote: > >>Also, the memory usage regression cases that fault ahead brings makes it >> a bit contentious. > > > faultahead consumes no more memory: if the page is present then point a pte > at it. It'll make reclaim work a bit harder in some situations. > Oh OK we'll call that faultahead and Christoph's thing prefault then. I suspect it may still be a net loss for those that are running into tree_lock contention, but we'll see. -- SUSE Labs, Novell Inc. Send instant messages to your online friends http://au.messenger.yahoo.com