From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with ESMTP id EE11E6B006A for ; Mon, 11 Jan 2010 02:40:44 -0500 (EST) Received: from sesr04.transmode.se (sesr04.transmode.se [192.168.201.15]) by gw1.transmode.se (Postfix) with ESMTP id D1C09650003 for ; Mon, 11 Jan 2010 08:40:40 +0100 (CET) In-Reply-To: References: Subject: Re: _PAGE_ACCESSED question Message-ID: From: Joakim Tjernlund Date: Mon, 11 Jan 2010 08:39:34 +0100 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Sender: owner-linux-mm@kvack.org Cc: linux-mm@kvack.org List-ID: Try asking the below question again: Joakim Tjernlund/Transmode wrote on 08/01/2010 18:51:44: > > I hacking on 8xx ppc TLB handlers and I wonder about the _PAGE_ACCESSED > pte flag. Normally one set this flag in the TLB handler iff PRESENT is also set. > I know ACCESSED is used by SWAP but what more uses it? > I wonder because most embedded systems does not have SWAP so it is > tempting to skip updating ACCESSED in the TLB handler to save a few insn's > and a pte write when swap is disabled. > > I also wonder if it allowed to clear the ACCESSED flag > when PRESENT is also cleared. > > Jocke -- 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