From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751239AbWDUTId (ORCPT ); Fri, 21 Apr 2006 15:08:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751261AbWDUTId (ORCPT ); Fri, 21 Apr 2006 15:08:33 -0400 Received: from canuck.infradead.org ([205.233.218.70]:22940 "EHLO canuck.infradead.org") by vger.kernel.org with ESMTP id S1751239AbWDUTIc (ORCPT ); Fri, 21 Apr 2006 15:08:32 -0400 Subject: Re: [PATCH] Shrink rbtree From: David Woodhouse To: Nick Piggin Cc: akpm@osdl.org, andrea@suse.de, linux-kernel@vger.kernel.org In-Reply-To: <4448D8BF.9040601@yahoo.com.au> References: <1145623663.11909.139.camel@pmac.infradead.org> <4448D8BF.9040601@yahoo.com.au> Content-Type: text/plain Date: Fri, 21 Apr 2006 20:08:23 +0100 Message-Id: <1145646503.11909.222.camel@pmac.infradead.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by canuck.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2006-04-21 at 23:06 +1000, Nick Piggin wrote: > How do we know the pointers are always going to be aligned? IIRC > struct address_space needed to be explicitly aligned when doing > this trick in page->mapping because some platform byte aligned it. Really? I've been doing this kind of trick with the jffs2_raw_node_ref for years. We always allocate sufficiently aligned objects. -- dwmw2