From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 5 Apr 2007 05:57:41 +0200 From: Nick Piggin Subject: Re: [RFC] Free up page->private for compound pages Message-ID: <20070405035741.GH11192@wotan.suse.de> References: <20070405033648.GG11192@wotan.suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: linux-mm@kvack.org, dgc@sgi.com List-ID: On Wed, Apr 04, 2007 at 08:38:52PM -0700, Christoph Lameter wrote: > On Thu, 5 Apr 2007, Nick Piggin wrote: > > > On Wed, Apr 04, 2007 at 08:19:22PM -0700, Christoph Lameter wrote: > > > If we add a new flag so that we can distinguish between the > > > first page and the tail pages then we can avoid to use page->private > > > in the first page of a compound page. page->private == page for the first > > > page, so there is no real information in there. > > > > Couldn't you use something like PageActive for the head page instead of > > taking up a new flag, seeing as we don't put compound pages on the LRU? > > We could set up an alias for now? Yeah, definitely use an alias. -- 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