From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 25 May 2007 11:56:36 -0700 (PDT) From: Christoph Lameter Subject: Re: [patch 0/6] Compound Page Enhancements In-Reply-To: <20070525101411.a95bd2ea.akpm@linux-foundation.org> Message-ID: References: <20070525051716.030494061@sgi.com> <20070524230032.554be39e.akpm@linux-foundation.org> <20070525101411.a95bd2ea.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: linux-mm@kvack.org, Mel Gorman , KAMEZAWA Hiroyuki , William Lee Irwin III List-ID: On Fri, 25 May 2007, Andrew Morton wrote: > > But then PageHead(page) wont work anymore. pagehead->first_page is in use > > for some other purpose. > > That's only because slub came along and screwed it all up. The compound > page management used to be consistent, and simple. Yeah I tried to keep it that way. Had to mess it up with the strange bit checks to get it in. > Specifically: that lockless_freelist afterthought rendered us unable to fix > this mess. The main mess of page->private not being usable was fixed up. Now this can be even cleaner if we had PageTail and PageHead. -- 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