From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262379AbVAVBVG (ORCPT ); Fri, 21 Jan 2005 20:21:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262358AbVAVBVG (ORCPT ); Fri, 21 Jan 2005 20:21:06 -0500 Received: from scrub.xs4all.nl ([194.109.195.176]:43757 "EHLO scrub.xs4all.nl") by vger.kernel.org with ESMTP id S262342AbVAVBVC (ORCPT ); Fri, 21 Jan 2005 20:21:02 -0500 Date: Sat, 22 Jan 2005 02:20:49 +0100 (CET) From: Roman Zippel X-X-Sender: roman@scrub.home To: Andrew Morton cc: Paul Mackerras , clameter@sgi.com, davem@davemloft.net, hugh@veritas.com, linux-ia64@vger.kernel.org, torvalds@osdl.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: Extend clear_page by an order parameter In-Reply-To: <20050121164353.6f205fbc.akpm@osdl.org> Message-ID: References: <20050108135636.6796419a.davem@davemloft.net> <16881.33367.660452.55933@cargo.ozlabs.ibm.com> <16881.40893.35593.458777@cargo.ozlabs.ibm.com> <20050121164353.6f205fbc.akpm@osdl.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Fri, 21 Jan 2005, Andrew Morton wrote: > Paul Mackerras wrote: > > > > A cluster of 2^n contiguous pages > > isn't one page by any normal definition. > > It is, actually, from the POV of the page allocator. It's a "higher order > page" and is controlled by a struct page*, just like a zero-order page... OTOH we also have alloc_page/alloc_pages. bye, Roman