From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964993AbWFTIBb (ORCPT ); Tue, 20 Jun 2006 04:01:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964995AbWFTIBb (ORCPT ); Tue, 20 Jun 2006 04:01:31 -0400 Received: from omx1-ext.sgi.com ([192.48.179.11]:10696 "EHLO omx1.americas.sgi.com") by vger.kernel.org with ESMTP id S964993AbWFTIBa (ORCPT ); Tue, 20 Jun 2006 04:01:30 -0400 Message-ID: <4497AB46.4000402@sgi.com> Date: Tue, 20 Jun 2006 10:01:10 +0200 From: Jes Sorensen User-Agent: Thunderbird 1.5 (X11/20060317) MIME-Version: 1.0 To: Robin Holt CC: Andi Kleen , linux-kernel@vger.kernel.org, Nick Piggin , Hugh Dickins , Carsten Otte , bjorn_helgaas@hp.com Subject: Re: [patch] do_no_pfn References: <20060619224952.GA17685@lnx-holt.americas.sgi.com> In-Reply-To: <20060619224952.GA17685@lnx-holt.americas.sgi.com> X-Enigmail-Version: 0.94.0.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Robin Holt wrote: > On Mon, Jun 19, 2006 at 03:06:05PM +0200, Andi Kleen wrote: >> The big question is - why do you have pages without struct page? >> It seems ... wrong. [snip] > Are you saying the for the mspec pages we should extend the vmem_map, > partially populate the regions for the mspec pages, mark those pages as > uncached and reserved and then turn them over to the uncached allocator? > Seems like we have done a lot of extra work to put a struct page behind > a page which requires special handling. Note that Bjorn Helgas has a case where he needs this as well. We could fake the pages by giving them a struct page, but it really makes no point as you say. Cheers, Jes