Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757512AbYJHToZ (ORCPT ); Wed, 8 Oct 2008 15:44:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756663AbYJHTli (ORCPT ); Wed, 8 Oct 2008 15:41:38 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:54492 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755826AbYJHTlh (ORCPT ); Wed, 8 Oct 2008 15:41:37 -0400 Message-ID: <48ED0B68.2060001@linux-foundation.org> Date: Wed, 08 Oct 2008 14:35:04 -0500 From: Christoph Lameter User-Agent: Thunderbird 2.0.0.17 (Windows/20080914) MIME-Version: 1.0 To: Andy Whitcroft CC: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Jon Tollefson , Mel Gorman , Nick Piggin Subject: Re: [PATCH 1/1] hugetlbfs: handle pages higher order than MAX_ORDER References: <1223458431-12640-1-git-send-email-apw@shadowen.org> <1223458431-12640-2-git-send-email-apw@shadowen.org> <48ECDD37.8050506@linux-foundation.org> <20081008185532.GA13304@brain> In-Reply-To: <20081008185532.GA13304@brain> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 712 Lines: 17 Andy Whitcroft wrote: > With SPARSEMEM turned on and VMEMMAP turned off a valid combination, > we will end up scribbling all over memory which is pretty serious so for > that reason we should handle this case. There are cirtain combinations > of features which require SPARSMEM but preclude VMEMMAP which trigger this. Which configurations are we talking about? 64 bit configs may generally be able to use VMEMMAP since they have lots of virtual address space. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/