Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752523Ab0LWKHn (ORCPT ); Thu, 23 Dec 2010 05:07:43 -0500 Received: from caramon.arm.linux.org.uk ([78.32.30.218]:48449 "EHLO caramon.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752327Ab0LWKHm (ORCPT ); Thu, 23 Dec 2010 05:07:42 -0500 Date: Thu, 23 Dec 2010 10:06:42 +0000 From: Russell King - ARM Linux To: Kyungmin Park Cc: Michal Nazarewicz , linux-arm-kernel@lists.infradead.org, Daniel Walker , Johan MOSSBERG , Mel Gorman , linux-kernel@vger.kernel.org, Michal Nazarewicz , linux-mm@kvack.org, Ankita Garg , Andrew Morton , linux-media@vger.kernel.org, KAMEZAWA Hiroyuki , Marek Szyprowski Subject: Re: [PATCHv8 00/12] Contiguous Memory Allocator Message-ID: <20101223100642.GD3636@n2100.arm.linux.org.uk> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 890 Lines: 20 On Thu, Dec 23, 2010 at 06:30:57PM +0900, Kyungmin Park wrote: > Hi Andrew, > > any comments? what's the next step to merge it for 2.6.38 kernel. we > want to use this feature at mainline kernel. Has anyone addressed my issue with it that this is wide-open for abuse by allocating large chunks of memory, and then remapping them in some way with different attributes, thereby violating the ARM architecture specification? In other words, do we _actually_ have a use for this which doesn't involve doing something like allocating 32MB of memory from it, remapping it so that it's DMA coherent, and then performing DMA on the resulting buffer? -- 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/