From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 22 Sep 2006 09:35:13 -0700 (PDT) From: Christoph Lameter Subject: Re: [RFC] Initial alpha-0 for new page allocator API In-Reply-To: <200609220817.59801.ak@suse.de> Message-ID: References: <200609220817.59801.ak@suse.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Andi Kleen Cc: Martin Bligh , akpm@google.com, linux-kernel@vger.kernel.org, Christoph Hellwig , James Bottomley , linux-mm@kvack.org List-ID: On Fri, 22 Sep 2006, Andi Kleen wrote: > On Friday 22 September 2006 06:02, Christoph Lameter wrote: > > We have repeatedly discussed the problems of devices having varying > > address range requirements for doing DMA. > > We already have such an API. dma_alloc_coherent(). Device drivers > are not supposed to mess with GFP_DMA* directly anymore for quite > some time. Device drivers need to be able to indicate ranges of addresses that may be different from ZONE_DMA. This is an attempt to come up with a future scheme that does no longer rely on device drivers referring to zoies. > > We would like for the device > > drivers to have the ability to specify exactly which address range is > > allowed. > > I actually have my doubts it is a good idea to add that now. The devices > with weird requirements are steadily going away Hmm.... Martin? -- 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