Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759563Ab0HEAVV (ORCPT ); Wed, 4 Aug 2010 20:21:21 -0400 Received: from sh.osrg.net ([192.16.179.4]:55092 "EHLO sh.osrg.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759522Ab0HEAVS (ORCPT ); Wed, 4 Aug 2010 20:21:18 -0400 Date: Thu, 5 Aug 2010 09:16:26 +0900 To: peter.crosthwaite@petalogix.com Cc: linux-kernel@vger.kernel.org, cl@linux-foundation.org, penberg@cs.helsinki.fi, mpm@selenic.com, michal.simek@petalogix.com, edgar.iglesias@petalogix.com, john.williams@petalogix.com Subject: Re: Using Bootmem for large DMA buffers in the presence of the slab allocator From: FUJITA Tomonori In-Reply-To: References: Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: <20100805091523U.fujita.tomonori@lab.ntt.co.jp> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (sh.osrg.net [192.16.179.4]); Thu, 05 Aug 2010 09:16:28 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 736 Lines: 14 On Wed, 4 Aug 2010 16:07:52 +1000 Peter Crosthwaite wrote: > I am currently developing Kernel code to allocate and reserve a large > (64MB) contiguous buffer for DMA. A buffer needs to be physically continuous (your hardware can't do scatter gather)? If so, as already pointed out, there is no pretty solution for it. There are some drivers that need to do such so the issue has been under discussion: http://marc.info/?l=linux-mm&m=128015343705933&w=2 -- 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/