From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752659Ab0HZGzS (ORCPT ); Thu, 26 Aug 2010 02:55:18 -0400 Received: from sh.osrg.net ([192.16.179.4]:52244 "EHLO sh.osrg.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750874Ab0HZGzQ (ORCPT ); Thu, 26 Aug 2010 02:55:16 -0400 Date: Thu, 26 Aug 2010 15:55:02 +0900 To: x0095840@ti.com Cc: linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org, ohad@wizery.com, hiroshi.doyu@nokia.com, ameya.palande@nokia.com, felipe.contreras@nokia.com Subject: Re: [PATCH 8/9] dspbridge: add map support for big buffers From: FUJITA Tomonori In-Reply-To: <1277943660-4112-9-git-send-email-x0095840@ti.com> References: <1277943660-4112-7-git-send-email-x0095840@ti.com> <1277943660-4112-8-git-send-email-x0095840@ti.com> <1277943660-4112-9-git-send-email-x0095840@ti.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: <20100826155416J.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, 26 Aug 2010 15:55:04 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 30 Jun 2010 19:20:59 -0500 Fernando Guzman Lugo wrote: > due to a restriction in scatter gather lists, it can > not be created a list for a buffer bigger than 1MB. > This patch is spliting big mappings into 1MB mappings. I don't read the whole thread but the above description is incorrect. Why can't you use scatter gather chaining? You can create a scatter list for a buffer larger than 1MB.