From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: Getting big areas of memory, in 2.3.x? Date: Thu, 9 Dec 1999 02:28:13 +0000 (GMT) In-Reply-To: <384EFFD3.8DDCEF8D@mandrakesoft.com> from "Jeff Garzik" at Dec 8, 99 08:03:15 pm Content-Type: text Message-Id: From: Alan Cox Sender: owner-linux-mm@kvack.org Return-Path: To: Jeff Garzik Cc: linux-mm@kvack.org, linux-kernel@vger.rutgers.edu List-ID: > What's the best way to get a large region of DMA'able memory for use > with framegrabbers and other greedy drivers? Do you need physically linear memory > > Per a thread on glx-dev, Andi Kleen mentions that the new 2.3.x MM stuff > still doesn't allieviate the need for bigphysarea and similar patches. It helps, however the best answer is to use sane hardware which has scatter gather - eg the bttv frame grabbers grab 1Mb of memory or more, but they grab it as arbitary pages not a linear block. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://humbolt.geo.uu.nl/Linux-MM/