From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 25 Sep 2000 12:31:38 -0500 (CDT) From: Oliver Xymoron Subject: Re: the new VMt In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Alan Cox Cc: Alexander Viro , Ingo Molnar , Andrea Arcangeli , Marcelo Tosatti , Linus Torvalds , Rik van Riel , Roger Larsson , MM mailing list , linux-kernel@vger.kernel.org List-ID: On Mon, 25 Sep 2000, Alan Cox wrote: > > > > Stupidity has no limits... > > > > > > Unfortunately its frequently wired into the hardware to save a few cents on > > > scatter gather logic. > > > > Since when hardware folks became exempt from the rule above? 128K is > > almost tolerable, there were requests for 64 _mega_bytes... > > Most cheap ass PCI hardware is built on the basis you can do linear 4Mb > allocations. There is a reason for this. You can do that 4Mb allocation on > NT or Windows 9x Sure about that? It's been a while, but I seem to recall NT enforcing a scatter-gather framework on all drivers because it only gave them virtual allocations. For the cheaper cards, the s-g was done by software issuing single span requests to the card. -- "Love the dolphins," she advised him. "Write by W.A.S.T.E.." -- 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.eu.org/Linux-MM/