Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1767535AbXEDAj0 (ORCPT ); Thu, 3 May 2007 20:39:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1767544AbXEDAj0 (ORCPT ); Thu, 3 May 2007 20:39:26 -0400 Received: from terminus.zytor.com ([192.83.249.54]:53436 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1767535AbXEDAjZ (ORCPT ); Thu, 3 May 2007 20:39:25 -0400 Message-ID: <463A80A9.7030809@zytor.com> Date: Thu, 03 May 2007 17:39:05 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.0 (X11/20070419) MIME-Version: 1.0 To: Kyle Moffett CC: Jan Engelhardt , Geert Uytterhoeven , Albert Cahalan , "Antonino A. Daplas" , linux-kernel , aeb@cwi.nl Subject: Re: console font limits References: <787b0d920704302109r352e6653wc71a0638cbfbdcce@mail.gmail.com> <1178021516.4372.62.camel@daplas> <46375738.1010007@zytor.com> <787b0d920705010849u52a4d6c3o2f1f800521ad5b95@mail.gmail.com> <787b0d920705022317j485cbe26wc83f071834c53584@mail.gmail.com> <787b0d920705030714k3b290d2csa38a5df63c692d6f@mail.gmail.com> <463A42DF.5030409@zytor.com> In-Reply-To: X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1114 Lines: 23 Kyle Moffett wrote: > > Actually I think the real problem was that "KD_GRAPHICS" got overloaded > to mean "some userspace program is probably poking at the GPU in very > direct ways possibly including /dev/mem". As such it really isn't safe > at all for the kernel to write stuff to the screen in that situation; > you could turn a panic()+reboot-after-30-secs into an unrecoverable hard > PCI bus lockup. IIRC there were at least a couple chipsets which had > that problem with X. If we can implement enough APIs for X to do all of > its stuff from userspace without iopl() or /dev/mem then we could > probably bring back the option for dumping oopses to screen in > KD_GRAPHICS mode, but otherwise it'll just cause more headaches. > It never meant anything *BUT* that, to the best of my knowledge. That was certainly the original meaning of KD_GRAPHICS. -hpa - 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/