From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 11 Oct 1999 13:57:50 -0400 (EDT) From: James Simmons Subject: Re: MMIO regions In-Reply-To: <14338.6581.988257.647691@dukat.scot.redhat.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: "Stephen C. Tweedie" Cc: Linux MM List-ID: > You seem to be looking for a solution which doesn't exist, though. :) Well my next experiment is RTLinux with acceleration. From what I have been learning SGI kernel has a special schedular for its graphics to ensure hard real time performace. I want to see how much of a impact RTLinux wil have with acceleration. > It is an unfortunate, but true, fact that the broken video hardware > doesn't let you provide memory mapped access which is (a) fast, (b) > totally safe, and (c) functional. Choose which of a, b and c you are > willing to sacrifice and then we can look for solutions. DRI sacrifices > (b), for example, by making the locking cooperative rather than > compulsory. The basic unaccelerated fbcon sacrifices (c). Using VM > protection would sacrifice (a). It's not the ideal choice, sadly. Well I see SGI uses usemsa which is its version of flocking. If SGI does it then its the right way :) Yes I think SGI hardware is teh greatest in the world. -- 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/