From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 31 Aug 1999 13:10:46 -0400 (EDT) From: James Simmons Subject: Re: accel handling In-Reply-To: <14283.53075.795656.291744@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: Marcus Sundberg , Vladimir Dergachev , linux-mm@kvack.org List-ID: > Hi, > > On Tue, 31 Aug 1999 12:55:26 +0200, Marcus Sundberg > said: > > > But by only re-mapping the framebuffer on demand as Stephen said you > > can avoid repeatedly un-mapping the framebuffer for processes/threads > > that doesn't use it. > > Yes. The biggest problem is that the VM currently has no support for > demand-paging of an entire framebuffer region, and taking a separate > page fault to fault back the mapping of every page in the framebuffer > would be too slow. As long as we can switch the entire framebuffer in > and out of the mapping rapidly, things aren't too bad. > So if this is the problem could we write a special routine that optimizes this. What if we gave the VM support for demand paging of an entire framebuffer region. -- 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/