From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frans Pop Subject: Re: fb layer & ioremap_wc Date: Mon, 5 May 2008 21:30:14 +0200 Message-ID: <200805052130.14939.elendil@planet.nl> References: <200805022122.03576.elendil@planet.nl> <200805052059.01535.elendil@planet.nl> <200805051204.49135.jesse.barnes@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1Jt6OM-0006Z2-7o for linux-fbdev-devel@lists.sourceforge.net; Mon, 05 May 2008 12:30:30 -0700 Received: from hpsmtp-eml17.kpnxchange.com ([213.75.38.117]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1Jt6OK-0000Df-M8 for linux-fbdev-devel@lists.sourceforge.net; Mon, 05 May 2008 12:30:30 -0700 In-Reply-To: <200805051204.49135.jesse.barnes@intel.com> Content-Disposition: inline List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-fbdev-devel-bounces@lists.sourceforge.net Errors-To: linux-fbdev-devel-bounces@lists.sourceforge.net To: linux-fbdev-devel@lists.sourceforge.net FYI This is from a thread started on lkml about a regression with 2.6.26-rc1 where artifacts are shown when X is exited if X86_PAT is enabled. The full thread can be seen here: http://www.gossamer-threads.com/lists/linux/kernel/914812?do=post_view_threaded The most relevant part starts here: http://www.gossamer-threads.com/lists/linux/kernel/915956?do=post_view_threaded On Monday 05 May 2008, Jesse Barnes wrote: > On Monday, May 05, 2008 11:59 am Frans Pop wrote: > > On Monday 05 May 2008, you wrote: > > > On Monday, May 05, 2008 10:32 am Frans Pop wrote: > > > > I suspect it could be vesafb/fbcon related instead. Normally I boot > > > > my system with 'quiet vga=791', i.e. with vesafb. I then see the > > > > artifacts. > > > > > > > > When I boot with 'video=vfb:off', I do _not_ get the artifacts when > > > > X exits. > > > > > > Ahhh, I missed that part of your config. That could definitely have > > > an effect on things... You'll probably want something like the > > > attached > > > > Not sure what to make of this. > > With your patch I still get the artifacts, but they are displayed a lot > > shorter. I get only a flash instead of a-2 seconds. > > Hm, so I guess some other user is still using UC on the region. [Note to > fb list: the patch just made vesafb use ioremap_wc instead of ioremap). > > > > (there are other places in the fb layer that want similar treatment, > > > iirc, maybe fb_pgprotect?). > > > > Do you want to try a more complete review/patch or should this be > > punted over to the framebuffer folks? > > Yeah, those bits have changed since I last looked at them, hopefully the > fb guys can help. ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone