From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: Radeon DRM dom0 issues Date: Fri, 24 Jan 2014 09:49:38 -0500 Message-ID: <20140124144938.GD12946@phenom.dumpdata.com> References: <20140120151436.GA19918@andromeda.dapyr.net> <20140120153827.GA24989@phenom.dumpdata.com> <20140121215905.GC6363@phenom.dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Michael D Labriola Cc: Konrad Rzeszutek Wilk , michael.d.labriola@gmail.com, xen-devel-bounces@lists.xen.org, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On Thu, Jan 23, 2014 at 11:54:37AM -0500, Michael D Labriola wrote: > xen-devel-bounces@lists.xen.org wrote on 01/21/2014 04:59:05 PM: > > > From: Konrad Rzeszutek Wilk > > To: Michael D Labriola , > > Cc: Konrad Rzeszutek Wilk , > > michael.d.labriola@gmail.com, xen-devel@lists.xen.org > > Date: 01/21/2014 04:59 PM > > Subject: Re: [Xen-devel] Radeon DRM dom0 issues > > Sent by: xen-devel-bounces@lists.xen.org > > > > On Mon, Jan 20, 2014 at 03:15:24PM -0500, Michael D Labriola wrote: > > > Konrad Rzeszutek Wilk wrote on 01/20/2014 > > > 10:38:27 AM: > > > > > > > From: Konrad Rzeszutek Wilk > > > > To: Michael D Labriola , > > > > Cc: Konrad Rzeszutek Wilk , > > > > michael.d.labriola@gmail.com, xen-devel@lists.xen.org > > > > Date: 01/20/2014 10:38 AM > > > > Subject: Re: [Xen-devel] Radeon DRM dom0 issues > > > > > > > > On Mon, Jan 20, 2014 at 10:26:22AM -0500, Michael D Labriola wrote: > > > > > Konrad Rzeszutek Wilk wrote on 01/20/2014 > 10:14:36 > > > AM: > > > > > > > > > > > From: Konrad Rzeszutek Wilk > > > > > > To: Michael D Labriola , > > > > > > Cc: xen-devel@lists.xen.org, michael.d.labriola@gmail.com > > > > > > Date: 01/20/2014 10:14 AM > > > > > > Subject: Re: [Xen-devel] Radeon DRM dom0 issues > > > > > > > > > > > > On Mon, Jan 20, 2014 at 09:58:32AM -0500, Michael D Labriola > wrote: > > > > > > > Anyone here running a dom0 w/ Radeon DRM? I'm having > consistent > > > > > crashes > > > > > > > with multiple older R600 series (HD 6470 and HD 6570) and > unusably > > > > > > > > slow > > > > > > > graphics with a newer HD7000 (can see each line refresh > > > indiviually on > > > > > > > > > > > > radeonfb tty). All 3 systems seem to work fine bare metal. > > > > > > > > > > > > I hadn't been using DRM, just Xserver. Is that what you mean? > > > > > > > > > > The R600 problems happen when in X, using OpenGL, on my dom0. The > > > > > > RadeonSI sluggishness is when using the KMS framebuffer device for > a > > > plain > > > > > text console login. > > > > > > > > So sluggish is probably due to the PAT not being enabled. This patch > > > > should be applied: > > > > > > > > lkml.org/lkml/2011/11/8/406 > > > > > > > > (or http://marc.info/?l=linux-kernel&m=132888833209874&w=2) > > > > > > > > and these two reverted: > > > > > > > > "xen/pat: Disable PAT support for now." > > > > "xen/pat: Disable PAT using pat_enabled value." > > > > > > > > Which is to say do: > > > > > > > > git revert c79c49826270b8b0061b2fca840fc3f013c8a78a > > > > git revert 8eaffa67b43e99ae581622c5133e20b0f48bcef1 > > > > > > Thanks! I cherry-picked that patch out of your testing tree, reverted > > > > those 2 commits, recompiled and installed. Definitely fixed the HD > 7000 > > > sluggishness and appears to have fixed the R600 crashes (although it's > > > > only been running a few hours). > > > > > > How come that patch didn't get into mainline? It looks pretty > innocuous > > > to me... > > > > the x86 maintainers wanted a different route. And I hadn't had > > the chance nor time to implement it. > > I see. Well, I've got a handful of boxes in my lab that need that patch > to be usable. If you do come up with a more mainline-able solution, I'd > gladly test it for you. ;-) Thank you! > > Thanks again, by the way. > > --- > Michael D Labriola > Electric Boat > mlabriol@gdeb.com > 401-848-8871 (desk) > 401-848-8513 (lab) > 401-316-9844 (cell) > > > > > >