From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Wilson Subject: Re: [PATCH] drm/i915: disable cpu relocs on ilk and earlier Date: Wed, 10 Oct 2012 10:13:03 +0100 Message-ID: References: <1349856400-16502-1-git-send-email-daniel.vetter@ffwll.ch> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id 3AB1DA0A68 for ; Wed, 10 Oct 2012 02:13:13 -0700 (PDT) In-Reply-To: <1349856400-16502-1-git-send-email-daniel.vetter@ffwll.ch> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Intel Graphics Development Cc: Daniel Vetter , stable@vger.kernel.org List-Id: intel-gfx@lists.freedesktop.org On Wed, 10 Oct 2012 10:06:40 +0200, Daniel Vetter wrote: > They seem to be implicated in render corruptions. And up to now no one > really seems to understand the issue, so let's just disable them for > now. Most of the machines exhibiting this issue have only a 128 gtt > mmio window, so increased pressure on the mappable part (and so higher > chance for cpu relocs) seems to be the key. > > Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=852210 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=55112 > Cc: Dave Airlie > Cc: stable@vger.kernel.org > [Note for stable, there's a minor conflict in the context since we've > tuned cpu relocs on gen6+ a bit in 3.7.] > Signed-off-by: Daniel Vetter My only query is that the fdo reporter said that "kernel 3.6 + drm-next" didn't trigger the error. So I'd like some confirmation that this patch is indeed needed for 3.7, but meh. (If only because that might give some insight as to what the root cause is.) Acked-by: Chris Wilson -Chris -- Chris Wilson, Intel Open Source Technology Centre