From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ben Widawsky <ben@bwidawsk.net>
Subject: Re: [PATCH 12/12] drm/i915: No contexts without ppgtt
Date: Wed, 24 Apr 2013 09:39:23 -0700
Message-ID: <20130424163923.GB7077@bwidawsk.net>
References: <1366784140-2670-1-git-send-email-ben@bwidawsk.net>
	<1366784140-2670-13-git-send-email-ben@bwidawsk.net>
	<20130424100612.GF11689@cantiga.alporthouse.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org>
Received: from shiva.localdomain (unknown [209.20.75.48])
	by gabe.freedesktop.org (Postfix) with ESMTP id C75E6E5C67
	for <intel-gfx@lists.freedesktop.org>;
	Wed, 24 Apr 2013 09:36:55 -0700 (PDT)
Content-Disposition: inline
In-Reply-To: <20130424100612.GF11689@cantiga.alporthouse.com>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/intel-gfx>,
	<mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://lists.freedesktop.org/archives/intel-gfx>
List-Post: <mailto:intel-gfx@lists.freedesktop.org>
List-Help: <mailto:intel-gfx-request@lists.freedesktop.org?subject=help>
List-Subscribe: <http://lists.freedesktop.org/mailman/listinfo/intel-gfx>,
	<mailto:intel-gfx-request@lists.freedesktop.org?subject=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: Chris Wilson <chris@chris-wilson.co.uk>, Intel GFX <intel-gfx@lists.freedesktop.org>
List-Id: intel-gfx@lists.freedesktop.org

On Wed, Apr 24, 2013 at 11:06:12AM +0100, Chris Wilson wrote:
> On Tue, Apr 23, 2013 at 11:15:40PM -0700, Ben Widawsky wrote:
> > Going forward, every context will have its own address space. So rip off
> > the band aid now. If contexts fail, don't do ppgtt, and vice versa.
> > 
> > Similarly to the last patch, this is somewhat wasteful of PPGTT address
> > space with contexts, since we're not actually utilizing the new PPGTT.
> 
> What strategy do we have for isolating bugs between ctx and ppggt? I'd
> like to be able disable each of them independently and together.
> -Chris

None.

Up through the end of this series we have the ability to turn off:
PPGTT or Contexts & PPGTT.

Given our history, I think that probably concerns you more than PPGTT. I
don't know how to make you feel better.AFAIK, Mesa plans to become
dependent on contexts anyway, so having a way of backing out of that,
even for debug, seems to be of limited use to me.

> 
> -- 
> Chris Wilson, Intel Open Source Technology Centre

-- 
Ben Widawsky, Intel Open Source Technology Center