From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Vetter Subject: Re: [PATCH] drm/i915/bdw: Render moot context reset and switch with Execlists Date: Tue, 26 Aug 2014 16:11:53 +0200 Message-ID: <20140826141153.GC15520@phenom.ffwll.local> References: <1406217891-8912-12-git-send-email-thomas.daniel@intel.com> <1408548564-3787-1-git-send-email-thomas.daniel@intel.com> <20140820153605.GE12830@nuc-i3427.alporthouse.com> <20140825203939.GK15520@phenom.ffwll.local> <20140826055947.GA20222@nuc-i3427.alporthouse.com> <53FC919F.3070702@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-wg0-f52.google.com (mail-wg0-f52.google.com [74.125.82.52]) by gabe.freedesktop.org (Postfix) with ESMTP id 8655B6E521 for ; Tue, 26 Aug 2014 07:11:31 -0700 (PDT) Received: by mail-wg0-f52.google.com with SMTP id a1so14490320wgh.23 for ; Tue, 26 Aug 2014 07:11:30 -0700 (PDT) Content-Disposition: inline In-Reply-To: <53FC919F.3070702@linux.intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: "Siluvery, Arun" Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org On Tue, Aug 26, 2014 at 02:54:39PM +0100, Siluvery, Arun wrote: > On 26/08/2014 06:59, Chris Wilson wrote: > >On Mon, Aug 25, 2014 at 10:39:39PM +0200, Daniel Vetter wrote: > >>On Wed, Aug 20, 2014 at 04:36:05PM +0100, Chris Wilson wrote: > >>>On Wed, Aug 20, 2014 at 04:29:24PM +0100, Thomas Daniel wrote: > >>>>These two functions make no sense in an Logical Ring Context & Execlists > >>>>world. > >>>> > >>>>v2: We got rid of lrc_enabled and centralized everything in the sanitized > >>>>i915.enable_execlists instead. > >>>> > >>>>Signed-off-by: Oscar Mateo > >>>> > >>>>v3: Rebased. Corrected a typo in comment for i915_switch_context and > >>>>added a comment that it should not be called in execlist mode. Added > >>>>WARN_ON if i915_switch_context is called in execlist mode. Moved check > >>>>for execlist mode out of i915_switch_context and into callers. Added > >>>>comment in context_reset explaining why nothing is done in execlist > >>>>mode. > >>> > >>>No, this is not the way. The requirement is to reduce the number of > >>>special cases not increase them. These should be evaluated to be no-ops > >>>when execlists is used. > >> > >>I think it's ok-ish for now. Maybe we need to reconsider when we wire up > >>lrc reclaim - which is the real user of the switch_context in gpu_idle. > >>The problem I have though is that I can't parse the subject of the patch, > >>someone please translate that to simplified English for me. I can do the > >>replacement while applying. > > > >No, it is not. execlists is badly designed and this is a further symptom > >of that. > >-Chris > > > Thomas is not available and I am replying on his behalf. > Is the following subject is good for this patch? > > "Don't execute context reset and switch when using Execlists" Yeah, I think that's more parseable by mere mortals^W^W non-native speakers. Pulled in. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch