> -----Original Message----- > From: daniel.vet...@ffwll.ch [mailto:daniel.vet...@ffwll.ch] On Behalf Of > Daniel Vetter > Sent: Tuesday, June 17, 2014 11:09 AM > To: Mateo Lozano, Oscar > Cc: Chris Wilson; intel-gfx@lists.freedesktop.org > Subject: Re: [Intel-gfx] [PATCH 51/53] drm/i915/bdw: Document Logical > Rings, LR contexts and Execlists > > On Tue, Jun 17, 2014 at 11:46 AM, Mateo Lozano, Oscar > <oscar.ma...@intel.com> wrote: > > The comment appears in the commit message for " drm/i915/bdw: > Implement context switching (somewhat) ": > > > > v3: Use LRCA[31:12] as hwCtxId[19:0]. This guarantees that the HW > context > > ID we submit to the ELSP is globally unique and != 0 (Bspec requirements > > of the software use-only bits of the Context ID in the Context > > Descriptor > > Format) without the hassle of the previous submission Id construction. > > I've meant a comment as to why reusing ctx->id isn't a good idea since it's > per-file an so not globally unique. Occasionally repeating and stating the > seemingly obvious won't hurt ;-) -Daniel
Ok, I´ll expand the comment describing why the submission Id construction was a very bad idea. _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
