On Tue, Jun 4, 2019 at 1:24 PM Koenig, Christian <Christian.Koenig@xxxxxxx> wrote: > > Am 04.06.19 um 12:50 schrieb Michel Dänzer: > > On 2019-05-28 10:03 a.m., Koenig, Christian wrote: > >> I rather think that we should go down the route of completely dropping > >> command submission and buffer allocation through the primary node for > >> non master clients. And then as next step at some point drop support for > >> authentication/flink. > > Keep in mind that even display servers aren't DRM master while their VT > > isn't active, so this might be problematic if a display server needs to > > do some command submission / buffer allocation during that time. > > If I understand it correctly the DRM fd stays master even when the VT is > switched away, it's just not the current master any more. > > So in this case fpriv->is_master stays true, but > drm_is_current_master(fpriv) returns false. > > And yes we mixed that up in amdgpu, i915 and vmwgfx. Somebody should > probably write patches to fix this. master should always be authenticated, so should be able to continue rendering. Well ... except on drivers who do take isolation somewhat serious, but don't have full per-client isolation. Those actually refuse rendering/gpu access for any authenticated client if their corresponding master isn't the current master. But I think only vmwgfx does that. Per-client isolation has taken over anyway, so all a bit moot, at least on modern hw. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
