On Tue, Feb 21, 2012 at 21:11:07 +0000, Chris Wilson wrote: > On Tue, 21 Feb 2012 12:59:37 -0800, Kenneth Graunke <kenneth at whitecape.org> wrote: > > @@ -1828,6 +1829,9 @@ drm_intel_gem_bo_mrb_exec2(drm_intel_bo *bo, int used, > > execbuf.rsvd1 = 0; > > execbuf.rsvd2 = 0; > > > > + if (getenv("INTEL_DEVID_OVERRIDE")) > > + goto skip_execution; > > I'm not thrilled about calling getenv() for every execbuffer. And what > about the original execbuffer path? I'm not thrilled about allowing the user to modify X server behaviour with an env variable. This is setuid root after all. I guess this also applies to the existing calls to getenv in the dri driver. Cheers, Julien