On Wed, Jul 20, 2016 at 04:28:40PM -0700, Kristian Høgsberg wrote: > Why is this useful if only root can use it? > > When performing driver testing, one factor we want to test is how we > > handle a foreign fence that is never signaled. We can wait on that fence > > indefinitely, in which case the driver appears hung, or we can take some > > remedial action (with risks regarding the state of any shared content). > > Whatever the action choosen by the driver, in order to perform the test > > we want to disable the safety feature of vgem fence (which is then used > > to test implicit dma-buf fencing). This is regarded as a highly > > dangerous feature and so hidden behind an expert config option and only > > available to root when enabled. -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
