Quoting Chris Wilson (2018-02-22 14:22:29) > Sometimes we need to boost the priority of an in-flight request, which > may lead to the situation where the second submission port then contains > a higher priority context than the first and so we need to inject a > preemption event. To do so we must always check inside > execlists_dequeue() whether there is a priority inversion between the > ports themselves as well as the head of the priority sorted queue, and we > cannot just skip dequeuing if the queue is empty. > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Cc: Michał Winiarski <michal.winiarski@xxxxxxxxx> > Cc: Michel Thierry <michel.thierry@xxxxxxxxx> > Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx> > Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> Note this probably merits a Fixes tag. Outside of igt causing priority inversion between GPU hogs, is it a big enough problem to deserve sending to stable@? -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
