On Thu, 12 Sep 2013, Daniel Vetter wrote: > On Thu, Sep 12, 2013 at 6:22 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > If 'sane' userspace is never supposed to do this, then only insane > > userspace is going to hurt from this and that's a GOOD (tm) thing, > > right? ;-) > > Afaik sane userspace doesn't hit the _deadlock_ (or lifelock if we > have the set_need_resched in there). drm/i915 is a bit different since > we have just one lock, and so the same design would actually deadlock > even for sane userspace. But hitting contention there and yielding is > somewhat expected. Obviously shouldn't happen too often since it'll > hurt performance, with either blocking or the yield spinning loop. So this is actually a non priviledged DoS interface, right? Thanks, tglx _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
