On Tue, Jul 22, 2014 at 12:52:43PM +0300, Oded Gabbay wrote: > On 22/07/14 12:21, Daniel Vetter wrote: > >On Tue, Jul 22, 2014 at 10:19 AM, Oded Gabbay <oded.gabbay@xxxxxxx> wrote: > >>>Exactly, just prevent userspace from submitting more. And if you have > >>>misbehaving userspace that submits too much, reset the gpu and tell it > >>>that you're sorry but won't schedule any more work. > >> > >>I'm not sure how you intend to know if a userspace misbehaves or not. Can > >>you elaborate ? > > > >Well that's mostly policy, currently in i915 we only have a check for > >hangs, and if userspace hangs a bit too often then we stop it. I guess > >you can do that with the queue unmapping you've describe in reply to > >Jerome's mail. > >-Daniel > > > What do you mean by hang ? Like the tdr mechanism in Windows (checks if a > gpu job takes more than 2 seconds, I think, and if so, terminates the job). Essentially yes. But we also have some hw features to kill jobs quicker, e.g. for media workloads. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>