Messages in this thread | ![/](/images/icornerl.gif) | | Subject | Re: [PATCH RFC/RFT] sched/fair: Improve the behavior of sync flag | From | Mike Galbraith <> | Date | Sun, 27 Aug 2017 09:16:36 +0200 |
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On Sat, 2017-08-26 at 23:39 -0700, Joel Fernandes wrote: > > > P.S. to get the most bang for your synchronous buck, you want a > > preemptive wakeup.. but that butts heads with the fair engine. > > > > By preemptive wake up I guess you mean the waker would give up its > time slice and let the wakee use it? That's a cool idea but I agree it > would be against the fair task behavior.
No, I meant a preemption, that being the cheapest switch. Any mucking about with vruntime is a non-starter (NAK bait), making guaranteed preemption a non-starter.
-Mike
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