Messages in this thread | | | Subject | Re: Softirq priority inversion from "softirq: reduce latencies" | From | Mike Galbraith <> | Date | Mon, 07 Mar 2016 18:06:30 +0100 |
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On Mon, 2016-03-07 at 16:31 +0100, Sebastian Andrzej Siewior wrote: > On 02/29/2016 05:58 AM, Mike Galbraith wrote: > > WRT -rt: if dma tasklets really do have hard (ish) constraints, -rt > > recently "broke" in the same way.. of all softirqs which are deferred > > to kthread context, due to a recent change, only timer/hrtimer are > > executed at realtime priority by default. > > no. All softirqs are invoked in the context of the current process that > triggerd the softirq invocation. If NAPI goes on for too long (or other > softirq can't be executed in this context) it will continue in the > ksoftirqd. And this threads runs at a normal priority like it does in > mainline. > I adjusted it with mainline.
Yeah, that's what I said, the ksoftirqd case became the same in -rt.
-Mike
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