Re: frequent lockups in 3.18rc4

[Peter Zijlstra]

On Fri, Dec 19, 2014 at 11:15:21AM -0800, Linus Torvalds wrote:

>      sched: RT throttling activated

> 
> And after RT throttling, it's random (not even always trinity), but
> that's probably because the watchdog thread doesn't run reliably any
> more.

So if we want to shoot that RT throttling in the head you can do:

echo -1 > /proc/sys/kernel/sched_rt_runtime_us

That should completely disable that stuff, of course at that point a
run-away RR/FIFO thread will hog your cpu indefinitely.
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