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SubjectRe: [ANNOUNCE] 3.6.6-rt17
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On Mon, 2012-11-12 at 22:28 +0100, Thomas Gleixner wrote: 
> Dear RT Folks,
>
> I'm pleased to announce the 3.6.6-rt17 release. 3.6.6-rt16 is just a
> not announced update release to 3.6.6.
>
> Changes since 3.6.6-rt16:
>
> * Finally make the NOHZ softirq pending detection work with the new
> softirq scheme.

Well, almost. They gripe when rebooting, but I haven't seen one other
than that. This is 3.6.11-rt23 on a 64 core DL980 I set up to run some
latency tests on.

[ 318.692463] kvm: exiting hardware virtualization
[ 319.568482] Disabling non-boot CPUs ...
[ 319.647819] NOHZ: local_softirq_pending 80
[ 319.876148] NOHZ: local_softirq_pending 202
[ 319.876172] NOHZ: local_softirq_pending 202
[ 319.988912] NOHZ: local_softirq_pending 282
[ 320.097066] NOHZ: local_softirq_pending 202
[ 320.321428] NOHZ: local_softirq_pending 80
[ 320.662601] NOHZ: local_softirq_pending 202
[ 320.662637] NOHZ: local_softirq_pending 202
[ 323.162636] NOHZ: local_softirq_pending 202
[ 323.162649] NOHZ: local_softirq_pending 202
[ 325.217675] Restarting system.

Don't suppose you know why LAZY_PREEMPT would make 3.0-rt explode if you
turn on wakeup_rt tracer do you?

I backported that and your softirq changes to 3.0. New softirq handling
scheme work spiffy there, LAZY_PREEMPT works fine too.. until you turn
tracing on, then it corrupts memory, and makes mushroom cloud.

-Mike






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