Re: Normal RCU grace period can be stalled for long because need-resched flags not set?

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On Wed, Jul 3, 2019 at 12:41 PM Joel Fernandes <joel@xxxxxxxxxxxxxxxxx> wrote:
>
> On Wed, Jul 03, 2019 at 11:30:36AM -0400, Steven Rostedt wrote:
> > On Wed, 3 Jul 2019 11:25:20 -0400
> > Joel Fernandes <joel@xxxxxxxxxxxxxxxxx> wrote:
> >
> >
> > > I am sorry if this is not a realistic real-life problem, but more a
> > > "doctor it hurts if I do this" problem as Steven once said ;-)
> > >
> > > I'll keep poking ;-)
> >
> > Hi Joel,
> >
> > Can you also share the tests you are performing as well as any
> > module/code changes you made so that we can duplicate the results?
>
> Sure thing. Below is the diff that I applied to Paul's /dev branch. But I
> believe Linus's tree should have same results.
>
> After applying the diff below, I run it like this:
> tools/testing/selftests/rcutorture/bin/kvm.sh --bootargs rcuperf.pd_test=1 rcuperf.pd_busy_wait=5000 rcuperf.holdout=5 rcuperf.pd_resched=0 --duration 1 --torture rcuperf
>

Sorry the quotes are missing, the command is:
tools/testing/selftests/rcutorture/bin/kvm.sh --bootargs
"rcuperf.pd_test=1 rcuperf.pd_busy_wait=5000 rcuperf.holdout=5
rcuperf.pd_resched=0" --duration 1 --torture rcuperf



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