On (10/24/12 13:11), Paul E. McKenney wrote:
> > > >
> > > > sorry, I meant idle from RCU point of view:
> > > >
> > > > int rcu_is_cpu_idle(void)
> > > > {
> > > > return !rcu_dynticks_nesting;
> > > > }
> > >
> > > Hmmm... This reproduces on UP builds, then?
> >
> > I'll compile UP build (will offlining of N-1 CPUs do the trick?).
>
> Oh -- you quoted the Tiny RCU (CONFIG_SMP=n) variant of rcu_is_cpu_idle(),
sorry, that was just an 'illustration'.
-ss
> so I just thought that you were reproducing on CONFIG_SMP=n. You would
> have to actually rebuild the kernel to get the different version.
>
> But never mind! RCU_USER_QS depends on CONFIG_SMP=y, so my question
> was irrelevant.
>
> Thanx, Paul
>
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