Re: [v2 PATCH 4/4] timers: logic to enable timer migration.

[Arun R Bharadwaj <arun@linux.vnet.ibm.com>]

* Daniel Walker <dwalker@fifo99.com> [2009-03-04 08:33:09]:

> On Wed, 2009-03-04 at 17:49 +0530, Arun R Bharadwaj wrote:
> > @@ -649,6 +650,16 @@ __mod_timer(struct timer_list *timer, un
> >  
> >         new_base = __get_cpu_var(tvec_bases);
> >  
> > +       current_cpu = smp_processor_id();
> > +       preferred_cpu = get_nohz_load_balancer();
> > +       if (enable_timer_migration && !tbase_get_pinned(timer->base)
> > &&
> > +                       idle_cpu(current_cpu) && preferred_cpu != -1)
> > {
> > +               new_base = per_cpu(tvec_bases, preferred_cpu);
> > +               timer_set_base(timer, new_base);
> > +               timer->expires = expires;
> > +               internal_add_timer(new_base, timer);
> > +               goto out_unlock;
> > +       }
> 
> Are you sure this compiles w/ CONFIG_SMP=n ? It looks like
> enable_timer_migration wouldn't exist in that case, but the chunks your
> adding in the timer code are still using it.
> 
> Daniel
>

Hi Daniel,

Thanks for pointing this out. I'll clean this up in my next iteration.

--arun