Re: [B.A.T.M.A.N.] [PATCH v2 6/7] batman-adv: ELP - use tp meter to estimate the throughput if otherwise not available

[Marek Lindner <mareklindner@neomailbox.ch>]

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On Monday, 21 May 2018 22:43:04 HKT Linus Lüssing wrote:
> On Fri, May 18, 2018 at 09:47:53AM +0800, Marek Lindner wrote:
> > +fallback_throughput:
> > +       last_tp_run_jiffies = jiffies - neigh->bat_v.last_tp_meter_run;
> > +       last_tp_run_msecs = jiffies_to_msecs(last_tp_run_jiffies);
> > +
> > +       /* check the tp_meter_running flag before checking the timestamp
> > to
> > +        * avoid a race condition where a new tp meter session is
> > scheduled
> > +        * right after the previous tp meter session has completed
> > +        */
> > +       if (!neigh->bat_v.tp_meter_running &&
> > +           last_tp_run_msecs > BATADV_ELP_TP_RUN_INTERVAL)
> > +               batadv_v_elp_tp_start(neigh);
> > +
> > +       /* discard too old tp test results */
> > +       if (last_tp_run_msecs > 2 * BATADV_ELP_TP_RUN_INTERVAL)
> > +               neigh->bat_v.tp_meter_throughput = 0;
> > +
> 
> So far we were either using time_before(), time_after_eq() or our
> own wrapper batadv_has_timed_out(). Would it make sense to use
> some of these here, too?

Good point. That changes has been staged for v3.

Cheers,
Marek


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