Re: [PATCH 1/3] rv/rtapp/sleep: Make the error more informative for user

[Gabriele Monaco]

On Tue, 2026-05-19 at 17:24 +0200, Nam Cao wrote:
> Gabriele Monaco <gmonaco@xxxxxxxxxx> writes:
> > On Tue, 2026-05-19 at 09:49 +0200, Nam Cao wrote:
> > > The rtapp/sleep monitor detects real-time tasks which go to sleep in an
> > > real-time-unsafe manner. If this happen, the monitor triggers a trace
> > > event
> > > in the sched_wakeup tracepoint's handler.
> > 
> > Ok so here WAKE is no longer tied to the wakeup event but to the end of the
> > task
> > switch.
> > 
> > So what happens if a task was not sleeping but just got preempted? Wouldn't
> > that
> > trigger WAKE (though that isn't a real wakeup) without RT_FRIENDLY_WAKE ?
> 
> The monitor's rule says that when a task sleeps, it will not wake
> without rt-friendly wake. If it "wakes" without initial sleep, it is
> simply ignored.

Right makes sense.

> I can change the name to be SCHEDULE_IN or something like that to make
> it clearer.
> 

Yeah that'd be clearer, or at least a comment stating this somewhere.

Thanks,
Gabriele