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Message-ID: <20170124144353.ehacjtgqduwy23dy@linutronix.de>
Date:   Tue, 24 Jan 2017 15:43:54 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        tglx@...utronix.de
Subject: Re: [PATCH] kernel/sched/rt: Add a rescheduling point

On 2017-01-24 15:40:06 [+0100], To Peter Zijlstra wrote:
> Since the change in commit fd7a4bed1835 ("sched, rt: Convert
> switched_{from, to}_rt() / prio_changed_rt() to balance callbacks") we
> don't reschedule a task under certain circumstances:

|switched_to_dl()
|{
|…
|         if (rq->curr != p) {
| #ifdef CONFIG_SMP
|                 if (tsk_nr_cpus_allowed(p) > 1 && rq->dl.overloaded)
|                         queue_push_tasks(rq);
| #else
|                 if (dl_task(rq->curr))
|                         check_preempt_curr_dl(rq, p, 0);
|                 else
|                         resched_curr(rq);
| #endif
|         }
| }

This looks like it asks for a similar change.

Sebastian

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