On Tue, 3 Jul 2018 11:31:20 -0400
Steven Rostedt <[email protected]> wrote:

> On Tue, 3 Jul 2018 17:07:11 +0200
> Juri Lelli <[email protected]> wrote:
> 
> > This got into tip quite recently
> > 
> > ecda2b66e263 ("sched/deadline: Fix missing clock update")
> > 
> > could you please double check that you have that in your stack?
> >   
> 
> Unfortunately, I just tested it out, and it still locks up with this
> patch.
> 

It appears that the below patch fixes the issue for me.

Is this a correct usage?

-- Steve

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index fbfc3f1d368a..90b6e9df79b2 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -2085,6 +2085,8 @@ static int push_dl_task(struct rq *rq)
                goto retry;
        }
 
+       update_rq_clock(later_rq);
+
        deactivate_task(rq, next_task, 0);
        sub_running_bw(&next_task->dl, &rq->dl);
        sub_rq_bw(&next_task->dl, &rq->dl);

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