Hi,
> > in prepare_task_switch(rq, next); interrupts are enabled,
>
> That's a bug. __schedule should not have interrupts enabled.
> What's the back trace of this?
I've also seen this in the past. Interrupts are enabled in
prepare_lock_switch because ARM defines __ARCH_WANT_INTERRUPTS_ON_CTXSW.
IIRC Thomas fixed this for the current -rt release.
Cheers,
Jan
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