Re: [ANNOUNCE] 3.12.6-rt9

Joakim Hernberg
2014-01-22T21:28:01Z

On Mon, 20 Jan 2014 21:17:36 -0500
Steven Rostedt <rostedt@goodmis.org> wrote:

> I happen to have a i7 box to test on, and sure enough, the latest
> 3.12-rt locks up on boot and reverting the
> timers-do-not-raise-softirq-unconditionally.patch, it boots fine.

> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
>
> diff --git a/kernel/timer.c b/kernel/timer.c
> index 46467be..8212c10 100644
> --- a/kernel/timer.c
> +++ b/kernel/timer.c
> @@ -1464,13 +1464,11 @@ void run_local_timers(void)
> raise_softirq(TIMER_SOFTIRQ);
> return;
> }
> - if (!base->active_timers)
> - goto out;
>
> /* Check whether the next pending timer has expired */
> if (time_before_eq(base->next_timer, jiffies))
> raise_softirq(TIMER_SOFTIRQ);
> -out:
> +
> rt_spin_unlock_after_trylock_in_irq(&base->lock);
>
> }

This fixes the problem on my i7-2600k.

--

Joakim