Hi Paul,
On Thu, Jun 30, 2016 at 6:52 PM, Paul E. McKenney
<paulmck@xxxxxxxxxxxxxxxxxx> wrote:
> On Thu, Jun 30, 2016 at 05:53:42PM +0200, Geert Uytterhoeven wrote:
>> +void rcu_dump_rcu_sched_tree(void)
>> +{
>> + struct rcu_head rh;
>> + unsigned long flags;
>> +
>> + rcu_dump_rcu_node_tree(&rcu_sched_state); /* Initial state. */
>> + local_irq_save(flags);
>> + // call_rcu(&rh, do_nothing_cb);
>> + local_irq_restore(flags);
>> + // schedule_timeout_uninterruptible(5 * HZ); /* Or whatever delay. */
>> + rcu_dump_rcu_node_tree(&rcu_sched_state); /* GP state. */
>> + //synchronize_sched(); /* Probably hangs. */
>> + //rcu_barrier(); /* Drop RCU's references to rh before return. */
>> +}
>>
>> When enabling any of the 4 commented-out lines in rcu_dump_rcu_sched_tree(),
>> it will lock up.
>
> OK, but that includes schedule_timeout_uninterruptible(5 * HZ), right?
Yes it does.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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