On 12/12, David Hildenbrand wrote:
>
> void get_online_cpus(void)
> {
> @@ -103,8 +95,7 @@ void get_online_cpus(void)
> return;
> cpuhp_lock_acquire_read();
> mutex_lock(&cpu_hotplug.lock);
> - apply_puts_pending(65536);
> - cpu_hotplug.refcount++;
> + atomic
On Fri, Dec 12, 2014 at 10:11:44AM +0100, David Hildenbrand wrote:
> Commit b2c4623dcd07 ("rcu: More on deadlock between CPU hotplug and expedited
> grace periods") introduced another problem that can easily be reproduced by
> starting/stopping cpus in a loop.
>
> E.g.:
> for i in `seq 5000`; do
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