Re: [PATCH] cpu_pm: replace raw_notifier to atomic_notifier

From: Sebastian Andrzej Siewior
Date: Fri Jul 07 2017 - 06:25:50 EST

On 2017-07-06 16:47:46 [+0800], Alex Shi wrote:
> This patch replace a rwlock and raw notifier by atomic notifier which
+ is
> protected by spin_lock and rcu.
> Sebastian suggested using atomic_notifier instead of rwlock, which is not
> only removing the sleeping in idle, but also getting better latency
> improvement.

Did you measure this / have numbers or did you write this because this
is what RCU does in general?

Acked-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>