On 07/07/2017 06:25 PM, Sebastian Andrzej Siewior wrote: > 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?
Uh, I have no number on the performance. The benefit is in the theory. https://lwn.net/Articles/263130/ But above article give some comparison data of rwlock and RCU. > > Acked-by: Sebastian Andrzej Siewior <[email protected]> > Thanks a lot! Regards Alex
