vchiq: Performance regression since 5.18-rc1

[Paul E. McKenney]

On Wed, May 25, 2022 at 04:26:27PM +0200, Sebastian Andrzej Siewior wrote:
> On 2022-05-25 16:07:47 [+0200], Stefan Wahren wrote:
> > this was the same as Paul send. I think i need more time for investigation,
> > maybe there is an issue with the application.
> 
> I haven't seen Paul referring to *that* patch. He pointed to some fs/
> related changes.

True!  Both patches changed from a synchronize_rcu() to a
synchronize_rcu_expedited(), but different instances of synchronize_rcu().

							Thanx, Paul