Re: [PATCH 1/8] rcu/exp: Remove full barrier upon main thread wakeup

[Frederic Weisbecker]

Le Tue, Jan 30, 2024 at 04:47:16PM +0100, Frederic Weisbecker a écrit :
> Le Mon, Jan 29, 2024 at 03:23:39PM -0800, Boqun Feng a écrit :
> > From: Frederic Weisbecker <frederic@xxxxxxxxxx>
> > 
> > When an expedited grace period is ending, care must be taken so that all
> > the quiescent states propagated up to the root are correctly ordered
> > against the wake up of the main expedited grace period workqueue.
> > 
> > This ordering is already carried through the root rnp locking augmented
> > by an smp_mb__after_unlock_lock() barrier.
> > 
> > Therefore the explicit smp_mb() placed before the wake up is not needed
> > and can be removed.
> > 
> > Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx>
> > Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
> 
> [Offlist]

And yes that was not offlist, my fingers betrayed me!

> 
> For further posting, don't forget to add your own SoB while posting patches :-)
> 
> Thanks!
>