Re: [Xen-devel] [PATCH 4/5] xen: RCU: don't let a CPU with a callback go idle.

["Jan Beulich" <jbeulich@xxxxxxxx>]

>>> Dario Faggioli <dario.faggioli@xxxxxxxxxx> 07/27/17 10:01 AM >>>
>In this commit, we implement the above, using rcu_needs_cpu(),
>in a way similar to how it is used in Linux. This it correct,
>useful and not wasteful for CPUs that participate in grace
>period, but have not a callback queued. For the ones that
>has callbacks, an optimization that avoids having to spin is
>introduced in next commit.

As always, you can't know what will be the "next commit". Please use
e.g. "in a subsequent change". Other than that

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>

Jan


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