On Thu, Jul 02, 2015 at 04:50:45AM +0200, Mike Galbraith wrote:
> On Wed, 2015-07-01 at 19:18 -0700, Paul E. McKenney wrote:
>
> > Does their normal workload trigger the condition that results in the
> > expedited grace period? If so, do they use NO_HZ_FULL?
>
> They're having no trouble that I'm aware of, and I definitely would be
> made aware. They're not currently using a kernel with NO_HZ_FULL even
> built in, as that stuff is far far too raw in the current kernel.
>
> They may meet a NO_HZ_FULL enabled kernel soonish, but will be told to
> not turn it on for anything other than pure compute, as NO_HZ_FULL is
> currently not usable for mixed load in partitioned box, much less rt.
OK, sounds like synchronize_rcu_expedited() is a complete non-problem
for them, then.
Thanx, Paul
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