Messages in this thread | | | Date | Wed, 1 Jul 2015 20:15:29 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH RFC tip/core/rcu 0/5] Expedited grace periods encouraging normal ones |
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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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