Re: [PATCH RFC tip/core/rcu 0/5] Expedited grace periods encouraging normal ones

From: Mike Galbraith
Date: Wed Jul 01 2015 - 22:51:01 EST


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.

-Mike

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/