Messages in this thread Patch in this message | | | Date | Wed, 26 Apr 2017 22:32:28 -0700 | From | "Paul E. McKenney" <> | Subject | Re: TREE_SRCU slows hotplug by factor ~16 |
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On Thu, Apr 27, 2017 at 06:15:56AM +0200, Mike Galbraith wrote: > On Wed, 2017-04-26 at 21:11 -0700, Paul E. McKenney wrote: > > > This is with srcutree.exp_holdoff set to 25*1000? > > Yup.
And please see below for the trivial patch, just for confirmation. May I add your Tested-by?
Thanx, Paul
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diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c index ccbe1fb84165..65f03bca5b32 100644 --- a/kernel/rcu/srcutree.c +++ b/kernel/rcu/srcutree.c @@ -39,7 +39,7 @@ #include "rcu.h" -ulong exp_holdoff = 50 * 1000; /* Holdoff (ns) for auto-expediting. */ +ulong exp_holdoff = 25 * 1000; /* Holdoff (ns) for auto-expediting. */ module_param(exp_holdoff, ulong, 0444); static void srcu_invoke_callbacks(struct work_struct *work);
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