From: Mike Galbraith <efault@gmx.de>
To: paulmck@linux.vnet.ibm.com
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: TREE_SRCU slows hotplug by factor ~16
Date: Thu, 27 Apr 2017 07:44:00 +0200 [thread overview]
Message-ID: <1493271840.4154.25.camel@gmx.de> (raw)
In-Reply-To: <20170427053228.GA11107@linux.vnet.ibm.com>
On Wed, 2017-04-26 at 22:32 -0700, Paul E. McKenney wrote:
> 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?
Sure.
> 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. */
Yup, exactly what I did.
next prev parent reply other threads:[~2017-04-27 5:44 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-24 2:48 TREE_SRCU slows hotplug by factor ~16 Mike Galbraith
2017-04-24 3:32 ` Paul E. McKenney
2017-04-24 5:24 ` Mike Galbraith
2017-04-24 6:22 ` Paul E. McKenney
2017-04-24 7:35 ` Mike Galbraith
2017-04-24 8:43 ` Mike Galbraith
2017-04-24 16:24 ` Paul E. McKenney
2017-04-25 22:36 ` Paul E. McKenney
2017-04-26 14:31 ` Paul E. McKenney
2017-04-26 15:26 ` Mike Galbraith
2017-04-26 15:44 ` Paul E. McKenney
2017-04-26 15:49 ` Mike Galbraith
2017-04-26 16:00 ` Paul E. McKenney
2017-04-26 17:45 ` Mike Galbraith
2017-04-26 17:55 ` Paul E. McKenney
2017-04-26 17:56 ` Paul E. McKenney
2017-04-26 18:12 ` Mike Galbraith
2017-04-26 18:25 ` Paul E. McKenney
2017-04-27 3:43 ` Mike Galbraith
2017-04-27 4:11 ` Paul E. McKenney
2017-04-27 4:15 ` Mike Galbraith
2017-04-27 5:32 ` Paul E. McKenney
2017-04-27 5:44 ` Mike Galbraith [this message]
2017-04-27 12:37 ` Paul E. McKenney
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