TREE_SRCU slows hotplug by factor ~16

From	Mike Galbraith <efault@gmx.de>
Newsgroups	linux.kernel
Subject	TREE_SRCU slows hotplug by factor ~16
Date	2017-04-24 05:00 +0200
Message-ID	<tzCoh-M8-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Greetings,

Running Steven's hotplug stress script in tip w. CLASSIC_SRCU takes 55s
in my i4790 box, whereas TREE_SRCU takes over 16m.  (Master with the
same config does it in 39s.. but then lockdep isn't enabled in master)

	-Mike

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TREE_SRCU slows hotplug by factor ~16 Mike Galbraith <efault@gmx.de> - 2017-04-24 05:00 +0200
  Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-24 05:40 +0200
    Re: TREE_SRCU slows hotplug by factor ~16 Mike Galbraith <efault@gmx.de> - 2017-04-24 07:30 +0200
      Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-24 08:30 +0200
        Re: TREE_SRCU slows hotplug by factor ~16 Mike Galbraith <efault@gmx.de> - 2017-04-24 09:40 +0200
          Re: TREE_SRCU slows hotplug by factor ~16 Mike Galbraith <efault@gmx.de> - 2017-04-24 10:50 +0200
          Re: TREE_SRCU slows hotplug by factor ~16 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-24 18:30 +0200

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