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From: Luiz Capitulino <lcapitulino@redhat.com>
To: linux-rt-users@vger.kernel.org
Cc: bigeasy@linutronix.de, joshc@ni.com, mst@redhat.com,
	paulmck@linux.vnet.ibm.com
Subject: Making rcu_normal=1 in RT
Date: Wed, 12 Oct 2016 11:12:51 -0400	[thread overview]
Message-ID: <20161012111251.74d1d52e@redhat.com> (raw)

Hi,

We have the following patch applied to the RT tree:

  commit a9d3cc781a3306bfa332fa7cb6134b70696058d5
  Author: Josh Cartwright <joshc@ni.com>
  Date:   Tue Oct 27 07:31:53 2015 -0500
  
      net: Make synchronize_rcu_expedited() conditional on !RT_FULL

However, as noted by Michael, making rcu_normal=1 default in the
RT kernel should have the same effect (ie.  not calling
synchronize_sched_expedited()).

So, honest question, is there a reason not to:

 1. Drop the patch above
 2. Make rcu_normal=1 default?

             reply	other threads:[~2016-10-12 15:48 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-12 15:12 Luiz Capitulino [this message]
2016-10-12 16:21 ` Making rcu_normal=1 in RT Julia Cartwright
2016-10-12 16:39   ` Paul E. McKenney
2016-10-12 16:49   ` Luiz Capitulino
2016-10-12 17:15     ` Julia Cartwright
2016-10-12 20:32       ` Paul E. McKenney
2016-10-13 16:25         ` Michael S. Tsirkin
2016-10-14  9:20           ` Paul E. McKenney
2016-10-16  1:45             ` Michael S. Tsirkin
2016-10-16 11:28               ` Paul E. McKenney
2016-10-31 17:38                 ` Sebastian Andrzej Siewior
2016-10-31 18:15                   ` Paul E. McKenney
2016-10-31 22:37                     ` Michael S. Tsirkin
2016-11-01  2:19                       ` Paul E. McKenney
2016-11-01  2:36                         ` Michael S. Tsirkin
2016-11-01  2:52                           ` Paul E. McKenney
2016-11-01  3:31                             ` Michael S. Tsirkin
2016-11-02 16:05                               ` Sebastian Andrzej Siewior
2016-11-03 16:26                                 ` Paul E. McKenney
2016-11-02 16:30                     ` [PATCH] rcu: update: make RCU_EXPEDITE_BOOT default Sebastian Andrzej Siewior
2016-11-03 16:22                       ` Paul E. McKenney
2016-11-03 16:33                         ` Sebastian Andrzej Siewior
2016-11-03 16:59                           ` Paul E. McKenney
2016-11-07 17:19                             ` Steven Rostedt
2016-11-07 17:30                               ` Sebastian Andrzej Siewior
2016-11-07 17:35                                 ` Josh Triplett
2016-11-07 18:05                                   ` Paul E. McKenney
2016-11-07 18:08                                     ` Josh Triplett
2016-11-07 19:04                                       ` Paul E. McKenney
2016-11-09  6:26                       ` [rcu] c6908ba082: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 26689 jiffies s: 9 root: 0x1/ kernel test robot
2016-11-02 16:51   ` Making rcu_normal=1 in RT Sebastian Andrzej Siewior
2016-11-02 17:41     ` Luiz Capitulino

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