Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1696057

Re: [PATCH tip/core/rcu 03/15] rcu: Drive TASKS_RCU directly off of PREEMPT

Show all headers | View raw

On Tue, Jul 25, 2017 at 02:14:05PM -0400, Steven Rostedt wrote:
> On Mon, 24 Jul 2017 14:44:32 -0700
> "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> wrote:
> 
> > The actual use of TASKS_RCU is only when PREEMPT, otherwise RCU-sched
> > is used instead.  This commit therefore makes synchronize_rcu_tasks()
> > and call_rcu_tasks() available always, but mapped to synchronize_sched()
> > and call_rcu_sched(), respectively, when !PREEMPT.  This approach also
> > allows some #ifdefs to be removed from rcutorture.
> 
> Hmm, I'll need to update ftrace. I believe I call synchronize_sched()
> twice with !PREEMPT then.

Does this mean that synchronize_rcu_tasks() should invoke
synchronize_sched() twice?  Easy change to make, if so.

							Thanx, Paul

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH tip/core/rcu 0/15] General fixes "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200
  [PATCH tip/core/rcu 04/15] rcu: Create reasonable API for do_exit() TASKS_RCU processing "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200
  [PATCH tip/core/rcu 09/15] rcu: use idle versions of swait to make idle-hack clear "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200
  [PATCH tip/core/rcu 02/15] rcu: Use timer as backstop for NOCB deferred wakeups "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200
    Re: [PATCH tip/core/rcu 02/15] rcu: Use timer as backstop for NOCB  deferred wakeups Steven Rostedt <rostedt@goodmis.org> - 2017-07-25 20:20 +0200
      Re: [PATCH tip/core/rcu 02/15] rcu: Use timer as backstop for NOCB  deferred wakeups "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-25 21:20 +0200
        Re: [PATCH tip/core/rcu 02/15] rcu: Use timer as backstop for NOCB  deferred wakeups Steven Rostedt <rostedt@goodmis.org> - 2017-07-26 00:20 +0200
          Re: [PATCH tip/core/rcu 02/15] rcu: Use timer as backstop for NOCB  deferred wakeups "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-26 02:10 +0200
            Re: [PATCH tip/core/rcu 02/15] rcu: Use timer as backstop for NOCB  deferred wakeups Steven Rostedt <rostedt@goodmis.org> - 2017-07-26 23:20 +0200
              Re: [PATCH tip/core/rcu 02/15] rcu: Use timer as backstop for NOCB  deferred wakeups "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-26 23:50 +0200
                Re: [PATCH tip/core/rcu 02/15] rcu: Use timer as backstop for NOCB  deferred wakeups Steven Rostedt <rostedt@goodmis.org> - 2017-07-27 01:10 +0200
                Re: [PATCH tip/core/rcu 02/15] rcu: Use timer as backstop for NOCB  deferred wakeups "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-27 19:40 +0200
  [PATCH tip/core/rcu 10/15] rcu: Add TPS() protection for _rcu_barrier_trace strings "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200
    Re: [PATCH tip/core/rcu 10/15] rcu: Add TPS() protection for  _rcu_barrier_trace strings Steven Rostedt <rostedt@goodmis.org> - 2017-07-28 03:50 +0200
  [PATCH tip/core/rcu 14/15] rcu: Add warning to rcu_idle_enter() for irqs enabled "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200
  [PATCH tip/core/rcu 01/15] sched,rcu: Make cond_resched() provide RCU quiescent state "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200
  [PATCH tip/core/rcu 08/15] swait: add idle variants which don't contribute to load average "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200
  [PATCH tip/core/rcu 15/15] rcu: Remove exports from rcu_idle_exit() and rcu_idle_enter() "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200
  [PATCH tip/core/rcu 03/15] rcu: Drive TASKS_RCU directly off of PREEMPT "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200
    Re: [PATCH tip/core/rcu 03/15] rcu: Drive TASKS_RCU directly off of  PREEMPT Steven Rostedt <rostedt@goodmis.org> - 2017-07-25 20:20 +0200
      Re: [PATCH tip/core/rcu 03/15] rcu: Drive TASKS_RCU directly off of  PREEMPT "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-25 21:20 +0200
  [PATCH tip/core/rcu 12/15] rcu: Add assertions verifying blocked-tasks list "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200
  [PATCH tip/core/rcu 05/15] rcu: Add TPS() to event-traced strings "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200
    Re: [PATCH tip/core/rcu 05/15] rcu: Add TPS() to event-traced  strings Steven Rostedt <rostedt@goodmis.org> - 2017-07-28 03:40 +0200
  [PATCH tip/core/rcu 06/15] rcu: Move rcu.h to new trivial-function style "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-24 23:50 +0200

csiph-web