Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule be Tasks RCU quiescent state

From	"Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule be Tasks RCU quiescent state
Date	2017-09-28 18:30 +0200
Message-ID	<uuJRg-2NO-23@gated-at.bofh.it> (permalink)
References	(1 earlier) <ty17r-5PA-9@gated-at.bofh.it> <uuDsv-7h4-21@gated-at.bofh.it> <uuGgG-yM-15@gated-at.bofh.it> <uuJey-2kP-13@gated-at.bofh.it> <uuJxU-2Gx-11@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Sep 28, 2017 at 06:08:56PM +0200, Peter Zijlstra wrote:
>On Thu, Sep 28, 2017 at 03:38:16PM +0000, Levin, Alexander (Sasha Levin) wrote:
>> On Thu, Sep 28, 2017 at 05:30:55AM -0700, Paul E. McKenney wrote:
>
>> >Hmmm...  kernel/rcu/tree_plugin.h:329 thinks that someone slept (as opposed
>> >to was preempted) in an RCU read-side critical section.
>
>Sasha, was this on one of those kernels that did a printk() from
>scheduler context?

No, it was an older kernel (about a month old -next), I also didn't do
any CPU hotplug in this set of tests.

-- 

Thanks,
Sasha

Thread

Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state Sasha Levin <levinsasha928@gmail.com> - 2017-09-28 11:40 +0200
  Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-28 14:40 +0200
    Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-28 17:50 +0200
      Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state Peter Zijlstra <peterz@infradead.org> - 2017-09-28 18:10 +0200
        Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com> - 2017-09-28 18:30 +0200
      Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-28 18:10 +0200
        Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state Peter Zijlstra <peterz@infradead.org> - 2017-09-28 18:20 +0200
          Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-28 18:40 +0200
        Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state Boqun Feng <boqun.feng@gmail.com> - 2017-09-29 11:40 +0200
          Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state Paolo Bonzini <pbonzini@redhat.com> - 2017-09-29 12:10 +0200
            Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state Boqun Feng <boqun.feng@gmail.com> - 2017-09-29 12:30 +0200
            Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state Peter Zijlstra <peterz@infradead.org> - 2017-09-29 12:40 +0200
              Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state Paolo Bonzini <pbonzini@redhat.com> - 2017-09-29 13:50 +0200
                Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-29 19:00 +0200
            Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule  be Tasks RCU quiescent state "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-29 19:00 +0200

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