Re: INFO: rcu_sched self-detected stall on CPU

From	Steven Rostedt <rostedt@goodmis.org>
Newsgroups	linux.kernel
Subject	Re: INFO: rcu_sched self-detected stall on CPU
Date	2017-01-04 15:20 +0100
Message-ID	<sVUA2-5Oz-29@gated-at.bofh.it> (permalink)
References	<sVQwp-2U6-5@gated-at.bofh.it> <sVU70-5lr-39@gated-at.bofh.it>
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On Wed, 4 Jan 2017 05:46:08 -0800
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com> wrote:

> I suggest enabling tracing for timers with a goal of working out why
> the rcu_sched task is not being awakened regularly -- during a grace
> period, it should be awakened every three jiffies or so (depending on
> the value of HZ).

Perhaps enable events for rcu, sched and irqs as well?

-- Steve

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Re: INFO: rcu_sched self-detected stall on CPU Steven Rostedt <rostedt@goodmis.org> - 2017-01-04 15:20 +0100
  Re: INFO: rcu_sched self-detected stall on CPU Enrico Mioso <mrkiko.rs@gmail.com> - 2017-01-04 16:50 +0100
  Re: INFO: rcu_sched self-detected stall on CPU "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-04 17:20 +0100
    Re: INFO: rcu_sched self-detected stall on CPU Enrico Mioso <mrkiko.rs@gmail.com> - 2017-01-05 19:40 +0100
      Re: INFO: rcu_sched self-detected stall on CPU "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-06 08:50 +0100

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