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Groups > linux.kernel > #1550967
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| From | "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> |
| Newsgroups | linux.kernel |
| Subject | Re: INFO: rcu_sched self-detected stall on CPU |
| Date | Wed, 04 Jan 2017 17:20:02 +0100 |
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| X-Original-Cc | Enrico Mioso <mrkiko.rs@gmail.com>, linux-kernel@vger.kernel.org, Josh Triplett <josh@joshtriplett.org>, Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
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On Wed, Jan 04, 2017 at 09:16:31AM -0500, Steven Rostedt wrote: > 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? Good point -- but you will need to build with CONFIG_RCU_TRACE=y to get most of the RCU events. Thanx, Paul
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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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