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Groups > linux.kernel > #1461204

Re: clocksource_watchdog causing scheduling of timers every second (was [v13] support "task_isolation" mode)

From Christoph Lameter <cl@linux.com>
Newsgroups linux.kernel
Subject Re: clocksource_watchdog causing scheduling of timers every second (was [v13] support "task_isolation" mode)
Date 2016-08-12 16:30 +0200
Message-ID <s5lDc-2Nj-29@gated-at.bofh.it> (permalink)
References (6 earlier) <s4K0W-2GI-29@gated-at.bofh.it> <s4TQC-1tP-23@gated-at.bofh.it> <s56Ea-1t7-11@gated-at.bofh.it> <s57gS-25e-25@gated-at.bofh.it> <s57Tz-2lF-17@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Thu, 11 Aug 2016, Paul E. McKenney wrote:

> Heh!  The only really good idea is for clocks to be reliably in sync.
>
> But if they go out of sync, what do you want to do instead?

For a NOHZ task? Write a message to the syslog and reenable tick.

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Re: clocksource_watchdog causing scheduling of timers every second  (was [v13] support "task_isolation" mode) Frederic Weisbecker <fweisbec@gmail.com> - 2016-08-11 00:20 +0200
  Re: clocksource_watchdog causing scheduling of timers every second  (was [v13] support "task_isolation" mode) Peter Zijlstra <peterz@infradead.org> - 2016-08-11 10:50 +0200
    Re: clocksource_watchdog causing scheduling of timers every second  (was [v13] support "task_isolation" mode) Frederic Weisbecker <fweisbec@gmail.com> - 2016-08-11 14:10 +0200
    Re: clocksource_watchdog causing scheduling of timers every second  (was [v13] support "task_isolation" mode) "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-08-12 00:30 +0200
      Re: clocksource_watchdog causing scheduling of timers every second  (was [v13] support "task_isolation" mode) Christoph Lameter <cl@linux.com> - 2016-08-12 01:10 +0200
        Re: clocksource_watchdog causing scheduling of timers every second  (was [v13] support "task_isolation" mode) "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-08-12 01:50 +0200
          Re: clocksource_watchdog causing scheduling of timers every second  (was [v13] support "task_isolation" mode) Christoph Lameter <cl@linux.com> - 2016-08-12 16:30 +0200
            Re: clocksource_watchdog causing scheduling of timers every second  (was [v13] support "task_isolation" mode) Frederic Weisbecker <fweisbec@gmail.com> - 2016-08-12 16:30 +0200
              Re: clocksource_watchdog causing scheduling of timers every second  (was [v13] support "task_isolation" mode) "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-08-12 18:20 +0200
                Re: clocksource_watchdog causing scheduling of timers every second  (was [v13] support "task_isolation" mode) Frederic Weisbecker <fweisbec@gmail.com> - 2016-08-13 17:40 +0200

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