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

On Fri, Aug 12, 2016 at 09:23:13AM -0500, Christoph Lameter wrote:

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

quoted

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.

Indeed, a strong clocksource is a requirement for a full tickless machine.