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

From: Christoph Lameter
Date: Wed Jul 27 2016 - 15:53:56 EST

On Wed, 27 Jul 2016, Chris Metcalf wrote:

> Looks good. Did you omit the equivalent fix in clocksource_start_watchdog()
> on purpose? For now I just took your change, but tweaked it to add the
> equivalent diff with cpumask_first_and() there.

Can the watchdog be started on an isolated cpu at all? I would expect that
the code would start a watchdog only on a housekeeping cpu.