Re: [PATCH V2 5/6] cpufreq: governor: replace per-cpu delayed work with timers

Viresh Kumar
2015-12-08T13:30:36Z

On 08-12-15, 14:18, Rafael J. Wysocki wrote:
> Well, if the timer function runs on all CPUs at the same time, they all
> can see skip_work > 1 and none of them will queue the work.

You are talking about code after my patch, right?

Will will all of them see it > 1? At least one of them will see it 0
and queue the work, unless the governor is stopped completely.

> You are right, I've overlooked that race (but then it is rather easy to
> overlook).

Yeah, we (at least I) took a long time to understand that this was the
real problem we always had and so fixed it recently.

--
viresh