Re: [RFC PATCH 2/5] sched: Add NOHZ_STATS_KICK

From: Peter Zijlstra
Date: Fri Dec 22 2017 - 02:56:55 EST

On Thu, Dec 21, 2017 at 05:23:27PM +0100, Vincent Guittot wrote:
> Hi Peter,
> I think that part of the proposal is missing.
> One goal of the patchset was to kick an update of the stats of idle
> cpu when a task wake up on a cpu but the statistic has not been
> updated for a while.
> That's why there where a call to nohz_kick_needed in the proposal to
> kick ilb but only for updating blocked load and not a full idle load
> balance
> I can't find this call any more in your patchset

Yeah, I took it out because it didn't make sense to me. If you're waking
to a stale CPU, you're too late.