Re: [PATCH 0/2] nohz_full: Offload task_tick to remote housekeeping cpus for nohz_full cpus

From: Frederic Weisbecker
Date: Thu Aug 13 2015 - 08:44:10 EST

On Thu, Aug 13, 2015 at 02:22:23PM +0200, Peter Zijlstra wrote:
> On Thu, Aug 13, 2015 at 02:55:36PM +0530, Vatika Harlalka wrote:
> > This patchset is for offloading task_tick() to a remote housekeeping
> > cpu. The larger aim is to stop ticks on nohz_full cpus. For this, extra
> > work must be done by housekeeping cpus. So, task_tick is called from a
> > delayed workqueue for nohz_full cpus and the work is requeued every second
> > for those nohz_full cpus whose ticks are stopped while they are busy. In
> > the rest of the cases it will lead to redundant accounting. To facilitate
> > this, a new function tick_nohz_remote_tick_stopped is added to indicate
> > whether ticks are stopped on a remote cpu.
> > Tick related code in core.c is moved to tick.c
> *sigh* of course you didn't read what I've written on this topic..

What is it? Note Vatika wrote this after my suggestion, so if there is an issue,
I'm likely the responsible :-) But I don't recall you opposed to this solution.

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