Re: [RFC,v2 2/3] sched: set number of iterations to h_nr_running

From: Uladzislau Rezki
Date: Thu Feb 09 2017 - 14:00:30 EST

On Thu, Feb 9, 2017 at 1:20 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> On Wed, Feb 08, 2017 at 09:43:28AM +0100, Uladzislau Rezki wrote:
>> From: Uladzislau 2 Rezki <uladzislau2.rezki@xxxxxxxxxxxxxx>
>> It is possible that busiest run queue has multiple RT tasks,
>> whereas no CFS tasks, that is why it is reasonable to use
>> h_nr_running instead, because a load balance only applies
>> for CFS related tasks.

> Sure, I suppose that makes sense, but then it would make even more sense
> to do a more thorough audit of the code and make sure all remaining
> rq::nr_running uses are correct.
Indeed. I did not want to touch othe places, due to my specific test case.
There are still a few raming places. I can prepare a new patch that covers
all of them if that is ok.

Uladzislau Rezki