Re: [PATCH v3 1/7] sched/fair: Ignore percpu threads for imbalance pulls

[Dietmar Eggemann]

Hi Chandra,

On 16/03/2021 17:03, Chandra Sekhar Lingutla wrote:
> Hi Dietmar,
> 
> On 3/16/2021 9:19 PM, Dietmar Eggemann wrote:
>> On 11/03/2021 13:05, Valentin Schneider wrote:
>>> From: Lingutla Chandrasekhar <clingutla@xxxxxxxxxxxxxx>

[...]

>>> CPUs 2-3 as Bigs with below scenario:
>>> - CPU0 doing newly_idle balancing
>>> - CPU1 running percpu kworker and RT task (small tasks)
>> What's the role of the small RT task here in the story?
> This is to satisfy 'busiest->nr_running > 1' checks.

Ah, I see. Forgot about this bit of the story, the 'if
(busiest->nr_running > 1)' in load_balance().

[...]