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From:   Valentin Schneider <valentin.schneider@arm.com>
To:     Lingutla Chandrasekhar <clingutla@codeaurora.org>,
        linux-kernel@vger.kernel.org
Cc:     juri.lelli@redhat.com, vincent.guittot@linaro.org,
        dietmar.eggemann@arm.com, rostedt@goodmis.org,
        pkondeti@codeaurora.org, peterz@infradead.org, mingo@kernel.org,
        Lingutla Chandrasekhar <clingutla@codeaurora.org>
Subject: Re: [PATCH] sched/fair: Ignore percpu threads for imbalance pulls
In-Reply-To: <jhjim6qsq8g.mognet@arm.com>
References: <20210217120854.1280-1-clingutla@codeaurora.org> <jhjim6qsq8g.mognet@arm.com>
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Date:   Thu, 18 Feb 2021 18:51:24 +0000
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On 17/02/21 14:50, Valentin Schneider wrote:
> @@ -7539,6 +7539,9 @@ int can_migrate_task(struct task_struct *p, struct lb_env *env)
>       if (throttled_lb_pair(task_group(p), env->src_cpu, env->dst_cpu))
>               return 0;
>
> +	if (kthread_is_per_cpu(p))
> +		return 0;
> +

That's missing a (p->flags & PF_KTHREAD), but you get the idea...