Re: [v2 PATCH 4/4] timers: logic to enable timer migration.

[Oleg Nesterov]

On 03/04, Arun R Bharadwaj wrote:
>
> +++ linux.trees.git/kernel/sched.c
> @@ -4009,6 +4009,11 @@ static struct {
>  	.load_balancer = ATOMIC_INIT(-1),
>  };
>
> +inline int get_nohz_load_balancer(void)

inline?

> +{
> +	return atomic_read(&nohz.load_balancer);
> +}

Shouldn't we reset .load_balancer when this CPU is CPU_DOWN'ed ?
Otherwise the timer can migrate to the dead CPU.

Oleg.

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