Re: [patch] sched: add locking when update the task_group'scfs_rq[] array.

[Ingo Molnar]

* Ken Chen <kenchen@xxxxxxxxxx> wrote:

> @@ -1513,8 +1513,12 @@ static int tg_shares_up
>  	unsigned long weight, rq_weight = 0;
>  	unsigned long shares = 0;
>  	struct sched_domain *sd = data;
> +	unsigned long flags;
>  	int i;
> 
> +	if (!spin_trylock_irqsave(&tg->tg_lock, flags))
> +		return 0;

hm, why trylock?

	Ingo
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