Re: [PATCH v3 01/14] sched/core: uclamp: extend sched_setattr to support utilization clamping

[Juri Lelli]

On 06/08/18 17:39, Patrick Bellasi wrote:

[...]

> @@ -4218,6 +4245,13 @@ static int __sched_setscheduler(struct task_struct *p,
>  			return retval;
>  	}
>  
> +	/* Configure utilization clamps for the task */
> +	if (attr->sched_flags & SCHED_FLAG_UTIL_CLAMP) {
> +		retval = __setscheduler_uclamp(p, attr);
> +		if (retval)
> +			return retval;
> +	}
> +

IIUC, this is available to root and non-root users. In the latter case,
how do we cope with the fact that some user might occupy all the
available clamping groups configured for the system?

Best,

- Juri