Re: [Xen-devel] [PATCH v3 43/47] xen/sched: support multiple cpus per scheduling resource

[Jan Beulich <jbeulich@xxxxxxxx>]

On 14.09.2019 10:52, Juergen Gross wrote:
> --- a/xen/common/schedule.c
> +++ b/xen/common/schedule.c
> @@ -59,7 +59,7 @@ integer_param("sched_ratelimit_us", sched_ratelimit_us);
>  enum sched_gran __read_mostly opt_sched_granularity = SCHED_GRAN_cpu;
>  unsigned int __read_mostly sched_granularity = 1;
>  bool __read_mostly sched_disable_smt_switching;
> -const cpumask_t *sched_res_mask = &cpumask_all;
> +cpumask_var_t sched_res_mask;

For a non-automatic variable it might be even easier to have it
be cpumask_t?

> @@ -2401,6 +2407,8 @@ static int cpu_schedule_up(unsigned int cpu)
>      /* We start with cpu granularity. */
>      sd->granularity = 1;
>  
> +    cpumask_set_cpu(cpu, sched_res_mask);

I'm missing the clearing counterpart.

Jan

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