Re: [PATCH 4/5] xen/sched: rtds: make admission control cpupool-wide toggleable

[Jan Beulich <jbeulich@suse.com>]

On 26.08.2026 06:57, Furkan Caliskan wrote:
> @@ -1691,6 +1709,33 @@ rt_dom_cntl(
>      return rc;
>  }
>  
> +#ifdef CONFIG_SYSCTL
> +static int cf_check
> +rt_sys_cntl(const struct scheduler *ops,
> +             struct xen_sysctl_scheduler_op *sc)
> +{
> +    struct xen_sysctl_rtds_schedule *params = &sc->u.sched_rtds;
> +    struct rt_private *prv = rt_priv(ops);
> +    unsigned long flags;
> +
> +    switch ( sc->cmd )
> +    {
> +    case XEN_SYSCTL_SCHEDOP_putinfo:
> +        spin_lock_irqsave(&prv->lock, flags);
> +        prv->admission_control_enabled = params->admission_control_enabled;
> +        spin_unlock_irqrestore(&prv->lock, flags);
> +        break;
> +    case XEN_SYSCTL_SCHEDOP_getinfo:
> +        spin_lock_irqsave(&prv->lock, flags);
> +        params->admission_control_enabled = prv->admission_control_enabled;
> +        spin_unlock_irqrestore(&prv->lock, flags);
> +        break;
> +    }

Blank line please between non-fall-through case blocks.

> --- a/xen/include/public/sysctl.h
> +++ b/xen/include/public/sysctl.h
> @@ -814,6 +814,10 @@ struct xen_sysctl_credit2_schedule {
>      uint32_t ratelimit_us;
>  };
>  
> +struct xen_sysctl_rtds_schedule {
> +    bool admission_control_enabled;
> +};

In the public headers only fixed-width types may be used. The width of
bool is ABI-dependent (no matter that it's exceedingly unlikely to ever
be other than the same size as char).

Jan