Re: [PATCH v2 27/33] x86/intel_rdt_rdtgroup.c: Implement resctrl file system commands

[Shaohua Li]

On Thu, Sep 08, 2016 at 02:57:21AM -0700, Fenghua Yu wrote:
>  /*
>   * kernfs_root - find out the kernfs_root a kernfs_node belongs to
> @@ -730,6 +749,110 @@ static void rdtgroup_destroy_locked(struct rdtgroup *rdtgrp)
>  	kernfs_remove(rdtgrp->kn);
>  }
>  
> +static int rdtgroup_mkdir(struct kernfs_node *parent_kn, const char *name,
> +			umode_t mode)
> +{
> +	struct rdtgroup *parent, *rdtgrp;
> +	struct rdtgroup_root *root;
> +	struct kernfs_node *kn;
> +	int ret;
> +
> +	if (parent_kn != root_rdtgrp->kn)
> +		return -EPERM;
> +

So we can't create nested groups. Is this limitation temporary? I don't see
this is mentioned in the interface document.

Thanks,
Shaohua