[CRIU] [PATCH 03/10] cgroup: only collect cgsets once

[Pavel Emelyanov]

Applied as bug fix, but have one question:

> @@ -685,7 +688,7 @@ int dump_task_cgroup(struct pstree_item *item, u32 *cg_id, struct parasite_dump_
>  	if (parse_task_cgroup(pid, args, &ctls, &n_ctls))
>  		return -1;
>  
> -	cs = get_cg_set(&ctls, n_ctls);
> +	cs = get_cg_set(&ctls, n_ctls, &existed);
>  	if (!cs)
>  		return -1;
>  
> @@ -705,7 +708,7 @@ int dump_task_cgroup(struct pstree_item *item, u32 *cg_id, struct parasite_dump_
>  		 * The on-stack ctls is moved into cs inside
>  		 * the get_cg_set routine.
>  		 */
> -		if (cs != criu_cgset && collect_cgroups(&cs->ctls))
> +		if (cs != criu_cgset && !existed && collect_cgroups(&cs->ctls))
>  			return -1;
>  	}
>  

Maybe it's better to call collect_cgroups() right in get_cg_set()?