Re: [tip: sched/core] sched/topology: Introduce sched_group::flags

[Peter Zijlstra]

On Tue, Oct 05, 2021 at 02:12:02PM -0000, tip-bot2 for Ricardo Neri wrote:

> index 4e8698e..c56faae 100644
> --- a/kernel/sched/topology.c
> +++ b/kernel/sched/topology.c
> @@ -716,8 +716,20 @@ cpu_attach_domain(struct sched_domain *sd, struct root_domain *rd, int cpu)
>  		tmp = sd;
>  		sd = sd->parent;
>  		destroy_sched_domain(tmp);
> -		if (sd)
> +		if (sd) {
> +			struct sched_group *sg = sd->groups;
> +
> +			/*
> +			 * sched groups hold the flags of the child sched
> +			 * domain for convenience. Clear such flags since
> +			 * the child is being destroyed.
> +			 */
> +			do {
> +				sg->flags = 0;
> +			} while (sg != sd->groups);


I happened to be reading this here code and aren't we missing:

	sg = sg->next;

somewhere in that loop?