Re: [RESEND][PATCH v31 8/9] sched: Add deactivated (sleeping) owner handling to find_proxy_task()

[Peter Zijlstra <peterz@infradead.org>]

On Thu, Aug 13, 2026 at 03:48:23PM +0200, Peter Zijlstra wrote:

> --- a/include/linux/sched.h
> +++ b/include/linux/sched.h
> @@ -1261,11 +1261,11 @@ struct task_struct {
>  	struct mutex			*blocked_on;	/* lock we're blocked on */
>  	raw_spinlock_t			blocked_lock;
>  #ifdef CONFIG_SCHED_PROXY_EXEC
> -	struct list_head		blocked_head;  /* tasks blocked on this task */
> +	struct list_head		blocked_head __guarded_by(&blocked_lock); /* tasks blocked on this task */
>  	struct list_head		blocked_node;  /* our entry on someone elses blocked_head */
>  	/* Node for list of tasks to process blocked_head list for blocked entitiy activations */
>  	struct list_head		blocked_activation_node;
> -	struct task_struct		*sleeping_owner; /* task our blocked_node is enqueued on */
> +	struct task_struct		*sleeping_owner __guarded_by(&blocked_lock); /* task our blocked_node is enqueued on */
>  #endif

Oh, cute, that last __guarded_by() isn't right. p->sleeping_owner is in
fact guarded by owner->blocked_lock. But clang isn't complaining :/