Re: [patch 1/4] sched/mmcid: Prevent CID stalls due to concurrent forks

[Jiri Slaby]

Thomas,

On 10. 03. 26, 21:28, Thomas Gleixner wrote:
> A newly forked task is accounted as MMCID user before the task is visible
> in the process' thread list and the global task list. This creates the
> following problem:
...
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -4729,8 +4729,12 @@ void sched_cancel_fork(struct task_struc
>   	scx_cancel_fork(p);
>   }
>   
> +static void sched_mm_cid_fork(struct task_struct *t);

This introduces:
[   97s] ../kernel/sched/core.c:4711:13: warning: 
‘sched_mm_cid_fork’ used but never defined
[   97s]  4711 | static void sched_mm_cid_fork(struct task_struct *t);
[   97s]       |             ^~~~~~~~~~~~~~~~~

on !CONFIG_SCHED_MM_CID configs. (gcc15-15.2.1+git10776-2.3)

thanks,
--
js
suse labs