Re: [PATCH 4/6] sched_ext: idle: introduce SCX_PICK_IDLE_IN_NODE

Tejun Heo
2025-02-07T22:02:40Z

On Fri, Feb 07, 2025 at 09:40:51PM +0100, Andrea Righi wrote:
> Introduce a new flag to restrict the selection of an idle CPU to a
> single specific NUMA node.
>
> Signed-off-by: Andrea Righi <arighi@nvidia.com>
> ---
> kernel/sched/ext.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
> index 0063a646124bc..8dbe22167c158 100644
> --- a/kernel/sched/ext.c
> +++ b/kernel/sched/ext.c
> @@ -775,6 +775,7 @@ enum scx_deq_flags {
>
> enum scx_pick_idle_cpu_flags {
> SCX_PICK_IDLE_CORE = 1LLU << 0, /* pick a CPU whose SMT siblings are also idle */
> + SCX_PICK_IDLE_IN_NODE = 1LLU << 1, /* pick a CPU in the same target NUMA node */
> };

Please merge this into the patch which actually uses the flag.

Thanks.

--
tejun