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

Andrea Righi
2025-02-07T21:11:40Z

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 */
};

enum scx_kick_flags {
--
2.48.1