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-rw-r--r--kernel/sched/ext.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index a13a6461a290..97231a65487f 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -217,6 +217,11 @@ struct sched_ext_ops {
* is dispatched, the ops.enqueue() callback will be skipped. Finally,
* if @p is dispatched to SCX_DSQ_LOCAL, it will be dispatched to the
* local DSQ of whatever CPU is returned by this callback.
+ *
+ * Note that select_cpu() is never called for tasks that can only run
+ * on a single CPU or tasks with migration disabled, as they don't have
+ * the option to select a different CPU. See select_task_rq() for
+ * details.
*/
s32 (*select_cpu)(struct task_struct *p, s32 prev_cpu, u64 wake_flags);