Commit b452ae4d authored by Andrea Righi's avatar Andrea Righi Committed by Tejun Heo
Browse files

sched_ext: Clarify ops.select_cpu() for single-CPU tasks 



Update ops.select_cpu() documentation to clarify that this method is not
called for tasks that are restricted to run on a single CPU, as these
tasks do not have the option to select a different CPU.

Signed-off-by: default avatarAndrea Righi <arighi@nvidia.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 21b89648

kernel/sched/ext.c

+5 −0
Original line number Diff line number Diff line
@@ -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);