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| author | Andrea Righi <arighi@nvidia.com> | 2024-10-23 13:19:07 +0200 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2024-10-23 09:20:09 -1000 |
| commit | b452ae4d20aefe96232440421faed37c9d3410a7 (patch) | |
| tree | 420da0df0ecab366f487d39e9c9d9347a97e198a /kernel/sched | |
| parent | 21b8964826c4da3cc8ed89308f8838cfd221429f (diff) | |
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: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/ext.c | 5 |
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); |