If migrate_enable() is called while a task is preparing to sleep (state != TASK_RUNNING), that triggers a debug check in stop_one_cpu(). Explicitly reset state to acknowledge that we're accepting the spurious wakeup.
Signed-off-by: Scott Wood <[email protected]> --- kernel/sched/core.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 38a9a9df5638..eb27a9bf70d7 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -7396,6 +7396,14 @@ void migrate_enable(void) unpin_current_cpu(); preempt_lazy_enable(); preempt_enable(); + + /* + * Avoid sleeping with an existing non-running + * state. This will result in a spurious wakeup + * for the calling context. + */ + __set_current_state(TASK_RUNNING); + sleeping_lock_inc(); stop_one_cpu(task_cpu(p), migration_cpu_stop, &arg); sleeping_lock_dec(); -- 1.8.3.1
