diff options
| -rw-r--r-- | kernel/workqueue.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 3992cf6c3ee3..6202b08f1933 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -2253,7 +2253,25 @@ repeat: if (get_work_pwq(work) == pwq) move_linked_works(work, scheduled, &n); - process_scheduled_works(rescuer); + if (!list_empty(scheduled)) { + process_scheduled_works(rescuer); + + /* + * The above execution of rescued work items could + * have created more to rescue through + * pwq_activate_first_delayed() or chained + * queueing. Let's put @pwq back on mayday list so + * that such back-to-back work items, which may be + * being used to relieve memory pressure, don't + * incur MAYDAY_INTERVAL delay inbetween. + */ + if (need_to_create_worker(pool)) { + spin_lock(&wq_mayday_lock); + get_pwq(pwq); + list_move_tail(&pwq->mayday_node, &wq->maydays); + spin_unlock(&wq_mayday_lock); + } + } /* * Put the reference grabbed by send_mayday(). @pool won't |