diff options
| author | Tejun Heo <tj@kernel.org> | 2018-01-08 05:38:37 -0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2018-01-08 05:38:37 -0800 |
| commit | 40c17f75dfa9ec163478efd3f7443fd6af9992c9 (patch) | |
| tree | 92ad5e8e9475b19306fea16c42bde00059c15fb9 /kernel/workqueue.c | |
| parent | 983c751532738b83c4c5b51192ebc6fbfe9330f7 (diff) | |
| download | lwn-40c17f75dfa9ec163478efd3f7443fd6af9992c9.tar.gz lwn-40c17f75dfa9ec163478efd3f7443fd6af9992c9.zip | |
workqueue: allow WQ_MEM_RECLAIM on early init workqueues
Workqueues can be created early during boot before workqueue subsystem
in fully online - work items are queued waiting for later full
initialization. However, early init wasn't supported for
WQ_MEM_RECLAIM workqueues causing unnecessary annoyances for a subset
of users. Expand early init support to include WQ_MEM_RECLAIM
workqueues.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/workqueue.c')
| -rw-r--r-- | kernel/workqueue.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 5baac7c8a5f9..c86cc1ed678b 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -4032,7 +4032,7 @@ struct workqueue_struct *__alloc_workqueue_key(const char *fmt, if (alloc_and_link_pwqs(wq) < 0) goto err_free_wq; - if (init_rescuer(wq) < 0) + if (wq_online && init_rescuer(wq) < 0) goto err_destroy; if ((wq->flags & WQ_SYSFS) && workqueue_sysfs_register(wq)) @@ -5639,6 +5639,8 @@ int __init workqueue_init(void) * archs such as power and arm64. As per-cpu pools created * previously could be missing node hint and unbound pools NUMA * affinity, fix them up. + * + * Also, while iterating workqueues, create rescuers if requested. */ wq_numa_init(); @@ -5650,8 +5652,12 @@ int __init workqueue_init(void) } } - list_for_each_entry(wq, &workqueues, list) + list_for_each_entry(wq, &workqueues, list) { wq_update_unbound_numa(wq, smp_processor_id(), true); + WARN(init_rescuer(wq), + "workqueue: failed to create early rescuer for %s", + wq->name); + } mutex_unlock(&wq_pool_mutex); |