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workqueue: Make rescuer initialization as the last step of the creation of a new wq

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For early wq allocation, rescuer initialization is the last step of the
creation of a new wq.  Make the behavior the same for all allocations.

Prepare for initializing rescuer's affinities with the default pwq's
affinities.

Prepare for moving the whole workqueue initializing procedure into
wq_pool_mutex and cpu hotplug locks.

Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Waiman Long <longman@redhat.com>
Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Lai Jiangshan 2024-07-04 11:49:11 +08:00 committed by Tejun Heo
parent c3138f3881
commit c5178e6ca6
1 changed files with 3 additions and 3 deletions

6
kernel/workqueue.c

@ -5681,9 +5681,6 @@ struct workqueue_struct *alloc_workqueue(const char *fmt,
if (alloc_and_link_pwqs(wq) < 0)
goto err_free_node_nr_active;
if (wq_online && init_rescuer(wq) < 0)
goto err_destroy;
/*
* wq_pool_mutex protects global freeze state and workqueues list.
* Grab it, adjust max_active and add the new @wq to workqueues
@ -5699,6 +5696,9 @@ struct workqueue_struct *alloc_workqueue(const char *fmt,
mutex_unlock(&wq_pool_mutex);
if (wq_online && init_rescuer(wq) < 0)
goto err_destroy;
if ((wq->flags & WQ_SYSFS) && workqueue_sysfs_register(wq))
goto err_destroy;