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Commit 40c17f75 authored by Tejun Heo's avatar Tejun Heo
Browse files

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: default avatarTejun Heo <tj@kernel.org>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
parent 983c7515

kernel/workqueue.c

+8 −2
Original line number Diff line number Diff line
@@ -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);