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Commit 477a3c33 authored by Tejun Heo's avatar Tejun Heo
Browse files

workqueue: fix GCWQ_DISASSOCIATED initialization 



init_workqueues() incorrectly marks workqueues for all possible CPUs
associated.  Combined with mayday_mask initialization bug, this can
make rescuers keep trying to bind to an offline gcwq indefinitely.
Fix init_workqueues() such that only online CPUs have their gcwqs have
GCWQ_DISASSOCIATED cleared.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Reported-by: default avatarCAI Qian <caiqian@redhat.com>
parent 7c38875a

kernel/workqueue.c

+3 −2
Original line number Diff line number Diff line
@@ -3558,7 +3558,6 @@ static int __init init_workqueues(void) 
		spin_lock_init(&gcwq->lock);

		INIT_LIST_HEAD(&gcwq->worklist);

		gcwq->cpu = cpu;

		if (cpu == WORK_CPU_UNBOUND)

		gcwq->flags |= GCWQ_DISASSOCIATED;



		INIT_LIST_HEAD(&gcwq->idle_list);
@@ -3583,6 +3582,8 @@ static int __init init_workqueues(void) 
		struct global_cwq *gcwq = get_gcwq(cpu);

		struct worker *worker;



		if (cpu != WORK_CPU_UNBOUND)

			gcwq->flags &= ~GCWQ_DISASSOCIATED;

		worker = create_worker(gcwq, true);

		BUG_ON(!worker);

		spin_lock_irq(&gcwq->lock);