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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: Tejun Heo <tj@kernel.org>
Reported-by: CAI Qian <caiqian@redhat.com>
This commit is contained in:
Tejun Heo 2010-08-31 10:54:35 +02:00
parent 7c38875a0d
commit 477a3c33d1
1 changed files with 3 additions and 2 deletions
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5
kernel/workqueue.c
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@ -3558,8 +3558,7 @@ 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;
gcwq->flags |= GCWQ_DISASSOCIATED;
INIT_LIST_HEAD(&gcwq->idle_list);
for (i = 0; i < BUSY_WORKER_HASH_SIZE; i++)
@ -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);