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Code Issues Releases Wiki Activity

workqueue: Factorize unbind/rebind_workers() logic 

Later patches will reuse this code, move it into reusable functions.

Signed-off-by: Valentin Schneider <vschneid@redhat.com>
Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Valentin Schneider 2023-01-12 16:14:28 +00:00 committed by Tejun Heo
parent 99c621ef24
commit 793777bc19
1 changed files with 21 additions and 12 deletions
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33
kernel/workqueue.c
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@ -1976,6 +1976,23 @@ fail:
return NULL;
}
static void unbind_worker(struct worker *worker)
{
lockdep_assert_held(&wq_pool_attach_mutex);
kthread_set_per_cpu(worker->task, -1);
if (cpumask_intersects(wq_unbound_cpumask, cpu_active_mask))
WARN_ON_ONCE(set_cpus_allowed_ptr(worker->task, wq_unbound_cpumask) < 0);
else
WARN_ON_ONCE(set_cpus_allowed_ptr(worker->task, cpu_possible_mask) < 0);
}
static void rebind_worker(struct worker *worker, struct worker_pool *pool)
{
kthread_set_per_cpu(worker->task, pool->cpu);
WARN_ON_ONCE(set_cpus_allowed_ptr(worker->task, pool->attrs->cpumask) < 0);
}
/**
* destroy_worker - destroy a workqueue worker
* @worker: worker to be destroyed
@ -5051,13 +5068,8 @@ static void unbind_workers(int cpu)
raw_spin_unlock_irq(&pool->lock);
for_each_pool_worker(worker, pool) {
kthread_set_per_cpu(worker->task, -1);
if (cpumask_intersects(wq_unbound_cpumask, cpu_active_mask))
WARN_ON_ONCE(set_cpus_allowed_ptr(worker->task, wq_unbound_cpumask) < 0);
else
WARN_ON_ONCE(set_cpus_allowed_ptr(worker->task, cpu_possible_mask) < 0);
}
for_each_pool_worker(worker, pool)
unbind_worker(worker);
mutex_unlock(&wq_pool_attach_mutex);
}
@ -5082,11 +5094,8 @@ static void rebind_workers(struct worker_pool *pool)
* of all workers first and then clear UNBOUND. As we're called
* from CPU_ONLINE, the following shouldn't fail.
*/
for_each_pool_worker(worker, pool) {
kthread_set_per_cpu(worker->task, pool->cpu);
WARN_ON_ONCE(set_cpus_allowed_ptr(worker->task,
pool->attrs->cpumask) < 0);
}
for_each_pool_worker(worker, pool)
rebind_worker(worker, pool);
raw_spin_lock_irq(&pool->lock);