mutex_lock(&wq_pool_attach_mutex);
/*
- * set_cpus_allowed_ptr() will fail if the cpumask doesn't have any
- * online CPUs. It'll be re-applied when any of the CPUs come up.
- */
- set_cpus_allowed_ptr(worker->task, pool->attrs->cpumask);
-
- /*
* The wq_pool_attach_mutex ensures %POOL_DISASSOCIATED remains
* stable across this function. See the comments above the flag
* definition for details.
*/
if (pool->flags & POOL_DISASSOCIATED)
worker->flags |= WORKER_UNBOUND;
+ else
+ kthread_set_per_cpu(worker->task, pool->cpu);
+
+ if (worker->rescue_wq)
+ set_cpus_allowed_ptr(worker->task, pool->attrs->cpumask);
list_add_tail(&worker->node, &pool->workers);
worker->pool = pool;
mutex_lock(&wq_pool_attach_mutex);
+ kthread_set_per_cpu(worker->task, -1);
list_del(&worker->node);
worker->pool = NULL;
raw_spin_unlock_irq(&pool->lock);
- for_each_pool_worker(worker, pool)
- WARN_ON_ONCE(set_cpus_allowed_ptr(worker->task, cpu_active_mask) < 0);
+ for_each_pool_worker(worker, pool) {
+ kthread_set_per_cpu(worker->task, -1);
+ WARN_ON_ONCE(set_cpus_allowed_ptr(worker->task, cpu_possible_mask) < 0);
+ }
mutex_unlock(&wq_pool_attach_mutex);
* 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)
+ 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);
+ }
raw_spin_lock_irq(&pool->lock);