1 files changed, 11 insertions, 3 deletions

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 5ca7ce9ce754..e3378e8d3a5c 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1291,8 +1291,14 @@ __acquires(&gcwq->lock)
                         return true;
                 spin_unlock_irq(&gcwq->lock);
 
-                /* CPU has come up inbetween, retry migration */
+                /*
+                 * We've raced with CPU hot[un]plug.  Give it a breather
+                 * and retry migration.  cond_resched() is required here;
+                 * otherwise, we might deadlock against cpu_stop trying to
+                 * bring down the CPU on non-preemptive kernel.
+                 */
                 cpu_relax();
+                cond_resched();
         }
 }
 
@@ -1366,8 +1372,10 @@ static struct worker *create_worker(struct global_cwq *gcwq, bool bind)
         worker->id = id;
 
         if (!on_unbound_cpu)
-                worker->task = kthread_create(worker_thread, worker,
-                                              "kworker/%u:%d", gcwq->cpu, id);
+                worker->task = kthread_create_on_node(worker_thread,
+                                                      worker,
+                                                      cpu_to_node(gcwq->cpu),
+                                                      "kworker/%u:%d", gcwq->cpu, id);
         else
                 worker->task = kthread_create(worker_thread, worker,
                                               "kworker/u:%d", id);