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-rw-r--r--kernel/kthread.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/kthread.c b/kernel/kthread.c
index c52a05a8ec52..f5dc0b151d61 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -390,10 +390,10 @@ struct task_struct *kthread_create_on_cpu(int (*threadfn)(void *data),
cpu);
if (IS_ERR(p))
return p;
+ kthread_bind(p, cpu);
+ /* CPU hotplug need to bind once again when unparking the thread. */
set_bit(KTHREAD_IS_PER_CPU, &to_kthread(p)->flags);
to_kthread(p)->cpu = cpu;
- /* Park the thread to get it out of TASK_UNINTERRUPTIBLE state */
- kthread_park(p);
return p;
}
@@ -407,6 +407,10 @@ static void __kthread_unpark(struct task_struct *k, struct kthread *kthread)
* which might be about to be cleared.
*/
if (test_and_clear_bit(KTHREAD_IS_PARKED, &kthread->flags)) {
+ /*
+ * Newly created kthread was parked when the CPU was offline.
+ * The binding was lost and we need to set it again.
+ */
if (test_bit(KTHREAD_IS_PER_CPU, &kthread->flags))
__kthread_bind(k, kthread->cpu, TASK_PARKED);
wake_up_state(k, TASK_PARKED);