From: Jens Axboe <axboe@xxxxxxxxx> commit a8b595b22d31f83b715511f59012f152a269d83b upstream. There was an assumption that kthread_create_on_node() would properly set NUMA affinities in terms of CPUs allowed, but it doesn't. Make sure we do this when creating an io-wq context on NUMA. Cc: stable@xxxxxxxxxxxxxxx Stefan Metzmacher <metze@xxxxxxxxx> Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/io-wq.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/io-wq.c +++ b/fs/io-wq.c @@ -654,6 +654,7 @@ static bool create_io_worker(struct io_w kfree(worker); return false; } + kthread_bind_mask(worker->task, cpumask_of_node(wqe->node)); raw_spin_lock_irq(&wqe->lock); hlist_nulls_add_head_rcu(&worker->nulls_node, &wqe->free_list);
