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@vger.kernel.org Stefan Metzmacher metze@samba.org Signed-off-by: Jens Axboe axboe@kernel.dk --- fs/io-wq.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/fs/io-wq.c b/fs/io-wq.c index 0a182f1333e8..149fd2f0927e 100644 --- a/fs/io-wq.c +++ b/fs/io-wq.c @@ -676,6 +676,7 @@ static bool create_io_worker(struct io_wq *wq, struct io_wqe *wqe, int index) 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);