Commit a8b595b2 authored Oct 15, 2020 by Jens Axboe

io-wq: assign NUMA node locality if appropriate



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>

parent 55cbc256

fs/io-wq.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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);

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