Commit 84eacf17 authored by Felix Moessbauer's avatar Felix Moessbauer Committed by Jens Axboe
Browse files

io_uring/io-wq: inherit cpuset of cgroup in io worker 



The io worker threads are userland threads that just never exit to the
userland. By that, they are also assigned to a cgroup (the group of the
creating task).

When creating a new io worker, this worker should inherit the cpuset
of the cgroup.

Fixes: da64d6db ("io_uring: One wqe per wq")
Signed-off-by: default avatarFelix Moessbauer <felix.moessbauer@siemens.com>
Link: https://lore.kernel.org/r/20240910171157.166423-3-felix.moessbauer@siemens.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 0997aa54

io_uring/io-wq.c

+1 −1
Original line number Diff line number Diff line
@@ -1168,7 +1168,7 @@ struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data) 


	if (!alloc_cpumask_var(&wq->cpu_mask, GFP_KERNEL))

		goto err;

	cpumask_copy(wq->cpu_mask, cpu_possible_mask);

	cpuset_cpus_allowed(data->task, wq->cpu_mask);

	wq->acct[IO_WQ_ACCT_BOUND].max_workers = bounded;

	wq->acct[IO_WQ_ACCT_UNBOUND].max_workers =

				task_rlimit(current, RLIMIT_NPROC);