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

[ Upstream commit 84eacf177faa605853c58e5b1c0d9544b88c16fd ]

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: da64d6db3b ("io_uring: One wqe per wq")
Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com>
Link: https://lore.kernel.org/r/20240910171157.166423-3-felix.moessbauer@siemens.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Felix Moessbauer 2024-09-10 19:11:57 +02:00 committed by Greg Kroah-Hartman
parent 7b3a35584d
commit 5740c0fa93
1 changed files with 1 additions and 1 deletions
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io_uring/io-wq.c
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@ -1170,7 +1170,7 @@ 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);