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

JIRA: https://issues.redhat.com/browse/RHEL-64867

commit 84eacf177faa605853c58e5b1c0d9544b88c16fd
Author: Felix Moessbauer <felix.moessbauer@siemens.com>
Date:   Tue Sep 10 19:11:57 2024 +0200

    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: da64d6db3bd3 ("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: Jeff Moyer <jmoyer@redhat.com>
This commit is contained in:
Jeff Moyer 2024-09-10 19:11:57 +02:00
parent 0e4ba907e4
commit 235624d990
1 changed files with 1 additions and 1 deletions
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io_uring/io-wq.c
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@ -1167,7 +1167,7 @@ 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);