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From: Felix Moessbauer <[email protected]>
To: [email protected]
Cc: [email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected],
	Felix Moessbauer <[email protected]>
Subject: [PATCH v3 2/2] io_uring/io-wq: inherit cpuset of cgroup in io worker
Date: Tue, 10 Sep 2024 19:11:57 +0200	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

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 <[email protected]>
---
 io_uring/io-wq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/io_uring/io-wq.c b/io_uring/io-wq.c
index c7055a8895d7..a38f36b68060 100644
--- a/io_uring/io-wq.c
+++ b/io_uring/io-wq.c
@@ -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);
-- 
2.39.2


  parent reply	other threads:[~2024-09-10 17:12 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-09-10 17:11 [PATCH v3 0/2] io_uring/io-wq: respect cgroup cpusets Felix Moessbauer
2024-09-10 17:11 ` [PATCH v3 1/2] io_uring/io-wq: do not allow pinning outside of cpuset Felix Moessbauer
2024-09-10 17:11 ` Felix Moessbauer [this message]
2024-09-10 17:42   ` [PATCH v3 2/2] io_uring/io-wq: inherit cpuset of cgroup in io worker Waiman Long
2024-09-11  7:02     ` MOESSBAUER, Felix
2024-09-11 13:28 ` [PATCH v3 0/2] io_uring/io-wq: respect cgroup cpusets Jens Axboe

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