Commit a5fc1441 authored by Michal Koutný's avatar Michal Koutný Committed by Jens Axboe
Browse files

io_uring/sqpoll: Do not set PF_NO_SETAFFINITY on sqpoll threads 

Users may specify a CPU where the sqpoll thread would run. This may
conflict with cpuset operations because of strict PF_NO_SETAFFINITY
requirement. That flag is unnecessary for polling "kernel" threads, see
the reasoning in commit 01e68ce0 ("io_uring/io-wq: stop setting
PF_NO_SETAFFINITY on io-wq workers"). Drop the flag on poll threads too.

Fixes: 01e68ce0 ("io_uring/io-wq: stop setting PF_NO_SETAFFINITY on io-wq workers")
Link: https://lore.kernel.org/all/20230314162559.pnyxdllzgw7jozgx@blackpad/


Signed-off-by: default avatarMichal Koutný <mkoutny@suse.com>
Link: https://lore.kernel.org/r/20230314183332.25834-1-mkoutny@suse.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent fa780334

io_uring/sqpoll.c

+0 −1
Original line number Diff line number Diff line
@@ -233,7 +233,6 @@ static int io_sq_thread(void *data) 
		set_cpus_allowed_ptr(current, cpumask_of(sqd->sq_cpu));

	else

		set_cpus_allowed_ptr(current, cpu_online_mask);

	current->flags |= PF_NO_SETAFFINITY;



	mutex_lock(&sqd->lock);

	while (1) {