From: Michal Koutný Date: Tue, 14 Mar 2023 18:33:32 +0000 (+0100) Subject: io_uring/sqpoll: Do not set PF_NO_SETAFFINITY on sqpoll threads X-Git-Tag: v6.3-rc3~15^2~3 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=a5fc1441af7719e93dc7a638a960befb694ade89;p=tomoyo%2Ftomoyo-test1.git 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 01e68ce08a30 ("io_uring/io-wq: stop setting PF_NO_SETAFFINITY on io-wq workers"). Drop the flag on poll threads too. Fixes: 01e68ce08a30 ("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: Michal Koutný Link: https://lore.kernel.org/r/20230314183332.25834-1-mkoutny@suse.com Signed-off-by: Jens Axboe --- diff --git a/io_uring/sqpoll.c b/io_uring/sqpoll.c index 0119d3f1a556..9db4bc1f521a 100644 --- a/io_uring/sqpoll.c +++ b/io_uring/sqpoll.c @@ -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) {