diff options
| author | Marco Crivellari <marco.crivellari@suse.com> | 2025-09-05 11:05:32 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2025-09-13 12:11:06 +0800 |
| commit | b6d02e0e41aa87aaa46b9b995e71a585284c5d27 (patch) | |
| tree | 5a79b80baf8b86562e65eec5c477d74eed6f4292 | |
| parent | a5d71f011ee1f211e437333555fd981e040c146c (diff) | |
padata: replace use of system_unbound_wq with system_dfl_wq
Currently if a user enqueue a work item using schedule_delayed_work() the
used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
schedule_work() that is using system_wq and queue_work(), that makes use
again of WORK_CPU_UNBOUND.
This lack of consistentcy cannot be addressed without refactoring the API.
system_unbound_wq should be the default workqueue so as not to enforce
locality constraints for random work whenever it's not required.
Adding system_dfl_wq to encourage its use when unbound work should be used.
queue_work() / queue_delayed_work() / mod_delayed_work() will now use the
new unbound wq: whether the user still use the old wq a warn will be
printed along with a wq redirect to the new one.
The old system_unbound_wq will be kept for a few release cycles.
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | kernel/padata.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/padata.c b/kernel/padata.c index 833740d75483..d7cc95367209 100644 --- a/kernel/padata.c +++ b/kernel/padata.c @@ -490,9 +490,9 @@ void __init padata_do_multithreaded(struct padata_mt_job *job) do { nid = next_node_in(old_node, node_states[N_CPU]); } while (!atomic_try_cmpxchg(&last_used_nid, &old_node, nid)); - queue_work_node(nid, system_unbound_wq, &pw->pw_work); + queue_work_node(nid, system_dfl_wq, &pw->pw_work); } else { - queue_work(system_unbound_wq, &pw->pw_work); + queue_work(system_dfl_wq, &pw->pw_work); } /* Use the current thread, which saves starting a workqueue worker. */ |