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author | Marco Crivellari <marco.crivellari@suse.com> | 2025-09-05 11:02:39 +0200 |
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committer | Jens Axboe <axboe@kernel.dk> | 2025-09-10 08:21:02 -0600 |
commit | 8577441d4a9c8fb5c6da1cde31708c3abb8d4cf8 (patch) | |
tree | 473f5a443da46232177f6d5070b5b1e897b264d6 /lib/timerqueue.c | |
parent | 2f076a453f75de691a081c89bce31b530153d53b (diff) |
io_uring: replace use of system_wq with system_percpu_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_wq is a per-CPU worqueue, yet nothing in its name tells about that
CPU affinity constraint, which is very often not required by users. Make
it clear by adding a system_percpu_wq.
queue_work() / queue_delayed_work() mod_delayed_work() will now use the
new per-cpu wq: whether the user still stick on the old name a warn will
be printed along a wq redirect to the new one.
This patch add the new system_percpu_wq except for mm, fs and net
subsystem, whom are handled in separated patches.
The old wq will be kept for a few release cylces.
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'lib/timerqueue.c')
0 files changed, 0 insertions, 0 deletions