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authorMarco Crivellari <marco.crivellari@suse.com>2025-09-05 11:13:24 +0200
committerTejun Heo <tj@kernel.org>2025-09-05 07:20:00 -1000
commita2be943b46b4a7478ea8ddf9bb8e5251c59fceb7 (patch)
treeb7a0e1b737c41f8ce453ca000c7e52e2857dc106 /rust/helpers/barrier.c
parentf6cfa602d2ba7e5ca9dc65ec4141521aca80bda2 (diff)
workqueue: 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: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'rust/helpers/barrier.c')
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