From e5136678b1c861ed7d0c985c1acdecd37f949937 Mon Sep 17 00:00:00 2001 From: Marco Crivellari Date: Tue, 30 Dec 2025 15:28:20 +0100 Subject: [PATCH] tracing: Replace use of system_wq with system_dfl_wq This patch continues the effort to refactor workqueue APIs, which has begun with the changes introducing new workqueues and a new alloc_workqueue flag: commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq") commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag") The point of the refactoring is to eventually alter the default behavior of workqueues to become unbound by default so that their workload placement is optimized by the scheduler. Before that to happen after a careful review and conversion of each individual case, workqueue users must be converted to the better named new workqueues with no intended behaviour changes: system_wq -> system_percpu_wq system_unbound_wq -> system_dfl_wq This specific workflow has no benefits being per-cpu, so instead of system_percpu_wq the new unbound workqueue has been used (system_dfl_wq). This way the old obsolete workqueues (system_wq, system_unbound_wq) can be removed in the future. Cc: Lai Jiangshan Cc: Frederic Weisbecker Cc: Sebastian Andrzej Siewior Cc: Michal Hocko Cc: Masami Hiramatsu Cc: Mathieu Desnoyers Link: https://patch.msgid.link/20251230142820.173712-1-marco.crivellari@suse.com Suggested-by: Tejun Heo Signed-off-by: Marco Crivellari Signed-off-by: Steven Rostedt (Google) --- kernel/trace/trace_events_filter.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 385af8405392..7001e34476ee 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -1375,7 +1375,7 @@ static void free_filter_list_tasks(struct rcu_head *rhp) struct filter_head *filter_list = container_of(rhp, struct filter_head, rcu); INIT_RCU_WORK(&filter_list->rwork, free_filter_list_work); - queue_rcu_work(system_wq, &filter_list->rwork); + queue_rcu_work(system_dfl_wq, &filter_list->rwork); } /* -- 2.47.3