From nobody Sat Feb 7 14:53:38 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7D6D9311596 for ; Tue, 27 Jan 2026 15:06:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769526367; cv=none; b=oe9Baie4387HjsXrssOpkl6PVDs5lSSW/AE3ZWzZBk7IB/wqQV97r/NtoXv7RSPd9etO+RlbkooZKAJe7zB+uoQIEVDdp9P0AkE8QlMhmARVVdUE0qgDpb+QZ1375kIbJmax1Oe9sOv2C5HK1B6JmlPs3mAM8s2rG3OxoYXOlFU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769526367; c=relaxed/simple; bh=WvHPZVX/rhYbJEeH9s1HZdUW1pS9qWxVKfHANSpGSD8=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=LE72ann3lAfZ48xWEJ1iGgu48yOc9FOZiUauZWhcUu/SIAegL4/YZuJFDpWf60nunlW3x3TFK5p7jD0xJ8XCVY3DXsbaG6xvqh31GG4qtd/Pd50fKg+joQlsIDEUaQsJ2w8amubZvQV6dlBUvSC8SZgFDrJ8tuVUqbNa4JTOUr0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=q74PEPpt; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="q74PEPpt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F5BBC19422; Tue, 27 Jan 2026 15:06:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769526367; bh=WvHPZVX/rhYbJEeH9s1HZdUW1pS9qWxVKfHANSpGSD8=; h=Date:From:To:Cc:Subject:References:From; b=q74PEPptpJce51Xs3kBqMcvNv4pjUoZcbxkhoYkqpQqsSU7qounJR59wfrkGP6CED UxUQpCNUClwkxk7Ga8sYtfzMkw8le25enjCc1qJAlnOHLx57PlUYn6WMUog3lYvZsf e6vNnDJyVUUEpfQG4UiO3kuV/F3M6S2r4FumhZbnksNMajtXve8CvyeeYEeXV/PFYz CZtXZZftjFnTDwyxof3LeZ9g0XBbPMtMHq5p7tZ7mhUeLuaPnQP7r6uiCc6vP/YryG TenJt8Q3qjKPIqxvIgqW4mnRMr6NrPKXuqJfuskyCQ5sjEPUv3oVwqJgxsawWpnEAw uD8Ei2iqNCztw== Received: from rostedt by gandalf with local (Exim 4.99.1) (envelope-from ) id 1vkkdw-00000000Lc4-0TwR; Tue, 27 Jan 2026 10:06:12 -0500 Message-ID: <20260127150611.962217175@kernel.org> User-Agent: quilt/0.68 Date: Tue, 27 Jan 2026 10:05:59 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Lai Jiangshan , Frederic Weisbecker , Sebastian Andrzej Siewior , Michal Hocko , Tejun Heo , Marco Crivellari Subject: [for-next][PATCH 04/15] tracing: Replace use of system_wq with system_dfl_wq References: <20260127150555.840066272@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Marco Crivellari 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 individ= ual 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@sus= e.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 *r= hp) struct filter_head *filter_list =3D container_of(rhp, struct filter_head,= rcu); =20 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); } =20 /* --=20 2.51.0