From: Frederic Weisbecker <frederic@kernel.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: "Frederic Weisbecker" <frederic@kernel.org>,
"Michal Koutný" <mkoutny@suse.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Danilo Krummrich" <dakr@kernel.org>,
"David S . Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Gabriele Monaco" <gmonaco@redhat.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Ingo Molnar" <mingo@redhat.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Jens Axboe" <axboe@kernel.dk>,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Lai Jiangshan" <jiangshanlai@gmail.com>,
"Marco Crivellari" <marco.crivellari@suse.com>,
"Michal Hocko" <mhocko@suse.com>,
"Muchun Song" <muchun.song@linux.dev>,
"Paolo Abeni" <pabeni@redhat.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Phil Auld" <pauld@redhat.com>,
"Rafael J . Wysocki" <rafael@kernel.org>,
"Roman Gushchin" <roman.gushchin@linux.dev>,
"Shakeel Butt" <shakeel.butt@linux.dev>,
"Simon Horman" <horms@kernel.org>, "Tejun Heo" <tj@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Waiman Long" <longman@redhat.com>,
"Will Deacon" <will@kernel.org>,
cgroups@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-block@vger.kernel.org, linux-mm@kvack.org,
linux-pci@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH 23/31] kthread: Include kthreadd to the managed affinity list
Date: Wed, 5 Nov 2025 22:03:39 +0100 [thread overview]
Message-ID: <20251105210348.35256-24-frederic@kernel.org> (raw)
In-Reply-To: <20251105210348.35256-1-frederic@kernel.org>
The unbound kthreads affinity management performed by cpuset is going to
be imported to the kthread core code for consolidation purposes.
Treat kthreadd just like any other kthread.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
---
kernel/kthread.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/kthread.c b/kernel/kthread.c
index b4794241420f..86abfbc21bb0 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -820,12 +820,13 @@ int kthreadd(void *unused)
/* Setup a clean context for our children to inherit. */
set_task_comm(tsk, comm);
ignore_signals(tsk);
- set_cpus_allowed_ptr(tsk, housekeeping_cpumask(HK_TYPE_KTHREAD));
set_mems_allowed(node_states[N_MEMORY]);
current->flags |= PF_NOFREEZE;
cgroup_init_kthreadd();
+ kthread_affine_node();
+
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
if (list_empty(&kthread_create_list))
--
2.51.0
next prev parent reply other threads:[~2025-11-05 21:07 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-05 21:03 [PATCH 00/31 v4] cpuset/isolation: Honour kthreads preferred affinity Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 01/31] PCI: Prepare to protect against concurrent isolated cpuset change Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 02/31] cpu: Revert "cpu/hotplug: Prevent self deadlock on CPU hot-unplug" Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 03/31] memcg: Prepare to protect against concurrent isolated cpuset change Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 04/31] mm: vmstat: " Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 05/31] sched/isolation: Save boot defined domain flags Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 06/31] cpuset: Convert boot_hk_cpus to use HK_TYPE_DOMAIN_BOOT Frederic Weisbecker
2025-11-06 1:20 ` Chen Ridong
2025-11-05 21:03 ` [PATCH 07/31] driver core: cpu: Convert /sys/devices/system/cpu/isolated " Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 08/31] net: Keep ignoring isolated cpuset change Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 09/31] block: Protect against concurrent " Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 10/31] cpu: Provide lockdep check for CPU hotplug lock write-held Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 11/31] cpuset: Provide lockdep check for cpuset lock held Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 12/31] sched/isolation: Convert housekeeping cpumasks to rcu pointers Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 13/31] cpuset: Update HK_TYPE_DOMAIN cpumask from cpuset Frederic Weisbecker
2025-11-08 9:05 ` Chen Ridong
2025-11-05 21:03 ` [PATCH 14/31] sched/isolation: Flush memcg workqueues on cpuset isolated partition change Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 15/31] sched/isolation: Flush vmstat " Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 16/31] PCI: Flush PCI probe workqueue " Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 17/31] cpuset: Propagate cpuset isolation update to workqueue through housekeeping Frederic Weisbecker
2025-11-06 0:55 ` Chen Ridong
2025-11-05 21:03 ` [PATCH 18/31] cpuset: Remove cpuset_cpu_is_isolated() Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 19/31] sched/isolation: Remove HK_TYPE_TICK test from cpu_is_isolated() Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 20/31] PCI: Remove superfluous HK_TYPE_WQ check Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 21/31] kthread: Refine naming of affinity related fields Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 22/31] kthread: Include unbound kthreads in the managed affinity list Frederic Weisbecker
2025-11-05 21:03 ` Frederic Weisbecker [this message]
2025-11-05 21:03 ` [PATCH 24/31] kthread: Rely on HK_TYPE_DOMAIN for preferred affinity management Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 25/31] sched: Switch the fallback task allowed cpumask to HK_TYPE_DOMAIN Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 26/31] cgroup/cpuset: Fail if isolated and nohz_full don't leave any housekeeping Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 27/31] sched/arm64: Move fallback task cpumask to HK_TYPE_DOMAIN Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 28/31] kthread: Honour kthreads preferred affinity after cpuset changes Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 29/31] kthread: Comment on the purpose and placement of kthread_affine_node() call Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 30/31] kthread: Document kthread_affine_preferred() Frederic Weisbecker
2025-11-05 21:03 ` [PATCH 31/31] doc: Add housekeeping documentation Frederic Weisbecker
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