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([2601:600:947f:f020:85dc:d2b2:c5ee:e3c4]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4f4d5b4c975sm115870181cf.1.2025.12.26.14.13.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 26 Dec 2025 14:13:29 -0800 (PST) From: Waiman Long X-Google-Original-From: Waiman Long Message-ID: <48f8bff9-178c-4ab7-a8ef-7edba9b0e7bb@redhat.com> Date: Fri, 26 Dec 2025 17:13:25 -0500 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 26/33] kthread: Include kthreadd to the managed affinity list To: Frederic Weisbecker , LKML Cc: =?UTF-8?Q?Michal_Koutn=C3=BD?= , Andrew Morton , Bjorn Helgaas , Catalin Marinas , Chen Ridong , Danilo Krummrich , "David S . Miller" , Eric Dumazet , Gabriele Monaco , Greg Kroah-Hartman , Ingo Molnar , Jakub Kicinski , Jens Axboe , Johannes Weiner , Lai Jiangshan , Marco Crivellari , Michal Hocko , Muchun Song , Paolo Abeni , Peter Zijlstra , Phil Auld , "Rafael J . Wysocki" , Roman Gushchin , Shakeel Butt , Simon Horman , Tejun Heo , Thomas Gleixner , Vlastimil Babka , Will Deacon , 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 References: <20251224134520.33231-1-frederic@kernel.org> <20251224134520.33231-27-frederic@kernel.org> Content-Language: en-US In-Reply-To: <20251224134520.33231-27-frederic@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 12/24/25 8:45 AM, Frederic Weisbecker wrote: > 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 > --- > kernel/kthread.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/kernel/kthread.c b/kernel/kthread.c > index 51c0908d3d02..85ccf5bb17c9 100644 > --- a/kernel/kthread.c > +++ b/kernel/kthread.c > @@ -818,12 +818,13 @@ 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)) Reviewed-by: Waiman Long