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Mon, 23 Feb 2026 02:23:45 -0800 (PST) Received: from linux.fritz.box.box ([2a00:6d43:105:c401:e307:1a37:2e76:ce91]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-483a31bc0e3sm237342465e9.5.2026.02.23.02.23.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Feb 2026 02:23:45 -0800 (PST) From: Marco Crivellari To: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org Cc: Tejun Heo , Lai Jiangshan , Frederic Weisbecker , Sebastian Andrzej Siewior , Marco Crivellari , Michal Hocko , Christoph Hellwig , Sagi Grimberg , Chaitanya Kulkarni Subject: [PATCH v2 2/3] nvme: add WQ_PERCPU to alloc_workqueue users Date: Mon, 23 Feb 2026 11:23:28 +0100 Message-ID: <20260223102336.108512-3-marco.crivellari@suse.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260223102336.108512-1-marco.crivellari@suse.com> References: <20260223102336.108512-1-marco.crivellari@suse.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable This continues the effort to refactor workqueue APIs, which began with the introduction of new workqueues and a new alloc_workqueue flag in: commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq") commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag") The refactoring is going to alter the default behavior of alloc_workqueue() to be unbound by default. With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND), any alloc_workqueue() caller that doesn=E2=80=99t explicitly specify WQ_UNB= OUND must now use WQ_PERCPU. For more details see the Link tag below. In order to keep alloc_workqueue() behavior identical, explicitly request WQ_PERCPU. Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/ Suggested-by: Tejun Heo Signed-off-by: Marco Crivellari Reviewed-by: Christoph Hellwig --- drivers/nvme/target/core.c | 5 +++-- drivers/nvme/target/tcp.c | 2 +- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index 5e43d0acc86e..376d38b62da2 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -1942,12 +1942,13 @@ static int __init nvmet_init(void) if (!nvmet_bvec_cache) return -ENOMEM; =20 - zbd_wq =3D alloc_workqueue("nvmet-zbd-wq", WQ_MEM_RECLAIM, 0); + zbd_wq =3D alloc_workqueue("nvmet-zbd-wq", WQ_MEM_RECLAIM | WQ_PERCPU, + 0); if (!zbd_wq) goto out_destroy_bvec_cache; =20 buffered_io_wq =3D alloc_workqueue("nvmet-buffered-io-wq", - WQ_MEM_RECLAIM, 0); + WQ_MEM_RECLAIM | WQ_PERCPU, 0); if (!buffered_io_wq) goto out_free_zbd_work_queue; =20 diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index acc71a26733f..4b8b02341ddc 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -2225,7 +2225,7 @@ static int __init nvmet_tcp_init(void) int ret; =20 nvmet_tcp_wq =3D alloc_workqueue("nvmet_tcp_wq", - WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); + WQ_MEM_RECLAIM | WQ_HIGHPRI | WQ_PERCPU, 0); if (!nvmet_tcp_wq) return -ENOMEM; =20 --=20 2.52.0