From nobody Sun Feb 8 22:58:21 2026 Received: from mail-wm1-f48.google.com (mail-wm1-f48.google.com [209.85.128.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4107C256C88 for ; Sat, 1 Nov 2025 16:31:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.48 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762014705; cv=none; b=kieAJT7nvRh4BMgqTI9scA+0N0TksC0AwOQUoBrl5YStSb4sLTQtLi5nu4nuuYAYAWmQTh3oGWgFtx+QFaudTZ9bPjs9ozkhrZ94RdbRQ2ndZhZsJbzE+FiQ/a4vC7RdGe1/7kxgQqbab7SPhMEovR4wX1hXtjnpwXALYqd1rQo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762014705; c=relaxed/simple; bh=ahAObGnU0vDJ/JFkZIEyWhKgwaUaUOkuSDA6ht3Gnn0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dLDKIbdVdqnN8WdKmjdRi6O141PyFokbsGjm8VFhPl1slEy+sT7l0h6yynwYDHSbR7gRVPf50E4FsE2cxu09PE1I8Y+pU+BudXU9t5w4hyAjYTTaYZQ9Y/FSDmaBMxEjlIzQaJf8Rah6yXduHYqOQPAneyHdUEiatGoyK0Lwt0Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com; spf=pass smtp.mailfrom=suse.com; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b=Jrvu8Dpv; arc=none smtp.client-ip=209.85.128.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b="Jrvu8Dpv" Received: by mail-wm1-f48.google.com with SMTP id 5b1f17b1804b1-4710a1f9e4cso26087885e9.0 for ; Sat, 01 Nov 2025 09:31:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1762014701; x=1762619501; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=UO8BLo76omficvLZOkllz+k90eYulfRVDXj5KcWWOHQ=; b=Jrvu8DpvpJmJdWlLAkbxhUkqYaY39kHoRjMe3nmKTYzes7cG5SbuUIDy9fCp9kKhqs 2phD+KbDYybUNAXPLOmWYTi/n/Rl9b7JELmIr2xjvPQp9E029ryizDtz3dJpdcqZbvgk iuyaV1BFtJlcPwf3qTQlJ3xidnNLYSv5/YA7wbPNVAAEjjP0gHg/NOaT2xHGPgxUifR6 huInkRjUTYGi8803pXqzszbgyR02Qmop3Ravjzrg+UfH0pAd2mGJcEORRg1WtKdEseDb YrLizbcm2jODLfhl6JM9dUSCTApsrEVcbn2PJSAocinfOU4CtTeFnZYWbHZQD6VLihcg 9PJg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762014701; x=1762619501; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=UO8BLo76omficvLZOkllz+k90eYulfRVDXj5KcWWOHQ=; b=wTpHqI2kYDTWoTlCYvk1WBAkQcdkiEqE4DxkmJPTXrG9tWXxWQgSeC8VHIsLtIG+mO 6kn7g8O5gjtELFE1AS0kEnDm3jAy+7eEAui685Nztrdqt/Z35R0pJ3yVxg9az9a/yAZp +AJ9sfT8cI0WreLt8cm2yqyGbiZJ9tScB75VDt3WkXm4g9xQP6ddeHb51UhnvecJfJb3 pS1iyGJ6jmLfz2VUkji8HMQTmFdzmUM8O82ZY1e2oPG/lWnRAKvu6AvqFKUGfjGJ6Fv/ JpBgT4PfuJj0RWR9ufDkw6vZ8SOgUtmTfNlVEeYvUWfWUEEFbGVfzlyfy09g1mvscHS4 IORA== X-Gm-Message-State: AOJu0Yzwp2kJEH+1v60miPlFIm1SXsePNwShmfn9E7m1SVGWTHzgb/qX KxXTA6mSvPHSavjuj+5vGPAqyne4QxWW5WK/sVgrkFt6EuL77zTyQCRYMWK+lim4Sg+fimgWODM WqqPH X-Gm-Gg: ASbGnctExGhAIXSTQhvj045AkFm42j2NKIJuCxKd1Gnd4HPfS6qkmz/830rdCV8+csa f4tNesXsYV2xOjzfBWjPCUl+UWVoFIt+c+o1wwmJV4bKBSp3xW+rZ+9SFVCgMJ8FSQwH8Go5TBO 3gcwZGfphNOmDfBwQN57dG9GYu02TtZULJu9O1jgwZDT/3IDlKZiaGTInHeueWpPG6RlSrLaNqz +0PzOHZ4zEK700CoMJhWfLUSDgp3l+K3D+P8FFLWyr7fCyp794O3yHbeUaZ7LOAnEXoTqxUydex Oxfb8Y48hfGK7KWOl8Jj2mQerx1B/w+eA1ZOwaiU0P0rxjZzY2c7I22RClrmR9WTj9AIfhIe0FX U6PKSJjRgQgOd/GGEp2w+ZYcvySMXL1UPXrEvjc2HR2XHlpikk0wIzQxSTaTqWGZ2ULml9HIzS8 g0wOROPxuhpYIdaqV2RuPzF9p5ECUUjTviXUY= X-Google-Smtp-Source: AGHT+IGhqxlDi5PsKQEtT2GbrmcEYyIWNPNJ7Q2aowygqH7rpeTAh2rcioL+mbwEHLHEctDCYPi+Xg== X-Received: by 2002:a05:600c:8b8b:b0:46d:5189:3583 with SMTP id 5b1f17b1804b1-477303303e5mr60797365e9.0.1762014701097; Sat, 01 Nov 2025 09:31:41 -0700 (PDT) Received: from localhost.localdomain ([2a00:6d43:105:c401:e307:1a37:2e76:ce91]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4773c394e33sm56742285e9.13.2025.11.01.09.31.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 01 Nov 2025 09:31:40 -0700 (PDT) From: Marco Crivellari To: linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org Cc: Tejun Heo , Lai Jiangshan , Frederic Weisbecker , Sebastian Andrzej Siewior , Marco Crivellari , Michal Hocko , Jason Gunthorpe , Leon Romanovsky Subject: [PATCH 1/5] RDMA/core: RDMA/mlx5: replace use of system_unbound_wq with system_dfl_wq Date: Sat, 1 Nov 2025 17:31:11 +0100 Message-ID: <20251101163121.78400-2-marco.crivellari@suse.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251101163121.78400-1-marco.crivellari@suse.com> References: <20251101163121.78400-1-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-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Currently if a user enqueue a work item using schedule_delayed_work() the used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to schedule_work() that is using system_wq and queue_work(), that makes use again of WORK_CPU_UNBOUND. This lack of consistency cannot be addressed without refactoring the API. system_unbound_wq should be the default workqueue so as not to enforce locality constraints for random work whenever it's not required. Adding system_dfl_wq to encourage its use when unbound work should be used. The old system_unbound_wq will be kept for a few release cycles. Suggested-by: Tejun Heo Signed-off-by: Marco Crivellari --- drivers/infiniband/core/ucma.c | 2 +- drivers/infiniband/hw/mlx5/odp.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c index f86ece701db6..ec3be65a2b88 100644 --- a/drivers/infiniband/core/ucma.c +++ b/drivers/infiniband/core/ucma.c @@ -366,7 +366,7 @@ static int ucma_event_handler(struct rdma_cm_id *cm_id, if (event->event =3D=3D RDMA_CM_EVENT_DEVICE_REMOVAL) { xa_lock(&ctx_table); if (xa_load(&ctx_table, ctx->id) =3D=3D ctx) - queue_work(system_unbound_wq, &ctx->close_work); + queue_work(system_dfl_wq, &ctx->close_work); xa_unlock(&ctx_table); } return 0; diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/= odp.c index 0e8ae85af5a6..6441abdf1f3b 100644 --- a/drivers/infiniband/hw/mlx5/odp.c +++ b/drivers/infiniband/hw/mlx5/odp.c @@ -265,7 +265,7 @@ static void destroy_unused_implicit_child_mr(struct mlx= 5_ib_mr *mr) =20 /* Freeing a MR is a sleeping operation, so bounce to a work queue */ INIT_WORK(&mr->odp_destroy.work, free_implicit_child_mr_work); - queue_work(system_unbound_wq, &mr->odp_destroy.work); + queue_work(system_dfl_wq, &mr->odp_destroy.work); } =20 static bool mlx5_ib_invalidate_range(struct mmu_interval_notifier *mni, @@ -2093,6 +2093,6 @@ int mlx5_ib_advise_mr_prefetch(struct ib_pd *pd, destroy_prefetch_work(work); return rc; } - queue_work(system_unbound_wq, &work->work); + queue_work(system_dfl_wq, &work->work); return 0; } --=20 2.51.0