From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from stravinsky.debian.org (stravinsky.debian.org [82.195.75.108]) (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 98E0341B8CA for ; Fri, 31 Jul 2026 11:58:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=82.195.75.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785499094; cv=none; b=S5sDn+wv7IS+G935zWn+Vm223+qGTEFeKULXmlDbt7OxrGRgsXMB+cVhuu6FAWXiP2UG43/rC+iRf5dkBSelpZby6n3h89Nd7aRo7ds0BofRgyVZYvX1dnxmeu2iLD8IRpxJy1DgZrs/PC1a5ixwBNe2KYOJ76o7olaShBWxI24= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785499094; c=relaxed/simple; bh=YUfbfimXVo3KDOhpG8Vj1nAnI5XwFIu21QDfZnPF4Lg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=tV6mMl7M35wRDjQh76Mpikym0HF4XXBM0fVvT7E3JH6H+gU6jDwv2XXXP2hJElIpVQVW9reCCDrl1a/SwWl1njno8xkLP3GyfAwfUyrAFEysZXq7M1rPeBuPZ8S4Btl/WydrPEzJTwpkq5cWu5dnR1GJ2J6OVQG0llwX3KPBquw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=debian.org; spf=pass smtp.mailfrom=debian.org; dkim=pass (2048-bit key) header.d=debian.org header.i=@debian.org header.b=R5IY4UEW; arc=none smtp.client-ip=82.195.75.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=debian.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=debian.org header.i=@debian.org header.b="R5IY4UEW" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debian.org; s=smtpauto.stravinsky; h=X-Debian-User:Cc:To:In-Reply-To:References: Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description; bh=DhE0Cq7ezgPKterCbzngN7l9OBBsb9l1Zmy9ANn3EKs=; b=R5IY4UEWNffmlf61YGePT6okzg l/7xVojqBCYpdZecOu4OdWOp/TG3djjE2EuSS5b4C3b6JH87+uFhyLhQYTE3s0eA1HwLEtVTpw1B2 phg9UtU8/oSdqUe32NgLsQ8qIe53WDDkNx71UxXTrtwoX+pHpVbWGifsYP5B+r9IEQ70MmKW0LhfS EYfCFsnPwMwKhodWBsb+uk+R6v9bcfTc7Sn1NU7uu2Wqmn8K30bVXbn28POfPCKypb84CVc8DmycY Q8LxzSLorjpBguxJLG9bN2lhYN/QgefvzwvXNL8irZWIHdEKftUNeTpGSWrMjngnS8iN6ambWN0Dh PxiDt1UQ==; Received: from authenticated-user by stravinsky.debian.org with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from ) id 1wplsR-009zdK-2K; Fri, 31 Jul 2026 11:58:11 +0000 From: Breno Leitao Date: Fri, 31 Jul 2026 04:57:38 -0700 Subject: [PATCH 6/6] workqueue: install per-cpu pwqs at creation for __WQ_PERCPU_POOLS 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: 7bit Message-Id: <20260731-wq-pool-refactor-v1-6-8eaf71cdab5f@debian.org> References: <20260731-wq-pool-refactor-v1-0-8eaf71cdab5f@debian.org> In-Reply-To: <20260731-wq-pool-refactor-v1-0-8eaf71cdab5f@debian.org> To: Tejun Heo , Lai Jiangshan Cc: linux-kernel@vger.kernel.org, Breno Leitao , kernel-team@meta.com, marco.crivellari@suse.com X-Mailer: b4 0.16-dev-d5d98 X-Developer-Signature: v=1; a=openpgp-sha256; l=974; i=leitao@debian.org; h=from:subject:message-id; bh=YUfbfimXVo3KDOhpG8Vj1nAnI5XwFIu21QDfZnPF4Lg=; b=owEBbQKS/ZANAwAIATWjk5/8eHdtAcsmYgBqbI28+PonBHfBpq8QZLXIDXB4JTPfFYXBPfTcs XFxAHUJqROJAjMEAAEIAB0WIQSshTmm6PRnAspKQ5s1o5Of/Hh3bQUCamyNvAAKCRA1o5Of/Hh3 bc4QD/0ZI+3IU9soXazb31CETKciVd4Fbq2FLEm0Pp1lJDnSd11eyGIYmZiCUpNJNxnCr3R4zWe 6/kRdDqHJN7ly7Qelcrua8L4+qx6/iJd5KJbfft5a9iWcxlNzJ2n4jFLvAc87oPyffWFvC5V9LU y5ifnIsFKbYzKiuvMNhOx5ROw51AwWd6HwZ9R4HrahhLQA4THW7Gjv1FTST0x56pcey/SvytPwr f2kgk1fB2jyTjkgSMbG+3ZDcIOLuZ3thHvRk9V/6DeSo99JkvqAtsiK2qOkD0n43zQIwXwsg2FV AdGrY/95TMLVlwDRJ/kOsEzWc68mjAGOvPg3PlkyySiI/9QxehrBH0itl1B5mdjPv0qPP3N5Sca V6Zugylyshrq0lSqeY50RulSYF9Dgp62DXG0YhD1+mag589bQMPMfcm2YWjZlMeZA9QtVC/uP43 xqQHrB0fpEe3NuMtH0jIOTkDfxobw3eohYahqL6LPRjFJnVBPVx6MT4FJolKjOODHheKppmpzhi 5+IW3ZdtpP0hgC5yqTznYHxY3Om/eW3s3BGJVu4bPbQPvNFBajn7XRGgZ0ElS0IP1lwNMxNhLq5 q0wG16Bo/6+K1i9WhMQcoAATTnyymP6a+KL2YKzwadeLr80EAkPyVvdiqdbskzZXwJXUOrZnCXU jljC5hkEa/DgoLQ== X-Developer-Key: i=leitao@debian.org; a=openpgp; fpr=AC8539A6E8F46702CA4A439B35A3939FFC78776D X-Debian-User: leitao alloc_and_link_pwqs() brings up an unbound workqueue with dedicated unbound pools. For a workqueue that requests the per-cpu backend, convert those pwqs to per-cpu-backed ones right after creation by running the per-CPU update, so the backend is in place before the workqueue is used rather than only after the first CPU hotplug event. No workqueue sets __WQ_PERCPU_POOLS yet, so there is no functional change. Signed-off-by: Breno Leitao --- kernel/workqueue.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index df4fc9ccb7b22..cd3d0d54dfddc 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -5766,6 +5766,12 @@ static int alloc_and_link_pwqs(struct workqueue_struct *wq) if (ret) goto enomem; + + if (wq->flags & __WQ_PERCPU_POOLS) { + for_each_possible_cpu(cpu) + unbound_wq_update_pwq(wq, cpu); + } + return 0; enomem: -- 2.53.0-Meta