From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 1978D39659A; Wed, 2 Sep 2026 19:29:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788377362; cv=none; b=UENrOAzhlvaHT/ZOvhvHErE6GiWHWwXw5VswqiWHVU5HcPJZsD1Cc3PViuprQl2rbdngc2kt7OrPMOkggeFE5AkN/TJo8LCUAd537mEKXwir7I6SfHficUW4n2BuMy3GHsgbDmqQvb98JxZ2K4/Oi7Pfbq5v8fY9Es2tzxNmGYU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788377362; c=relaxed/simple; bh=O3TNdnVPoa4rGbmi2tla4aohyiGvRmbOQcuo0rGfqKE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=EWX0gC8+YklMzUSv9qdtcbERiRju0NME/P7cv7An8bnRTFbHMpFTk25hU4j2bG4uPzj9ZuucTggQUq/LLTXcWfgAJFBbZ118J1TpryCge4ZhOB47goPbEQC5hG+vA1yFdyIZw3cCulZ8bDr4ilneNFwlTd8lkj2nZ8TL6lEwvl8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=E3uurmS+; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="E3uurmS+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1BD6B1F00A3E; Wed, 2 Sep 2026 19:29:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788377348; bh=2Zj70FxOcUP0kW1TVIjjFDiwHX+7yaJeILXFSkVDfkg=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=E3uurmS+zQ5o2UMdKcqhYNEqtDL4cYXvdfjzc1/Th6Fmdga4fFHSwKkSGC/P4184P 9YYrX5CF2ACkAo3HbcWmgQisz/QapiAh7M0jjjY5eGOl7bV1z9bdcwjXkkGKvcW4lf NKEWQUnewUMZnbfwtE5abhXRFrknubUX6estY3S6onz4X6Mzt0l0FCzp5vwFpQhRLU 5lTVOsI/AoI5owNfDm2qhRH/5ZvFOu6hxqnE/dAsgPtqfTvXEmVZr5ybWoNIlgv0+p Y2VFLrG9Tc2iLjsydyJh0vk7FUfx4aYIAiClj5sugl3r64GFgnZDwGDPltFsyXPtSF 4PbLJ0bGi87SA== From: Chuck Lever Date: Wed, 02 Sep 2026 15:28:49 -0400 Subject: [PATCH RFC v2 4/8] NFS: Set WQ_SYSFS on nfsiod Precedence: bulk X-Mailing-List: linux-nfs@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: <20260902-performance-v2-4-b71c0c082f9d@kernel.org> References: <20260902-performance-v2-0-b71c0c082f9d@kernel.org> In-Reply-To: <20260902-performance-v2-0-b71c0c082f9d@kernel.org> To: Trond Myklebust , Anna Schumaker , Tejun Heo Cc: Lai Jiangshan , linux-nfs@vger.kernel.org, open list , Chuck Lever X-Mailer: b4 0.16-dev-da966 X-Developer-Signature: v=1; a=openpgp-sha256; l=1001; i=cel@kernel.org; h=from:subject:message-id; bh=O3TNdnVPoa4rGbmi2tla4aohyiGvRmbOQcuo0rGfqKE=; b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBqmHkAaXKA35xguWdIO/e6pfBSBFjxh08mpsOrY N+Y7QYczUmJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaph5AAAKCRAzarMzb2Z/ l8eoD/9A8+juOd72lLi5emkXSQ/DSEoNSJxur07U9V27h6RGDAHhe1Zm9eVrDhAI22QGpQEtG8P FTvduuIaEuclhpLNSV+qTxgFoxJpkdgJrx/oVy0841LYdrVE1wsWcu6nR/MOWhZZ693MGo/U/ct jCk4BmmnIRa5GbotbDXXDU1I8G5z/qV30D2gCdtlhBN36nCDxRXrb3Fr8qtX6t/jrrUQ3QV19wd 5AhCJwYZ3ugMi2aeIvc0UCPv0JH/s/4ieERED2j8Nq9X9e3bPnVEEu0WDGyp3RAo7gM3WpRcAUf gJZMODuji1Usr+TwW8J1qFiqzzbVIDzqmf3Orn+CCLC7iWLou+rpvtp4dla/oACVxp/FzlQyf0D v+6SkQk7rEnusg296fNcv0VvlpglhmN4NyZAo84+iLuqSEi1QdW8Px57JYVDci7NzARHXY8t0SU NXuxLDCl9VN5AaX+FovYU29R8nizd2K4dZ6ogOb4H9EXAhf4sKOZaa9bSlG0j3mdcQBz33/SN3l Nmdfx0vBeZEYM6fc+DxsaQO2Z9fEPclqz+H/pRCgTBKiH3PXVsfC49fS93q+YRF819bDefxI9TI roXhTwPbqr08qnjNDQBlgPHRuleBOjPoRKCUsPzDDn2W3GHoffVNwyV9U31wCyoGS+Afxj07bNN 7C3M7JbCRVB+lRg== X-Developer-Key: i=cel@kernel.org; a=openpgp; fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97 An unbound workqueue's attributes can be changed at run time only through /sys/devices/virtual/workqueue/, and a workqueue appears there only when it is created with WQ_SYSFS. nfsiod is created without it, so its affinity scope cannot be tuned without reloading the nfs module. Create nfsiod with WQ_SYSFS. Signed-off-by: Chuck Lever --- fs/nfs/inode.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 3022454f7698..107a2135029d 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -2619,7 +2619,8 @@ static void nfsiod_stop(void) static int nfsiod_start(void) { dprintk("RPC: creating workqueue nfsiod\n"); - nfsiod_workqueue = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0); + nfsiod_workqueue = alloc_workqueue("nfsiod", + WQ_MEM_RECLAIM | WQ_UNBOUND | WQ_SYSFS, 0); if (nfsiod_workqueue == NULL) return -ENOMEM; #if IS_ENABLED(CONFIG_NFS_LOCALIO) -- 2.55.0