From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 13FFFC83F1B for ; Wed, 30 Aug 2023 19:17:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242588AbjH3TOt (ORCPT ); Wed, 30 Aug 2023 15:14:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39268 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245254AbjH3O5t (ORCPT ); Wed, 30 Aug 2023 10:57:49 -0400 Received: from mail-wm1-x330.google.com (mail-wm1-x330.google.com [IPv6:2a00:1450:4864:20::330]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC49DA3 for ; Wed, 30 Aug 2023 07:57:46 -0700 (PDT) Received: by mail-wm1-x330.google.com with SMTP id 5b1f17b1804b1-401bbfc05fcso50461505e9.3 for ; Wed, 30 Aug 2023 07:57:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1693407465; x=1694012265; darn=vger.kernel.org; h=content-transfer-encoding:subject:from:cc:to:content-language :user-agent:mime-version:date:message-id:from:to:cc:subject:date :message-id:reply-to; bh=oqemnr3YXLcMa00GXyksLgFMXhdfztrwLhDKDDYSTJ4=; b=ouJhoVjAQdLBgsYMKuyS01jYN2b8iyOa1lMIjB5ZUyP6PWOZ35hveqSwjVWZz4bGBM 7rtVKu71lBjU/Fw7T4FMbo32aaQxunfLLv5l8kLONj8MrImEWU6Xc17QtSkfhOT1ZzOL ITbTWviI5jKu6SUNQtKvssbtKf24/PXBWuKcxy93ZGPP0lhAS0wbh8hODEELdGZDfoBH h1JqvYwPGktwtwYagQvmzb9zaF17CviUKKS4L6kMnIKU1iZJQYOj2IY3J+Myuc8cdG3m TS3FBn9Cy9ramvaxYWlSGXiae74hOXW0jFfNNf4jp5a8tj6wQ9PJQTQIki5/fT53pbxa eoag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693407465; x=1694012265; h=content-transfer-encoding:subject:from:cc:to:content-language :user-agent:mime-version:date:message-id:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=oqemnr3YXLcMa00GXyksLgFMXhdfztrwLhDKDDYSTJ4=; b=To1VP+ci2gXbu4uCRpQYcizoxrxt/pUbXfUTf6U4sWupNzKAPAaY1GSjLjgrdjUlEF BpJFs9AErj0jGWHAxB50N8yYvCmbeftuZmDrMVc0mlmA1UTGDD3Rh0JDA0hTg6FfhKYe 4XtBgcJqBO55ELVP/dXCJmeuNCG6T4McZxOFZq8c3ppkLPLWLVuG7Pl0RHhYsB8i74DV ETDla9FXDcUyfl/cKxdEi5j7jdF3OzP/De/INCFhufR+O1STxf7zqe7Vuv2DmBU+bzCi ybhOCP5kjavSbxoaI3YlfXDuskKQV/Le80AW7r01fbvutxRMnB+z37apmdAx503Z2hBq dhNQ== X-Gm-Message-State: AOJu0YzeODPSJemk7ggAqfCUJG51EQbahJ9esKOHsQ7lUHzKKy89RQXH XRFg/xa1nDb46Y1E1mql9GriuwxAjwI= X-Google-Smtp-Source: AGHT+IE23ostgywF83txDTyJigsSGn6/8aW/tM+8D98OYPPjUs8RWBsVm8AtMKVWGgh6HA0TyT7+dg== X-Received: by 2002:a05:600c:289:b0:401:b53e:6c50 with SMTP id 9-20020a05600c028900b00401b53e6c50mr1990260wmk.17.1693407465165; Wed, 30 Aug 2023 07:57:45 -0700 (PDT) Received: from ?IPV6:2a01:c23:b8a0:2d00:c546:f57b:b95d:336a? (dynamic-2a01-0c23-b8a0-2d00-c546-f57b-b95d-336a.c23.pool.telefonica.de. [2a01:c23:b8a0:2d00:c546:f57b:b95d:336a]) by smtp.googlemail.com with ESMTPSA id a14-20020a05600c224e00b003fbe4cecc3bsm2508880wmm.16.2023.08.30.07.57.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 30 Aug 2023 07:57:44 -0700 (PDT) Message-ID: Date: Wed, 30 Aug 2023 16:57:42 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.14.0 Content-Language: en-US To: Tejun Heo Cc: Linux Kernel Mailing List From: Heiner Kallweit Subject: WQ_UNBOUND warning since recent workqueue refactoring Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Recently I started to see the following warning on linux-next and presumably this may be related to the refactoring of the workqueue core code. [ 56.900223] workqueue: output_poll_execute [drm_kms_helper] hogged CPU for >10000us 4 times, consider switching to WQ_UNBOUND [ 56.923226] workqueue: i915_hpd_poll_init_work [i915] hogged CPU for >10000us 4 times, consider switching to WQ_UNBOUND [ 97.860430] workqueue: output_poll_execute [drm_kms_helper] hogged CPU for >10000us 8 times, consider switching to WQ_UNBOUND [ 97.884453] workqueue: i915_hpd_poll_init_work [i915] hogged CPU for >10000us 8 times, consider switching to WQ_UNBOUND Adding WQ_UNBOUND to these queues didn't change the behavior. Maybe relevant: I run the affected system headless.