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 X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 39189C4338F for ; Mon, 2 Aug 2021 08:43:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 18ECF61057 for ; Mon, 2 Aug 2021 08:43:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232821AbhHBIn4 (ORCPT ); Mon, 2 Aug 2021 04:43:56 -0400 Received: from foss.arm.com ([217.140.110.172]:60140 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232433AbhHBInz (ORCPT ); Mon, 2 Aug 2021 04:43:55 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 97CC311D4; Mon, 2 Aug 2021 01:43:45 -0700 (PDT) Received: from [192.168.1.13] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6CB5F3F719; Mon, 2 Aug 2021 01:43:44 -0700 (PDT) Subject: Re: WARNING: CPU: 112 PID: 2041 at kernel/sched/sched.h:1453 To: Bruno Goncalves Cc: CKI Project , linux-kernel@vger.kernel.org, nathan@kernel.org, Memory Management , linux-arm-kernel@lists.infradead.org References: <1ea2fa5c-ae81-2389-7f02-2227636582e4@arm.com> From: Dietmar Eggemann Message-ID: <972ea6f3-a000-84ee-cde0-7dc0f83d59fd@arm.com> Date: Mon, 2 Aug 2021 10:43:43 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 30/07/2021 17:23, Bruno Goncalves wrote: > On Fri, Jul 30, 2021 at 2:22 PM Dietmar Eggemann > wrote: >> >> On 29/07/2021 16:38, Dietmar Eggemann wrote: >>> On 29/07/2021 14:36, Bruno Goncalves wrote: >>>> On Wed, Jul 28, 2021 at 5:55 PM Dietmar Eggemann >>>> wrote: >>>>> >>>>> On 28/07/2021 15:11, Bruno Goncalves wrote: [...] >> The task causing this seem to be the new `cppc_fie` DL task introduced >> by commit 1eb5dde674f5 "cpufreq: CPPC: Add support for frequency >> invariance" in v5.14-rc1. >> >> With `CONFIG_ACPI_CPPC_CPUFREQ_FIE=y` and schedutil cpufreq governor on >> slow-switching system: >> >> DL task curr=`sugov:X` makes p=`cppc_fie` migrate and since it is in >> `non_contending` state, migrate_task_rq_dl() calls >> >> sub_running_bw()->__sub_running_bw()->cpufreq_update_util()-> >> rq_clock()->assert_clock_updated() >> >> on p. >> >> Can you try this snippet? It should fix it. > > Thank you, I've tried the patch and it fixes the issue. Thanks for testing! Let me send out a proper patch then. 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 X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 06A97C4338F for ; Mon, 2 Aug 2021 08:45:26 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C7CE260F36 for ; Mon, 2 Aug 2021 08:45:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org C7CE260F36 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:Cc:To:Subject:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=5EG6RcJkelE5pkRR93AGidZl67cPnVfd4XkJ100f01g=; b=BU/4qhbQjPuiqIcJXGqkcrQS9E sXHlAu9BIPaVn4eF0uqrzoU4fgN8mU3pFfFpMj/o6/abHnnhQAOrK5BBXV0ezXDBec6zTOXDEjqv7 qfx9kVezNTD8EphtZPtY5LozoCcDK6WDAviB2FrQVKl07TfP2UwPwA+bKqw3Yq/Stwz8zNBamZARZ eZuYUSDQxZqezjvcNYBegRoQ+Tu5pSkRc8uDWG5bJayX3UEnrvBz34GCp1jNM8N4MqEHOTOETGclM ndwa1Jm633x4F6cTf5zW0CHQtkEt8KVwDOhlILKnGOIBIdM6yfJO4TbgPs6+Im5jKzNYPWIgEhxk8 nlFj/E0Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mATYE-00FQvb-Op; Mon, 02 Aug 2021 08:43:58 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mATYA-00FQsH-GA for linux-arm-kernel@lists.infradead.org; Mon, 02 Aug 2021 08:43:55 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 97CC311D4; Mon, 2 Aug 2021 01:43:45 -0700 (PDT) Received: from [192.168.1.13] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6CB5F3F719; Mon, 2 Aug 2021 01:43:44 -0700 (PDT) Subject: Re: WARNING: CPU: 112 PID: 2041 at kernel/sched/sched.h:1453 To: Bruno Goncalves Cc: CKI Project , linux-kernel@vger.kernel.org, nathan@kernel.org, Memory Management , linux-arm-kernel@lists.infradead.org References: <1ea2fa5c-ae81-2389-7f02-2227636582e4@arm.com> From: Dietmar Eggemann Message-ID: <972ea6f3-a000-84ee-cde0-7dc0f83d59fd@arm.com> Date: Mon, 2 Aug 2021 10:43:43 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210802_014354_619258_186705EB X-CRM114-Status: GOOD ( 13.25 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 30/07/2021 17:23, Bruno Goncalves wrote: > On Fri, Jul 30, 2021 at 2:22 PM Dietmar Eggemann > wrote: >> >> On 29/07/2021 16:38, Dietmar Eggemann wrote: >>> On 29/07/2021 14:36, Bruno Goncalves wrote: >>>> On Wed, Jul 28, 2021 at 5:55 PM Dietmar Eggemann >>>> wrote: >>>>> >>>>> On 28/07/2021 15:11, Bruno Goncalves wrote: [...] >> The task causing this seem to be the new `cppc_fie` DL task introduced >> by commit 1eb5dde674f5 "cpufreq: CPPC: Add support for frequency >> invariance" in v5.14-rc1. >> >> With `CONFIG_ACPI_CPPC_CPUFREQ_FIE=y` and schedutil cpufreq governor on >> slow-switching system: >> >> DL task curr=`sugov:X` makes p=`cppc_fie` migrate and since it is in >> `non_contending` state, migrate_task_rq_dl() calls >> >> sub_running_bw()->__sub_running_bw()->cpufreq_update_util()-> >> rq_clock()->assert_clock_updated() >> >> on p. >> >> Can you try this snippet? It should fix it. > > Thank you, I've tried the patch and it fixes the issue. Thanks for testing! Let me send out a proper patch then. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel