Received: by 2002:ad5:4acb:0:0:0:0:0 with SMTP id n11csp3068065imw; Mon, 11 Jul 2022 00:38:17 -0700 (PDT) X-Google-Smtp-Source: AGRyM1vvz3ixzZd5tsMrpCqxv4fBuP4M++9SWch4Mq8XEoiSoARq+xVyZsYtDaBU6wZFBp/5V7mn X-Received: by 2002:a17:907:94ca:b0:726:f4de:535b with SMTP id dn10-20020a17090794ca00b00726f4de535bmr17322986ejc.590.1657525097071; Mon, 11 Jul 2022 00:38:17 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1657525097; cv=none; d=google.com; s=arc-20160816; b=P46/83cIxRQtHzOmh7mcMeFWbuMyPlBV5eBAK6YvbXpM71Jvukw8KyANjWquji3rX5 0BoyWclWp7cJUmCLmoNsbNSLbJCzvlYngj4XCCS3Wd1AIZ24m2Tqj9m3Dxu4yJwSPKYV 8sUeASLa69tosuTALyjPZR1k1ggsH4TowvWb8kDpVDI8BckiN5RhnFbhB+v584CXorGl 8QbxeL9Z4bR0cH4TVHPfZDGHfQhQDaiw2bi9neWRkXlrwDMVFmHQrCTCH9iWmL7hb+VN hCscEcPMpbPIQM9zPV5POGKxiJ5dTiVk+TBCh88MeRpUOe/XUglfyxHVekyVUy8ZVz98 kGrg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:in-reply-to:from :references:cc:to:content-language:subject:user-agent:mime-version :date:message-id; bh=fJNAh5En4FBWThftDLjmkxydOALnCYA00A6pl5y8kLE=; b=rn23tjK/iOGwc41vqOvweqBwC28CLk0zx8kc8940EtCR7/xcLj76YEEDTcb9Pm9RaZ pHdYol5k3KDftwXDILduHlxytZ0zQsZbDahBJ6YCY+KBPBT317kKkjh0cDuIPeG1NABt yHsVVR6wszIfaEfVwBBcCTUrEncPDS025OIU/EdVGlY2OT7GKCMTBdbRNAHaeYQ30knm uu7SmmYS87fttanqtBnIfcV0UzjTlOWqd+tBb+nP6ZZM+cd6Q5QoGQRxoXn+VHqAsPXg J8YTD5mkWwV6GxuPrnPUmwbI7jBEnuJw139MQ0EQt3UNvfeIhKiPhiMopuGimQ/hlgCb GVAw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id dd10-20020a1709069b8a00b006ff17ba1a4dsi10687495ejc.275.2022.07.11.00.37.52; Mon, 11 Jul 2022 00:38:17 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230148AbiGKHco (ORCPT + 99 others); Mon, 11 Jul 2022 03:32:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52436 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229697AbiGKHcn (ORCPT ); Mon, 11 Jul 2022 03:32:43 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id E464B1A39F; Mon, 11 Jul 2022 00:32:42 -0700 (PDT) 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 10DEA176B; Mon, 11 Jul 2022 00:32:43 -0700 (PDT) Received: from [10.57.12.169] (unknown [10.57.12.169]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id CD26F3F70D; Mon, 11 Jul 2022 00:32:39 -0700 (PDT) Message-ID: <9ade9d43-3ed1-1239-f26e-73145856275a@arm.com> Date: Mon, 11 Jul 2022 08:32:38 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: [PATCH] sched/schedutil: Fix deadlock between cpuset and cpu hotplug when using schedutil Content-Language: en-US To: Xuewen Yan , Xuewen Yan Cc: rafael@kernel.org, viresh.kumar@linaro.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, linux-kernel@vger.kernel.org, ke.wang@unisoc.com, xuewyan@foxmail.com, linux-pm@vger.kernel.org References: <20220705123705.764-1-xuewen.yan@unisoc.com> From: Lukasz Luba In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00,NICE_REPLY_A, RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Xuewen, On 7/11/22 08:21, Xuewen Yan wrote: > Hi all > > This deadlock is inevitable, any comment? Could you tell me how to reproduce this? Is there a need of special cgroup setup? Regards, Lukasz