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 87A7FC43334 for ; Mon, 11 Jul 2022 07:32:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230151AbiGKHco (ORCPT ); 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 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