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 0D65CC433EF for ; Thu, 17 Feb 2022 16:05:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242918AbiBQQGJ (ORCPT ); Thu, 17 Feb 2022 11:06:09 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:38988 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236186AbiBQQGF (ORCPT ); Thu, 17 Feb 2022 11:06:05 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id C853C29C123 for ; Thu, 17 Feb 2022 08:05:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1645113949; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=q8C5mBTF/zQPiu7mRTQ0V1X+3+5OQ4DWAsdzOSei6/I=; b=aGz2r9CCvL3gZau+oayAHsiZRDKFYl+/YH2rMg8Af1bYpwO+pGw5HG0+aoUkzh7CPERB+L okQVUHw8A8ynOUC/zj2yk2GU/lX5a73K4hWAB0/tD13Y/7NYKzHRgOgr47l8sAf2/gUPxg Y2jkWKsLnjc61e+stCJWWumlZoVpdpk= Received: from mail-wr1-f70.google.com (mail-wr1-f70.google.com [209.85.221.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-661-IH-zet-PPmyFWJ1sapNwrQ-1; Thu, 17 Feb 2022 11:05:48 -0500 X-MC-Unique: IH-zet-PPmyFWJ1sapNwrQ-1 Received: by mail-wr1-f70.google.com with SMTP id s22-20020adf9796000000b001e7e75ab581so2447425wrb.23 for ; Thu, 17 Feb 2022 08:05:48 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=q8C5mBTF/zQPiu7mRTQ0V1X+3+5OQ4DWAsdzOSei6/I=; b=wFUNV8C9JgIxIhT9bvSJM9cSxxosyYIFnkLrzjQmpiWtTZG5fC/dw9FU54K0ahh/1V F3LrTE85FUS81AqGgDgymRTseH2uV0JoffWY1fMSSacqz+K0RD7jCPJYIh0H3xe+YX/D Pl0aBF+m9rHCXp1uwlk1BtrswNE6z/AAWRKDEdF2VGaMzua27OFLitwmNyXbHZgRm/eW eHvVFpzMqe8cmVy9bFu2VXEXu380h4wdbv92WgPEhNMrsQc1uS6WACAvRjaWtA37Wnpt vIJZkBOEF1PCvs8Ke6A4aX8187CACmxsScegr7o9ZDzbtSbgzEqAHBAs/SjSODPWynlO qRdg== X-Gm-Message-State: AOAM532txwZk9YCpIVNi0hOgDCPwiqCfTjA6eCZuwstEtrAjOUX9HKTm 0C8uF2HmxHWsdejucPKzM9xZgzn65BCnUok1eFuUVsMgepAQBqupxE9tgakYgIgZJDYjNhUpGz6 Hwd8SZ7/+mTnR X-Received: by 2002:adf:e78a:0:b0:1e6:3524:e135 with SMTP id n10-20020adfe78a000000b001e63524e135mr2961068wrm.601.1645113947653; Thu, 17 Feb 2022 08:05:47 -0800 (PST) X-Google-Smtp-Source: ABdhPJzVqs24c8i2D8Lt4f9Z4iNheHvxgXvMVn69Wevb7xDbVFxS55ujEEr2K1D18VYZWPyWeX53MQ== X-Received: by 2002:adf:e78a:0:b0:1e6:3524:e135 with SMTP id n10-20020adfe78a000000b001e63524e135mr2961045wrm.601.1645113947428; Thu, 17 Feb 2022 08:05:47 -0800 (PST) Received: from ?IPV6:2001:b07:6468:f312:c8dd:75d4:99ab:290a? ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.googlemail.com with ESMTPSA id c17sm1579430wmh.31.2022.02.17.08.05.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 17 Feb 2022 08:05:46 -0800 (PST) Message-ID: <3113f00a-e910-2dfb-479f-268566445630@redhat.com> Date: Thu, 17 Feb 2022 17:05:45 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH v3] KVM: Move VM's worker kthreads back to the original cgroup before exiting. Content-Language: en-US To: kernel test robot , Vipin Sharma , seanjc@google.com Cc: kbuild-all@lists.01.org, mkoutny@suse.com, tj@kernel.org, lizefan.x@bytedance.com, hannes@cmpxchg.org, dmatlack@google.com, jiangshanlai@gmail.com, kvm@vger.kernel.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org References: <20220217061616.3303271-1-vipinsh@google.com> <202202172046.GuW8pHQc-lkp@intel.com> From: Paolo Bonzini In-Reply-To: <202202172046.GuW8pHQc-lkp@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 2/17/22 13:34, kernel test robot wrote: >> 5859 reattach_err = cgroup_attach_task_all(current->real_parent, current); This needs to be within rcu_dereference(). Paolo > 5860 if (reattach_err) { > 5861 kvm_err("%s: cgroup_attach_task_all failed on reattach with err %d\n", > 5862 __func__, reattach_err); > 5863 } > 5864 return err; > 5865 } > 5866 > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org >