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 B5CD7C00140 for ; Fri, 12 Aug 2022 10:27:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238338AbiHLK1i (ORCPT ); Fri, 12 Aug 2022 06:27:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233867AbiHLK1g (ORCPT ); Fri, 12 Aug 2022 06:27:36 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3DD0A61E2; Fri, 12 Aug 2022 03:27:35 -0700 (PDT) Received: from pps.filterd (m0279863.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 27C8qatH015088; Fri, 12 Aug 2022 10:27:08 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=message-id : date : mime-version : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding; s=qcppdkim1; bh=ZzPNjrNBak90pV4hdaFyMYkL83XF79pJEP5ke2LniWs=; b=V+UW1v4ECFm6kVBHUaix40abLgIczL54Q7Kd7JY3c6gfer9o1SzXeUVW/f1uHyLobVoL MYIAiP+/jSQN46saUHo9WCNe2dpuoaMDwzs3eptgJ+rr8cllQ1phTiCkJR/83W39BXUE mPZ1Vyi+QdH3xgPVW3EqJznVqjUg/pqo3y7rWahf/hP6A8C3v6zKoksY9EER8FR2PSal MuPGNy3VCDZtEEydknqelzw5N6JtHHsGKcvMK91n8e5ilZFOQMEYm8J9DMMRgPre0+fj DO9oWY9NcWW3x1sJRjRQw4Njjy9ojNG0uuVbHxY69Gt371d9E7rcle1wPHShNcMuRABE zQ== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3hwahwhjy2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 12 Aug 2022 10:27:08 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 27CAR7rp027705 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 12 Aug 2022 10:27:07 GMT Received: from [10.216.5.168] (10.80.80.8) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Fri, 12 Aug 2022 03:27:04 -0700 Message-ID: Date: Fri, 12 Aug 2022 15:57:00 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.12.0 Subject: Re: Query regarding deadlock involving cgroup_threadgroup_rwsem and cpu_hotplug_lock Content-Language: en-US To: Tejun Heo CC: Imran Khan , , , , , , , References: <8245b710-8acb-d8e6-7045-99a5f71dad4e@oracle.com> <26d0e4cc-be0e-2c12-6174-dfbb1edb1ed6@oracle.com> <224b19f3-912d-b858-7af4-185b8e55bc66@quicinc.com> From: Mukesh Ojha In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: 2MSKsR2X3Dh5jcDZQrdfa3XQY98QrniE X-Proofpoint-ORIG-GUID: 2MSKsR2X3Dh5jcDZQrdfa3XQY98QrniE X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-12_07,2022-08-11_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 mlxscore=0 spamscore=0 suspectscore=0 clxscore=1011 bulkscore=0 adultscore=0 mlxlogscore=836 malwarescore=0 impostorscore=0 phishscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2208120029 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Tejun, On 7/28/2022 1:03 AM, Tejun Heo wrote: > On Wed, Jul 20, 2022 at 08:05:03AM -1000, Tejun Heo wrote: >> On Wed, Jul 20, 2022 at 05:31:51PM +0530, Mukesh Ojha wrote: >>> Looks like these patches are the fixes. >>> >>> https://lore.kernel.org/all/YtDvN0wJ6CKaEPN8@slm.duckdns.org/#r >>> >>> Would let Tejun confirm this . >> >> Yeah, looks like the same issue. I'll write up a patch later this week / >> early next unless someone beats me to it. > > https://lore.kernel.org/lkml/20220705123705.764-1-xuewen.yan@unisoc.com/ is > the thread with the same issue. Let's follow up there. Since, i am not part of the above thread, is the reason i am commenting here. The original patch of yours [1] and the revert of [2] is fixing the issue and it is also confirmed here [3]. Can we get proper fix merge on your tree? [1] https://lore.kernel.org/lkml/YuGbYCfAG81mZBnN@slm.duckdns.org/ [2] https://lore.kernel.org/all/20220121101210.84926-1-zhangqiao22@huawei.com/ [3] https://lore.kernel.org/lkml/CAB8ipk-72V-bYRfL-VcSRSyXTeQqkBVj+1d5MHSVV5CTar9a0Q@mail.gmail.com/ -Mukesh > > Thanks. > From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mukesh Ojha Subject: Re: Query regarding deadlock involving cgroup_threadgroup_rwsem and cpu_hotplug_lock Date: Fri, 12 Aug 2022 15:57:00 +0530 Message-ID: References: <8245b710-8acb-d8e6-7045-99a5f71dad4e@oracle.com> <26d0e4cc-be0e-2c12-6174-dfbb1edb1ed6@oracle.com> <224b19f3-912d-b858-7af4-185b8e55bc66@quicinc.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=message-id : date : mime-version : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding; s=qcppdkim1; bh=ZzPNjrNBak90pV4hdaFyMYkL83XF79pJEP5ke2LniWs=; b=V+UW1v4ECFm6kVBHUaix40abLgIczL54Q7Kd7JY3c6gfer9o1SzXeUVW/f1uHyLobVoL MYIAiP+/jSQN46saUHo9WCNe2dpuoaMDwzs3eptgJ+rr8cllQ1phTiCkJR/83W39BXUE mPZ1Vyi+QdH3xgPVW3EqJznVqjUg/pqo3y7rWahf/hP6A8C3v6zKoksY9EER8FR2PSal MuPGNy3VCDZtEEydknqelzw5N6JtHHsGKcvMK91n8e5ilZFOQMEYm8J9DMMRgPre0+fj DO9oWY9NcWW3x1sJRjRQw4Njjy9ojNG0uuVbHxY69Gt371d9E7rcle1wPHShNcMuRABE zQ== Content-Language: en-US In-Reply-To: List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Tejun Heo Cc: Imran Khan , lizefan.x-EC8Uxl6Npydl57MIdRCFDg@public.gmane.org, hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org, tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, steven.price-5wv7dgnIgG8@public.gmane.org, peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Hi Tejun, On 7/28/2022 1:03 AM, Tejun Heo wrote: > On Wed, Jul 20, 2022 at 08:05:03AM -1000, Tejun Heo wrote: >> On Wed, Jul 20, 2022 at 05:31:51PM +0530, Mukesh Ojha wrote: >>> Looks like these patches are the fixes. >>> >>> https://lore.kernel.org/all/YtDvN0wJ6CKaEPN8-NiLfg/pYEd1N0TnZuCh8vA@public.gmane.org/#r >>> >>> Would let Tejun confirm this . >> >> Yeah, looks like the same issue. I'll write up a patch later this week / >> early next unless someone beats me to it. > > https://lore.kernel.org/lkml/20220705123705.764-1-xuewen.yan-1tVvrHeaX6nQT0dZR+AlfA@public.gmane.org/ is > the thread with the same issue. Let's follow up there. Since, i am not part of the above thread, is the reason i am commenting here. The original patch of yours [1] and the revert of [2] is fixing the issue and it is also confirmed here [3]. Can we get proper fix merge on your tree? [1] https://lore.kernel.org/lkml/YuGbYCfAG81mZBnN-NiLfg/pYEd1N0TnZuCh8vA@public.gmane.org/ [2] https://lore.kernel.org/all/20220121101210.84926-1-zhangqiao22-hv44wF8Li93QT0dZR+AlfA@public.gmane.org/ [3] https://lore.kernel.org/lkml/CAB8ipk-72V-bYRfL-VcSRSyXTeQqkBVj+1d5MHSVV5CTar9a0Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org/ -Mukesh > > Thanks. >