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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham 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 EECEFC46475 for ; Thu, 25 Oct 2018 18:23:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B3D962082E for ; Thu, 25 Oct 2018 18:23:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B3D962082E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.vnet.ibm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727789AbeJZC5U (ORCPT ); Thu, 25 Oct 2018 22:57:20 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:37074 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727651AbeJZC5T (ORCPT ); Thu, 25 Oct 2018 22:57:19 -0400 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w9PIJD5a040933 for ; Thu, 25 Oct 2018 14:23:27 -0400 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0b-001b2d01.pphosted.com with ESMTP id 2nbg1cs1xm-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 25 Oct 2018 14:23:27 -0400 Received: from localhost by e06smtp01.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 25 Oct 2018 19:23:25 +0100 Received: from b06cxnps4076.portsmouth.uk.ibm.com (9.149.109.198) by e06smtp01.uk.ibm.com (192.168.101.131) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 25 Oct 2018 19:23:20 +0100 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w9PINJo657933892 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 25 Oct 2018 18:23:20 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DA0B711C050; Thu, 25 Oct 2018 18:23:19 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0C10C11C052; Thu, 25 Oct 2018 18:23:18 +0000 (GMT) Received: from linux.vnet.ibm.com (unknown [9.126.150.29]) by d06av25.portsmouth.uk.ibm.com (Postfix) with SMTP; Thu, 25 Oct 2018 18:23:17 +0000 (GMT) Date: Thu, 25 Oct 2018 23:53:17 +0530 From: Srikar Dronamraju To: Peter Zijlstra Cc: Ingo Molnar , LKML , Mel Gorman , Rik van Riel , Yi Wang , zhong.weidong@zte.com.cn, Yi Liu , Frederic Weisbecker , Thomas Gleixner Subject: Re: [PATCH v2] sched/core: Don't mix isolcpus and housekeeping CPUs Reply-To: Srikar Dronamraju References: <1540350169-18581-1-git-send-email-srikar@linux.vnet.ibm.com> <20181024100323.GO3109@worktop.c.hoisthospitality.com> <20181024103002.GB18466@linux.vnet.ibm.com> <20181025000707.GR3109@worktop.c.hoisthospitality.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <20181025000707.GR3109@worktop.c.hoisthospitality.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-TM-AS-GCONF: 00 x-cbid: 18102518-4275-0000-0000-000002D3C2E7 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18102518-4276-0000-0000-000037DFD358 Message-Id: <20181025182317.GE18466@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-10-25_09:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1810250153 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > You can create multiple partitions with cpusets but still have an > unbound task in the root cgroup. That would suffer the exact same > problems. > I probably don't understand this. Even if the child cgroups has cpu_exclusive or sched_load_balance reset, the tasks in root cgroup has access to all cpus in system. Right? -- Thanks and Regards Srikar Dronamraju