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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 CE7B6C33CB6 for ; Thu, 23 Jan 2020 09:15:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AE0072467B for ; Thu, 23 Jan 2020 09:15:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726260AbgAWJPr (ORCPT ); Thu, 23 Jan 2020 04:15:47 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:55206 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725785AbgAWJPr (ORCPT ); Thu, 23 Jan 2020 04:15:47 -0500 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 00N9CkBs104384 for ; Thu, 23 Jan 2020 04:15:45 -0500 Received: from e06smtp05.uk.ibm.com (e06smtp05.uk.ibm.com [195.75.94.101]) by mx0a-001b2d01.pphosted.com with ESMTP id 2xp93qn587-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 23 Jan 2020 04:15:45 -0500 Received: from localhost by e06smtp05.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 23 Jan 2020 09:15:38 -0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 00N9FbuE41353368 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 23 Jan 2020 09:15:37 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 831D14C040; Thu, 23 Jan 2020 09:15:37 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 90CD54C04A; Thu, 23 Jan 2020 09:15:35 +0000 (GMT) Received: from [9.124.35.38] (unknown [9.124.35.38]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 23 Jan 2020 09:15:35 +0000 (GMT) Subject: Re: [PATCH v10 7/8] hugetlb_cgroup: Add hugetlb_cgroup reservation tests To: Mina Almasry Cc: mike.kravetz@oracle.com, rientjes@google.com, shakeelb@google.com, shuah@kernel.org, gthelen@google.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, cgroups@vger.kernel.org, aneesh.kumar@linux.vnet.ibm.com References: <20200115012651.228058-1-almasrymina@google.com> <20200115012651.228058-7-almasrymina@google.com> From: Sandipan Das Date: Thu, 23 Jan 2020 14:45:34 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <20200115012651.228058-7-almasrymina@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 20012309-0020-0000-0000-000003A33EF7 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20012309-0021-0000-0000-000021FAD787 Message-Id: <7ce6d59f-fd73-c529-2ad6-edda9937966d@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-23_01:2020-01-23,2020-01-22 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 lowpriorityscore=0 malwarescore=0 mlxlogscore=996 suspectscore=0 impostorscore=0 priorityscore=1501 phishscore=0 adultscore=0 clxscore=1015 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-2001230079 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Hi, On 15/01/20 6:56 am, Mina Almasry wrote: > The tests use both shared and private mapped hugetlb memory, and > monitors the hugetlb usage counter as well as the hugetlb reservation > counter. They test different configurations such as hugetlb memory usage > via hugetlbfs, or MAP_HUGETLB, or shmget/shmat, and with and without > MAP_POPULATE. > > Also add test for hugetlb reservation reparenting, since this is > a subtle issue. > > Signed-off-by: Mina Almasry > For powerpc64, either 16MB/16GB or 2MB/1GB huge pages are supported depending on the MMU type (Hash or Radix). I was just running these tests on a powerpc64 system with Hash MMU and ran into problems because the tests assume that the hugepage size is always 2MB. Can you determine the huge page size at runtime? - Sandipan