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Wed, 17 Jul 2024 07:52:58 GMT Received: from smtprelay06.fra02v.mail.ibm.com ([9.218.2.230]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 40dwkmk4sd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 17 Jul 2024 07:52:58 +0000 Received: from smtpav06.fra02v.mail.ibm.com (smtpav06.fra02v.mail.ibm.com [10.20.54.105]) by smtprelay06.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 46H7qq4W27001466 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 17 Jul 2024 07:52:54 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AE23B2004B; Wed, 17 Jul 2024 07:52:52 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9FE1820040; Wed, 17 Jul 2024 07:52:51 +0000 (GMT) Received: from [9.171.6.148] (unknown [9.171.6.148]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 17 Jul 2024 07:52:51 +0000 (GMT) Message-ID: <3acefad9-96e5-4681-8014-827d6be71c7a@linux.ibm.com> Date: Wed, 17 Jul 2024 09:52:51 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [linux-next:master] [mm/hugetlb_vmemmap] 875fa64577: vm-scalability.throughput -34.3% regression To: Yu Zhao Cc: oe-lkp@lists.linux.dev, lkp@intel.com, Linux Memory Management List , Andrew Morton , Muchun Song , David Hildenbrand , Frank van der Linden , Matthew Wilcox , Peter Xu , Yang Shi , linux-kernel@vger.kernel.org, ying.huang@intel.com, feng.tang@intel.com, fengwei.yin@intel.com, Christian Borntraeger , Claudio Imbrenda , Marc Hartmayer , Heiko Carstens References: <202407091001.1250ad4a-oliver.sang@intel.com> Content-Language: en-US From: Janosch Frank Autocrypt: addr=frankja@linux.ibm.com; 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charset=UTF-8; format=flowed X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: WpRHZNUOp-d1yiemm_h1X64chn01kdDW X-Proofpoint-GUID: F44QKF79l9BXAn0yGTHmj6MWJPGMRfYe Content-Transfer-Encoding: 7bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-17_04,2024-07-16_02,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 phishscore=0 mlxscore=0 bulkscore=0 adultscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1011 malwarescore=0 mlxlogscore=569 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2407170059 X-Stat-Signature: mjuogq1nxifw5q1x5o7q3fh61bcgne81 X-Rspamd-Queue-Id: 2D2BA180002 X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1721203046-441739 X-HE-Meta: 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 eLtzOp7p ZKJI4G3KO0afZ3EM3loXng3Ekw6mb9Jw6QkqtM5kBtscqYp6PHrJ1fPCI6KeZCZKWL3mQ7nty/bxtG10krbDsviAnYoMC/P+7VKLKq5WxwZ2DGw0Qgt/taQO/AM/H50ofCgS3imaIl0oXkp8S0T1bZTQqQEt/3JGMsEqgN25olfWZPuCxWJEFF3QeshDij8GGixK8tYMugIoYDTN1jJtmZaD+a7Kn77fBpmexDtqGUuMpIZubySED6rx0n+i4Fv9L2GGUYc4n3lvZY8cKgL6cR68N3U8/2Qy4224OzA0VvKpwmRtbv2FQqMQjjGvqDTLZcWH7gt1HvhAaxRYKdq4m7lXvOFERR5MmZfz1iQXiqHROgdnzGS9SAd7XbeGKQhMSsB4tGapKjyOG7J4= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 7/9/24 07:11, kernel test robot wrote: > Hello, > > kernel test robot noticed a -34.3% regression of vm-scalability.throughput on: > > > commit: 875fa64577da9bc8e9963ee14fef8433f20653e7 ("mm/hugetlb_vmemmap: fix race with speculative PFN walkers") > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master > > [still regression on linux-next/master 0b58e108042b0ed28a71cd7edf5175999955b233] > This has hit s390 huge page backed KVM guests as well. Our simple start/stop test case went from ~5 to over 50 seconds of runtime.