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IA1PR10MB7309.namprd10.prod.outlook.com (2603:10b6:208:3fe::13) by DS4PPFF3A3AE169.namprd10.prod.outlook.com (2603:10b6:f:fc00::d59) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9388.9; Wed, 3 Dec 2025 17:22:14 +0000 Received: from IA1PR10MB7309.namprd10.prod.outlook.com ([fe80::5f79:36e9:a632:d010]) by IA1PR10MB7309.namprd10.prod.outlook.com ([fe80::5f79:36e9:a632:d010%4]) with mapi id 15.20.9388.003; Wed, 3 Dec 2025 17:22:14 +0000 From: Prakash Sangappa To: "David Hildenbrand (Red Hat)" CC: Lorenzo Stoakes , "Uschakow, Stanislav" , Jann Horn , "linux-mm@kvack.org" , "trix@redhat.com" , "nathan@kernel.org" , "akpm@linux-foundation.org" , "muchun.song@linux.dev" , "mike.kravetz@oracle.com" , Liam Howlett , "osalvador@suse.de" , "vbabka@suse.cz" , "stable@vger.kernel.org" Subject: Re: Bug: Performance regression in 1013af4f585f: mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race Thread-Topic: Bug: Performance regression in 1013af4f585f: mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race Thread-Index: AQHcWjT0tZf0cWosSkehWLbyj0E0c7UQPkUA Date: Wed, 3 Dec 2025 17:22:14 +0000 Message-ID: References: <81d096fb-f2c2-4b26-ab1b-486001ee2cac@lucifer.local> <4ebbd082-86e3-4b86-bb01-6325f300fc9c@lucifer.local> <2bff49c4-6292-446b-9cd4-1563358fe3b4@redhat.com> <0dabc80e-9c68-41be-b936-8c6e55582c79@lucifer.local> <944a09b0-77a6-40c9-8bea-d6b86a438d8a@kernel.org> <1d53ef79-c88c-4c5b-af82-1eb22306993b@lucifer.local> <968d5458-7d2b-4a8d-a2a6-0931cd87898f@kernel.org> <8cab934d-4a56-44aa-b641-bfd7e23bd673@kernel.org> In-Reply-To: <8cab934d-4a56-44aa-b641-bfd7e23bd673@kernel.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3826.700.81.1.3) x-ms-publictraffictype: Email x-ms-traffictypediagnostic: IA1PR10MB7309:EE_|DS4PPFF3A3AE169:EE_ x-ms-office365-filtering-correlation-id: dcdb9a92-7574-42f6-9062-08de32908096 x-ms-exchange-senderadcheck: 1 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