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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SJ1PR11MB6129.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: b2c8e2e8-90a5-4788-bb4c-08dca5596b25 X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Jul 2024 05:37:44.8037 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Z1GiLh5uP0WhtURxjMGr/hx7BGOFSCQIzb6+fDI9C+LIPspRLeqf5Nxqnb+O8eevPR2IhSWeXP92fg+bwHd59HrrT/Eo/vvev3q0P53a7Ck= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR11MB7740 X-OriginatorOrg: intel.com X-Stat-Signature: i8jpcr8qzjkd68hqsfubd8ri35bewj65 X-Rspam-User: X-Rspamd-Queue-Id: D8015180016 X-Rspamd-Server: rspam02 X-HE-Tag: 1721108270-454927 X-HE-Meta: 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 Oxonc6TI 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 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: Hello Pei, Hope you are doing well. I am Chaitanya from the linux graphics team in Int= el. This mail is regarding a regression we are seeing in our CI runs[1] on linu= x-next repository. In version next-20240712[2], we saw the following regression (currently bei= ng masked by another regression) ```````````````````````````````````````````````````````````````````````````= `````` <4>[ 14.530533] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D <4>[ 14.530533] WARNING: possible recursive locking detected <4>[ 14.530534] 6.10.0-rc7-next-20240712-next-20240712-g3fe121b62282+ #1 = Not tainted <4>[ 14.530535] -------------------------------------------- <4>[ 14.530535] (direxec)/171 is trying to acquire lock: <4>[ 14.530536] ffff8881010725d8 (&mm->mmap_lock){++++}-{3:3}, at: unmap_= single_vma+0xea/0x170 <4>[ 14.530541]=20 but task is already holding lock: <4>[ 14.530542] ffff8881010725d8 (&mm->mmap_lock){++++}-{3:3}, at: exit_m= map+0x6a/0x450 <4>[ 14.530545]=20 other info that might help us debug this: <4>[ 14.530545] Possible unsafe locking scenario: ```````````````````````````````````````````````````````````````````````````= `````` Details log can be found in [3]. After bisecting the tree, the following patch [4] seems to be the first "ba= d" commit ```````````````````````````````````````````````````````````````````````````= `````````````````````````````` commit a13252049629a8225f38a9be7d8d4fc4ff5350e8 Author: Pei Li mailto:peili.dev@gmail.com Date:=A0=A0 Wed Jul 10 22:13:17 2024 -0700 =A0=A0=A0 mm: fix mmap_assert_locked() in follow_pte() ```````````````````````````````````````````````````````````````````````````= `````````````````````````````` We also verified that if we revert the patch the issue is not seen. Could you please check why the patch causes this regression and provide a f= ix if necessary? Thank you. Regards Chaitanya [1] https://intel-gfx-ci.01.org/tree/linux-next/combined-alt.html? [2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/com= mit/?h=3Dnext-20240712=20 [3] https://gfx-ci.igk.intel.com/tree/linux-next/next-20240712/bat-arlh-2/b= oot0.txt [4] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/com= mit/?h=3Dnext-20240712&id=3Da13252049629a8225f38a9be7d8d4fc4ff5350e8