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Sat, 26 Feb 2022 01:58:09 +0000 From: Liam Howlett To: Nathan Chancellor CC: Qian Cai , "maple-tree@lists.infradead.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Andrew Morton , Mark Brown Subject: Re: [PATCH v6 00/71] Introducing the Maple Tree Thread-Topic: [PATCH v6 00/71] Introducing the Maple Tree Thread-Index: AQHYInmXxzMTjmF25U+e/3QAVwcn6KyjsEsAgAEA+wCAABTmAIAABoMAgAAlWwCAADGWgA== Date: Sat, 26 Feb 2022 01:58:09 +0000 Message-ID: <20220226015803.h4w6y3doe3om2sbc@revolver> References: <20220215143728.3810954-1-Liam.Howlett@oracle.com> <20220225190846.u4fwebimd5ejfdpd@revolver> <20220225202334.bsw5t3retcchpn2e@revolver> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 63e06240-8074-4a14-debe-08d9f8cb7035 x-ms-traffictypediagnostic: BN8PR10MB3666:EE_ x-microsoft-antispam-prvs: x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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charset="us-ascii" Content-ID: <6B73BE56922565409602D10835C49E3F@namprd10.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BL0PR10MB3011.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 63e06240-8074-4a14-debe-08d9f8cb7035 X-MS-Exchange-CrossTenant-originalarrivaltime: 26 Feb 2022 01:58:09.3326 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: qxpWYcRybDuE3kS5o3caFGwsp7gigClRso8nJH/mzDbhDSKNppzxdYKZPjcDHKhz/8NG2V/0DZia80zmk9/Qzg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN8PR10MB3666 X-Proofpoint-Virus-Version: vendor=nai engine=6300 definitions=10269 signatures=684655 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 malwarescore=0 mlxlogscore=999 adultscore=0 bulkscore=0 phishscore=0 suspectscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202260014 X-Proofpoint-ORIG-GUID: p-21_5Ziu0ekeqoOBKhDI_OOWjZX646W X-Proofpoint-GUID: p-21_5Ziu0ekeqoOBKhDI_OOWjZX646W X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RDNS_NONE,SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Nathan Chancellor [220225 18:00]: > On Fri, Feb 25, 2022 at 03:46:52PM -0500, Qian Cai wrote: > > On Fri, Feb 25, 2022 at 08:23:41PM +0000, Liam Howlett wrote: > > > I just booted an arm64 VM with my build and kasan enabled with no iss= ue. > > > Could you please send me your config file for the build? > >=20 > > On linux-next, I just do: > >=20 > > $ make arch=3Darm64 defconfig debug.config [1] > >=20 > > Then, I just generate some memory pressume into swapping/OOM Killer to > > trigger it. > >=20 > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git= /tree/kernel/configs/debug.config >=20 > Is the stacktrace [1] related to the conflict that Mark encountered [2] > while merging the maple and folio trees? Booting a next-20220223 kernel > on my Raspberry Pi 3 and 4 shows constant NULL pointer dereferences > (just ARCH=3Darm and ARCH=3Darm64 defconfigs) and reverting the folio and > maple tree merges makes everything work properly again. >=20 > [1]: https://lore.kernel.org/r/YhhRrBpXTFolUAKi@qian/ > [2]: https://lore.kernel.org/r/20220224011653.1380557-1-broonie@kernel.or= g/ Maybe? I'm trying to figure out why it's having issues.. I've not been able to reproduce it with just my maple tree branch. Steven Rostedt found a bad commit that has been fixed in either 20220224, I believe [1]. It might be best to try next-20220225 and see if you have better luck if that's an option. [1]: https://lore.kernel.org/linux-fsdevel/f6fb6fd4-dcf2-4326-d25e-9a4a9dad5020@= fb.com/T/#t Thanks, Liam=