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Fri, 13 May 2022 17:00:31 +0000 From: Liam Howlett To: Sven Schnelle CC: Heiko Carstens , Guenter Roeck , Andrew Morton , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] mapletree-vs-khugepaged Thread-Topic: [PATCH] mapletree-vs-khugepaged Thread-Index: AQHYWyROtMkVxK19R0i3Z444SV9CtK0GzcYAgBYshMGAACVRAA== Date: Fri, 13 May 2022 17:00:31 +0000 Message-ID: <20220513165955.mkg5wvfi4dwpzoer@revolver> References: <20220428172040.GA3623323@roeck-us.net> 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: e3e0efa3-a241-4db4-712f-08da350216e6 x-ms-traffictypediagnostic: BL0PR10MB3025:EE_ x-microsoft-antispam-prvs: x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR10MB3022.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230001)(7916004)(366004)(316002)(6506007)(508600001)(8936002)(5660300002)(91956017)(2906002)(66476007)(66946007)(76116006)(66556008)(66446008)(8676002)(64756008)(4326008)(26005)(38100700002)(38070700005)(9686003)(6512007)(33716001)(1076003)(54906003)(86362001)(6486002)(83380400001)(44832011)(186003)(122000001)(71200400001)(6916009)(45080400002);DIR:OUT;SFP:1101; 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charset="us-ascii" Content-ID: <6125B686538586439A8E9C3037DF7D2C@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: SN6PR10MB3022.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: e3e0efa3-a241-4db4-712f-08da350216e6 X-MS-Exchange-CrossTenant-originalarrivaltime: 13 May 2022 17:00:31.6597 (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: TdjUCGnvlMDA7nT8dI6yejru4btoX9FiMP7WA4GhE152LX4k7Tsd2eC3MVX5K9FWIXIkmO5bdqhUEoyjS2d8pQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR10MB3025 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.486,18.0.858 definitions=2022-05-13_06:2022-05-13,2022-05-13 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 phishscore=0 adultscore=0 bulkscore=0 malwarescore=0 mlxscore=0 mlxlogscore=977 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2205130072 X-Proofpoint-GUID: IVYaiYl8l9uvtfs6RhKgOvhXpa2ikQIb X-Proofpoint-ORIG-GUID: IVYaiYl8l9uvtfs6RhKgOvhXpa2ikQIb 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 * Sven Schnelle [220513 10:46]: > Heiko Carstens writes: >=20 > > On Thu, Apr 28, 2022 at 10:20:40AM -0700, Guenter Roeck wrote: > >> On Wed, Apr 27, 2022 at 03:10:45PM -0700, Andrew Morton wrote: > >> > Fix mapletree for patch series "Make khugepaged collapse readonly FS= THP > >> > more consistent", v3. > >> >=20 > >> > Cc: Liam R. Howlett > >> > Signed-off-by: Andrew Morton > >>=20 > >> This patch causes all my sparc64 boot tests to fail. Bisect and crash = logs > >> attached. > >>=20 > >> Guenter > >>=20 .... > > > > FWIW, same on s390 - linux-next is completely broken. Note: I didn't > > bisect, but given that the call trace, and even the failing address > > match, I'm quite confident it is the same reason. > > > > Unable to handle kernel pointer dereference in virtual kernel address s= pace > > Failing address: 0e00000000000000 TEID: 0e00000000000803 > > Fault in home space mode while using kernel ASCE. > > AS:00000000bac44007 R3:00000001ffff0007 S:00000001fffef800 P:0000000000= 00003d > > Oops: 0038 ilc:3 [#1] SMP > > CPU: 3 PID: 79757 Comm: pt_upgrade_race Tainted: G E K 5.1= 8.0-20220428.rc4.git500.bdc61aad77fa.300.fc35.s390x+next #1 > > Hardware name: IBM 2964 NC9 702 (z/VM 6.4.0) > > Krnl PSW : 0704c00180000000 00000000b912c9a2 (mmap_region+0x1a2/0x8a8) > > R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 RI:0 EA:3 > > Krnl GPRS: 0000000000000000 0e00000000000000 0000000000000000 000000000= 0000000 > > ffffffffffffffff 000000000000000f 00000380016b3d98 000008000= 0100000 > > 000000008364c100 0000080000000000 0000000000100077 0e0000000= 0000000 > > 00000000909da100 00000380016b3c58 00000000b912c982 000003800= 16b3b40 > > Krnl Code: 00000000b912c992: a774002c brc 7,00000000b912c9= ea > > 00000000b912c996: ecb80225007c cgij %r11,0,8,0000000= 0b912cde0 > > #00000000b912c99c: e310f0f80004 lg %r1,248(%r15) > > >00000000b912c9a2: e37010000020 cg %r7,0(%r1) > > 00000000b912c9a8: a784010b brc 8,00000000b912cb= be > > 00000000b912c9ac: e310f0e80004 lg %r1,232(%r15) > > 00000000b912c9b2: ec180013007c cgij %r1,0,8,00000000= b912c9d8 > > 00000000b912c9b8: e310f0e80004 lg %r1,232(%r15) > > Call Trace: > > [<00000000b912c9a2>] mmap_region+0x1a2/0x8a8 > > ([<00000000b912c982>] mmap_region+0x182/0x8a8) > > [<00000000b912d492>] do_mmap+0x3ea/0x4c8 > > [<00000000b90fb9cc>] vm_mmap_pgoff+0xd4/0x170 > > [<00000000b9129c9a>] ksys_mmap_pgoff+0x62/0x238 > > [<00000000b912a034>] __s390x_sys_old_mmap+0x74/0x98 > > [<00000000b9a78ff8>] __do_syscall+0x1d8/0x200 > > [<00000000b9a872a2>] system_call+0x82/0xb0 > > Last Breaking-Event-Address: > > [<00000000b9b9e678>] __s390_indirect_jump_r14+0x0/0xc > > Kernel panic - not syncing: Fatal exception: panic_on_oops >=20 > Starting today we're still seeing the same crash with linux-next from > (next-20220513): >=20 > [ 211.937897] CPU: 7 PID: 535 Comm: pt_upgrade Not tainted 5.18.0-rc6-11= 648-g76535d42eb53-dirty #732 > [ 211.937902] Unable to handle kernel pointer dereference in virtual ker= nel address space > [ 211.937903] Hardware name: IBM 3906 M04 704 (z/VM 7.1.0) > [ 211.937906] Failing address: 0e00000000000000 TEID: 0e00000000000803 > [ 211.937909] Krnl PSW : 0704c00180000000 0000001ca52f06d6 > [ 211.937910] Fault in home space mode while using kernel ASCE. > [ 211.937917] AS:0000001ca6e24007 R3:0000001fffff0007 S:0000001ffffef800= P:000000000000003d > [ 211.937914] (mmap_region+0x19e/0x848) > [ 211.937929] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 P= M:0 RI:0 EA:3 > [ 211.937939] Krnl GPRS: 0000000000000000 0e00000000000000 0000000000000= 000 0000000000000000 > [ 211.937942] ffffffff00000f0f ffffffffffffffff 0e00000000000= 000 0000040000001000 > [ 211.937945] 0000000083551900 0000040000000000 0000000000000= 0fb 000003800070fc58 > [ 211.937947] 000000008f490000 0000000000000000 0000001ca52f0= 6b6 000003800070fb48 > [ 211.937959] Krnl Code: 0000001ca52f06c6: a7740021 brc 7= ,0000001ca52f0708 > [ 211.937959] 0000001ca52f06ca: ec6801b3007c cgij %= r6,0,8,0000001ca52f0a30 > [ 211.937959] #0000001ca52f06d0: e310f0f80004 lg %= r1,248(%r15) > [ 211.937959] >0000001ca52f06d6: e37010000020 cg %= r7,0(%r1) > [ 211.937959] 0000001ca52f06dc: a78400ea brc 8= ,0000001ca52f08b0 > [ 211.937959] 0000001ca52f06e0: e310f0f00004 lg %= r1,240(%r15) > [ 211.937959] 0000001ca52f06e6: ec180008007c cgij %= r1,0,8,0000001ca52f06f6 > [ 211.937959] 0000001ca52f06ec: e39010080020 cg %= r9,8(%r1) > [ 211.937973] Call Trace: > [ 211.937975] [<0000001ca52f06d6>] mmap_region+0x19e/0x848 > [ 211.937978] ([<0000001ca52f06b6>] mmap_region+0x17e/0x848) > [ 211.937981] [<0000001ca52f116a>] do_mmap+0x3ea/0x4c8 > [ 211.937983] [<0000001ca52bed12>] vm_mmap_pgoff+0xda/0x178 > [ 211.937987] [<0000001ca52ed5ea>] ksys_mmap_pgoff+0x62/0x238 > [ 211.937989] [<0000001ca52ed992>] __s390x_sys_old_mmap+0x7a/0xa0 > [ 211.937993] [<0000001ca5c4ef5c>] __do_syscall+0x1d4/0x200 > [ 211.937999] [<0000001ca5c5d572>] system_call+0x82/0xb0 > [ 211.938002] Last Breaking-Event-Address: > [ 211.938003] [<0000001ca5888616>] mas_prev+0xb6/0xc0 > [ 211.938010] Oops: 0038 ilc:3 [#2] > [ 211.938011] Kernel panic - not syncing: Fatal exception: panic_on_oops > [ 211.938012] SMP > [ 211.938014] Modules linked in: > 07: HCPGIR450W CP entered; disabled wait PSW 00020001 80000000 0000001C > A50679A6 >=20 > IS that issue supposed to be fixed? git bisect pointed me to >=20 > # bad: [76535d42eb53485775a8c54ea85725812b75543f] Merge branch > 'mm-everything' of > git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm >=20 > which isn't really helpful. >=20 > Anything we could help with debugging this? I tested the maple tree on top of the s390 as it was the same crash and it was okay. I haven't tested the mm-everything branch though. Can you test mm-unstable? I'll continue setting up a sparc VM for testing here and test mm-everything on that and the s390 Thanks, Liam=