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charset="us-ascii" Content-ID: <6D1CE167B8B6C44E84A7360103E1F630@namprd04.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM8PR04MB8037.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 860a6094-9f3d-429c-c11f-08da4adc4796 X-MS-Exchange-CrossTenant-originalarrivaltime: 10 Jun 2022 12:25:18.0357 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 1WDgT+fRRk3hfEwwZm9nkWfk1v5aTxaFsvjzWG3a20l6vqs1JsKpEP7YTf4mz0wXjyRkhxQjV6WuzJ2wI0OKUqTv95Rrt+RDbcId97u/VjI= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR04MB4229 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Jun 10, 2022 / 09:32, Chaitanya Kulkarni wrote: > Shinichiro, >=20 > >=20 > >> #6: nvme/032: Failed at the first run after system reboot. > >> Used QEMU NVME device as TEST_DEV. > >> >=20 > ofcourse we need to fix this issue but can you also > try it with the real H/W ? Hi Chaitanya, thank you for looking into the failures. I have just run the = test case nvme/032 with real NVME device and observed the exactly same symptom a= s QEMU NVME device. FYI, here I quote the kernel WARNING with the real HW. [ 170.567809] run blktests nvme/032 at 2022-06-10 21:19:03 [ 175.771062] nvme nvme0: 8/0/0 default/read/poll queues [ 176.017635] =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=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D [ 176.017637] WARNING: possible circular locking dependency detected [ 176.017639] 5.19.0-rc1+ #1 Not tainted [ 176.017643] ------------------------------------------------------ [ 176.017645] check/1147 is trying to acquire lock: [ 176.017651] ffff888107010cb8 (kn->active#256){++++}-{0:0}, at: kernfs_re= move_by_name_ns+0x90/0xe0 [ 176.017683]=20 but task is already holding lock: [ 176.017685] ffffffff859bbcc8 (pci_rescan_remove_lock){+.+.}-{3:3}, at: p= ci_stop_and_remove_bus_device_locked+0xe/0x30 [ 176.017701]=20 which lock already depends on the new lock. [ 176.017702]=20 the existing dependency chain (in reverse order) is: [ 176.017704]=20 -> #1 (pci_rescan_remove_lock){+.+.}-{3:3}: [ 176.017712] __mutex_lock+0x14c/0x12b0 [ 176.017720] dev_rescan_store+0x93/0xd0 [ 176.017727] kernfs_fop_write_iter+0x351/0x520 [ 176.017732] new_sync_write+0x2cd/0x500 [ 176.017737] vfs_write+0x62c/0x980 [ 176.017742] ksys_write+0xe7/0x1a0 [ 176.017746] do_syscall_64+0x3a/0x80 [ 176.017755] entry_SYSCALL_64_after_hwframe+0x46/0xb0 [ 176.017762]=20 -> #0 (kn->active#256){++++}-{0:0}: [ 176.017770] __lock_acquire+0x2874/0x5510 [ 176.017778] lock_acquire+0x194/0x4f0 [ 176.017782] __kernfs_remove+0x6f2/0x910 [ 176.017786] kernfs_remove_by_name_ns+0x90/0xe0 [ 176.017791] remove_files+0x8c/0x1a0 [ 176.017797] sysfs_remove_group+0x77/0x150 [ 176.017802] sysfs_remove_groups+0x4f/0x90 [ 176.017807] device_remove_attrs+0x19e/0x240 [ 176.017812] device_del+0x492/0xb60 [ 176.017816] pci_remove_bus_device+0x12c/0x350 [ 176.017821] pci_stop_and_remove_bus_device_locked+0x1e/0x30 [ 176.017826] remove_store+0xab/0xc0 [ 176.017831] kernfs_fop_write_iter+0x351/0x520 [ 176.017836] new_sync_write+0x2cd/0x500 [ 176.017839] vfs_write+0x62c/0x980 [ 176.017844] ksys_write+0xe7/0x1a0 [ 176.017848] do_syscall_64+0x3a/0x80 [ 176.017854] entry_SYSCALL_64_after_hwframe+0x46/0xb0 [ 176.017861]=20 other info that might help us debug this: [ 176.017862] Possible unsafe locking scenario: [ 176.017864] CPU0 CPU1 [ 176.017865] ---- ---- [ 176.017866] lock(pci_rescan_remove_lock); [ 176.017870] lock(kn->active#256); [ 176.017875] lock(pci_rescan_remove_lock); [ 176.017879] lock(kn->active#256); [ 176.017883]=20 *** DEADLOCK *** [ 176.017884] 3 locks held by check/1147: [ 176.017888] #0: ffff888119ad8460 (sb_writers#3){.+.+}-{0:0}, at: ksys_w= rite+0xe7/0x1a0 [ 176.017902] #1: ffff8881241b1888 (&of->mutex){+.+.}-{3:3}, at: kernfs_f= op_write_iter+0x215/0x520 [ 176.017914] #2: ffffffff859bbcc8 (pci_rescan_remove_lock){+.+.}-{3:3}, = at: pci_stop_and_remove_bus_device_locked+0xe/0x30 [ 176.017927]=20 stack backtrace: [ 176.017929] CPU: 7 PID: 1147 Comm: check Not tainted 5.19.0-rc1+ #1 [ 176.017935] Hardware name: Supermicro Super Server/X10SRL-F, BIOS 3.2 11= /22/2019 [ 176.017938] Call Trace: [ 176.017941] [ 176.017945] dump_stack_lvl+0x5b/0x73 [ 176.017953] check_noncircular+0x23e/0x2e0 [ 176.017959] ? lock_chain_count+0x20/0x20 [ 176.017966] ? print_circular_bug+0x1e0/0x1e0 [ 176.017973] ? mark_lock+0xee/0x1600 [ 176.017983] ? lockdep_lock+0xb8/0x1a0 [ 176.017989] ? call_rcu_zapped+0xb0/0xb0 [ 176.017997] __lock_acquire+0x2874/0x5510 [ 176.018012] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 176.018023] lock_acquire+0x194/0x4f0 [ 176.018029] ? kernfs_remove_by_name_ns+0x90/0xe0 [ 176.018037] ? lock_downgrade+0x6b0/0x6b0 [ 176.018048] ? up_write+0x14d/0x460 [ 176.018055] __kernfs_remove+0x6f2/0x910 [ 176.018060] ? kernfs_remove_by_name_ns+0x90/0xe0 [ 176.018071] ? kernfs_next_descendant_post+0x280/0x280 [ 176.018078] ? lock_is_held_type+0xe3/0x140 [ 176.018085] ? kernfs_name_hash+0x16/0xc0 [ 176.018092] ? kernfs_find_ns+0x1e3/0x320 [ 176.018100] kernfs_remove_by_name_ns+0x90/0xe0 [ 176.018107] remove_files+0x8c/0x1a0 [ 176.018115] sysfs_remove_group+0x77/0x150 [ 176.018123] sysfs_remove_groups+0x4f/0x90 [ 176.018131] device_remove_attrs+0x19e/0x240 [ 176.018137] ? device_remove_file+0x20/0x20 [ 176.018146] device_del+0x492/0xb60 [ 176.018154] ? __device_link_del+0x350/0x350 [ 176.018159] ? kfree+0xc5/0x340 [ 176.018171] pci_remove_bus_device+0x12c/0x350 [ 176.018179] pci_stop_and_remove_bus_device_locked+0x1e/0x30 [ 176.018186] remove_store+0xab/0xc0 [ 176.018192] ? subordinate_bus_number_show+0xa0/0xa0 [ 176.018199] ? sysfs_kf_write+0x3d/0x170 [ 176.018207] kernfs_fop_write_iter+0x351/0x520 [ 176.018216] new_sync_write+0x2cd/0x500 [ 176.018223] ? new_sync_read+0x500/0x500 [ 176.018230] ? perf_callchain_user+0x810/0xa90 [ 176.018238] ? lock_downgrade+0x6b0/0x6b0 [ 176.018244] ? inode_security+0x54/0xf0 [ 176.018254] ? lock_is_held_type+0xe3/0x140 [ 176.018264] vfs_write+0x62c/0x980 [ 176.018273] ksys_write+0xe7/0x1a0 [ 176.018279] ? __ia32_sys_read+0xa0/0xa0 [ 176.018285] ? syscall_enter_from_user_mode+0x20/0x70 [ 176.018294] do_syscall_64+0x3a/0x80 [ 176.018303] entry_SYSCALL_64_after_hwframe+0x46/0xb0 [ 176.018310] RIP: 0033:0x7fd59a901c17 [ 176.018317] Code: 0f 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f = 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48= > 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24 [ 176.018322] RSP: 002b:00007fffe29bbe98 EFLAGS: 00000246 ORIG_RAX: 000000= 0000000001 [ 176.018328] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd59a9= 01c17 [ 176.018333] RDX: 0000000000000002 RSI: 0000555e68a93c20 RDI: 00000000000= 00001 [ 176.018336] RBP: 0000555e68a93c20 R08: 0000000000000000 R09: 00000000000= 00073 [ 176.018339] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000= 00002 [ 176.018342] R13: 00007fd59a9f8780 R14: 0000000000000002 R15: 00007fd59a9= f39e0 [ 176.018356] [ 176.057966] pci 0000:04:00.0: [15b7:5002] type 00 class 0x010802 [ 176.058006] pci 0000:04:00.0: reg 0x10: [mem 0xfb600000-0xfb603fff 64bit= ] [ 176.058059] pci 0000:04:00.0: reg 0x20: [mem 0xfb604000-0xfb6040ff 64bit= ] [ 176.060129] pci 0000:04:00.0: BAR 0: assigned [mem 0xfb600000-0xfb603fff= 64bit] [ 176.060152] pci 0000:04:00.0: BAR 4: assigned [mem 0xfb604000-0xfb6040ff= 64bit] [ 176.061638] nvme nvme0: pci function 0000:04:00.0 [ 176.074114] nvme nvme0: 8/0/0 default/read/poll queues --=20 Shin'ichiro Kawasaki=