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HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: rATLtlHaNGPT6bZOprP+54Q0ON/YMZDQbEubjvG/yjTMqbW1v5buk2IH2bY87CRRXkgl6UpW2I4H++69pNWmMg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR11MB7542 X-OriginatorOrg: intel.com Hello, as we understand, the possible_circular_locking_dependency_detected issue is not caused by this commit, but has different Call Trace now. we just make out report FYI what's the WARNING we observed and how it changes in our tests. 97ea9bccfcbe4c97 c158834b223fbfab3a14855ac20 ---------------- --------------------------- fail:runs %reproduction fail:runs | | | 6:12 0% 6:12 dmesg.WARNING:possible_circular_locking_dependency_detected 1:12 -8% :12 dmesg.WARNING:possible_circular_locking_dependency_detected_kern:warn:[#]perf_is_trying_to_acquire_lock:at:console_flush_all_but_task_is_already_holding_lock:at:__report_bad_irq :12 17% 2:12 dmesg.WARNING:possible_circular_locking_dependency_detected_kern:warn:[#]perf_is_trying_to_acquire_lock:at:console_lock_spinning_enable_but_task_is_already_holding_lock:at:__report_bad_irq 5:12 -42% :12 dmesg.WARNING:possible_circular_locking_dependency_detected_kern:warn:[#]swapper_is_trying_to_acquire_lock:at:console_flush_all_but_task_is_already_holding_lock:at:__report_bad_irq :12 33% 4:12 dmesg.WARNING:possible_circular_locking_dependency_detected_kern:warn:[#]swapper_is_trying_to_acquire_lock:at:console_lock_spinning_enable_but_task_is_already_holding_lock:at:__report_bad_irq below full report FYI. kernel test robot noticed "WARNING:possible_circular_locking_dependency_detected_kern:warn:[#]swapper_is_trying_to_acquire_lock:at:console_lock_spinning_enable_but_task_is_already_holding_lock:at:__report_bad_irq" on: commit: c158834b223fbfab3a14855ac203b8d9cddbbefd ("printk: nbcon: Use nbcon consoles in console_flush_all()") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [test failed on linus/master d69eb204c255c35abd9e8cb621484e8074c75eaa] [test failed on linux-next/master 4ac65880ebca1b68495bd8704263b26c050ac010] in testcase: perf-sanity-tests version: with following parameters: perf_compiler: gcc group: group-01 config: x86_64-rhel-9.4-bpf compiler: gcc-12 test machine: 20 threads 1 sockets (Commet Lake) with 16G memory (please refer to attached dmesg/kmsg for entire log/backtrace) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202509051142.70d9ca69-lkp@intel.com The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250905/202509051142.70d9ca69-lkp@intel.com kern :warn : [ 429.466465] ====================================================== kern :warn : [ 429.466466] WARNING: possible circular locking dependency detected kern :warn : [ 429.466467] 6.11.0-rc4-00024-gc158834b223f #1 Not tainted kern :warn : [ 429.466469] ------------------------------------------------------ kern :warn : [ 429.466470] swapper/17/0 is trying to acquire lock: kern :warn : [ 429.466472] ffffffff843933c0 (console_owner){-...}-{0:0}, at: console_lock_spinning_enable+0x5b/0x80 kern :warn : [ 429.466480] but task is already holding lock: kern :warn : [ 429.466480] ffff8881014fe8c0 (&irq_desc_lock_class){-.-.}-{2:2}, at: __report_bad_irq+0x4f/0xe0 kern :warn : [ 429.466487] which lock already depends on the new lock. kern :warn : [ 429.466487] the existing dependency chain (in reverse order) is: kern :warn : [ 429.466488] -> #2 (&irq_desc_lock_class){-.-.}-{2:2}: kern :warn : [ 429.466492] __lock_acquire+0x760/0xf10 kern :warn : [ 429.466495] lock_acquire+0x148/0x3e0 kern :warn : [ 429.466497] _raw_spin_lock_irqsave+0x38/0x60 kern :warn : [ 429.466500] __irq_get_desc_lock+0x60/0xc0 kern :warn : [ 429.466502] __disable_irq_nosync+0x6a/0xf0 kern :warn : [ 429.466505] disable_hardirq+0xe/0x70 kern :warn : [ 429.466507] e1000_netpoll+0x10e/0x210 kern :warn : [ 429.466511] netpoll_poll_dev+0x162/0x210 kern :warn : [ 429.466515] __netpoll_send_skb+0x2a0/0x3c0 kern :warn : [ 429.466518] write_msg+0x11e/0x160 [netconsole] kern :warn : [ 429.466524] console_flush_all+0x534/0x640 kern :warn : [ 429.466526] console_unlock+0x88/0x190 kern :warn : [ 429.466528] vprintk_emit+0x1aa/0x1e0 kern :warn : [ 429.466530] _printk+0xb3/0xe0 kern :warn : [ 429.466534] register_console+0x610/0x7e0 kern :warn : [ 429.466536] dns_resolver_preparse+0xfe/0x760 [dns_resolver] kern :warn : [ 429.466542] do_one_initcall+0xc2/0x400 kern :warn : [ 429.466545] do_init_module+0x13a/0x3e0 kern :warn : [ 429.466548] init_module_from_file+0xcf/0x130 kern :warn : [ 429.466551] idempotent_init_module+0x1b7/0x480 kern :warn : [ 429.466553] __x64_sys_finit_module+0x78/0xd0 kern :warn : [ 429.466555] do_syscall_64+0x8c/0x170 kern :warn : [ 429.466558] entry_SYSCALL_64_after_hwframe+0x76/0x7e kern :warn : [ 429.466562] -> #1 (target_list_lock){-...}-{2:2}: kern :warn : [ 429.466565] __lock_acquire+0x760/0xf10 kern :warn : [ 429.466567] lock_acquire+0x148/0x3e0 kern :warn : [ 429.466570] _raw_spin_lock_irqsave+0x38/0x60 kern :warn : [ 429.466572] write_msg+0x5c/0x160 [netconsole] kern :warn : [ 429.466577] console_flush_all+0x534/0x640 kern :warn : [ 429.466579] console_unlock+0x88/0x190 kern :warn : [ 429.466581] vprintk_emit+0x1aa/0x1e0 kern :warn : [ 429.466583] _printk+0xb3/0xe0 kern :warn : [ 429.466586] register_console+0x610/0x7e0 kern :warn : [ 429.466588] dns_resolver_preparse+0xfe/0x760 [dns_resolver] kern :warn : [ 429.466592] do_one_initcall+0xc2/0x400 kern :warn : [ 429.466595] do_init_module+0x13a/0x3e0 kern :warn : [ 429.466597] init_module_from_file+0xcf/0x130 kern :warn : [ 429.466599] idempotent_init_module+0x1b7/0x480 kern :warn : [ 429.466601] __x64_sys_finit_module+0x78/0xd0 kern :warn : [ 429.466604] do_syscall_64+0x8c/0x170 kern :warn : [ 429.466606] entry_SYSCALL_64_after_hwframe+0x76/0x7e kern :warn : [ 429.466609] -> #0 (console_owner){-...}-{0:0}: kern :warn : [ 429.466612] check_prev_add+0x1b1/0x1270 kern :warn : [ 429.466614] validate_chain+0x69e/0x780 kern :warn : [ 429.466616] __lock_acquire+0x760/0xf10 kern :warn : [ 429.466618] lock_acquire+0x148/0x3e0 kern :warn : [ 429.466621] console_lock_spinning_enable+0x77/0x80 kern :warn : [ 429.466623] console_flush_all+0x3a8/0x640 kern :warn : [ 429.466625] console_unlock+0x88/0x190 kern :warn : [ 429.466627] vprintk_emit+0x1aa/0x1e0 kern :warn : [ 429.466629] _printk+0xb3/0xe0 kern :warn : [ 429.466632] __report_bad_irq+0xab/0xe0 kern :warn : [ 429.466635] note_interrupt+0x3e4/0x450 kern :warn : [ 429.466637] handle_irq_event+0xaf/0xc0 kern :warn : [ 429.466639] handle_fasteoi_irq+0xe2/0x3c0 kern :warn : [ 429.466641] __common_interrupt+0x50/0xf0 kern :warn : [ 429.466643] common_interrupt+0x7a/0xa0 kern :warn : [ 429.466646] asm_common_interrupt+0x22/0x40 kern :warn : [ 429.466649] cpuidle_enter_state+0xd2/0x320 kern :warn : [ 429.466652] cpuidle_enter+0x3c/0x60 kern :warn : [ 429.466654] cpuidle_idle_call+0x166/0x1e0 kern :warn : [ 429.466657] do_idle+0xbc/0x130 kern :warn : [ 429.466660] cpu_startup_entry+0x2f/0x40 kern :warn : [ 429.466663] start_secondary+0x1a4/0x1d0 kern :warn : [ 429.466666] common_startup_64+0x13e/0x141 kern :warn : [ 429.466669] other info that might help us debug this: kern :warn : [ 429.466670] Chain exists of: console_owner --> target_list_lock --> &irq_desc_lock_class kern :warn : [ 429.466674] Possible unsafe locking scenario: kern :warn : [ 429.466675] CPU0 CPU1 kern :warn : [ 429.466675] ---- ---- kern :warn : [ 429.466676] lock(&irq_desc_lock_class); kern :warn : [ 429.466678] lock(target_list_lock); kern :warn : [ 429.466680] lock(&irq_desc_lock_class); kern :warn : [ 429.466682] lock(console_owner); kern :warn : [ 429.466683] *** DEADLOCK *** kern :warn : [ 429.466684] 3 locks held by swapper/17/0: kern :warn : [ 429.466685] #0: ffff8881014fe8c0 (&irq_desc_lock_class){-.-.}-{2:2}, at: __report_bad_irq+0x4f/0xe0 kern :warn : [ 429.466692] #1: ffffffff84a93a20 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x171/0x1e0 kern :warn : [ 429.466697] #2: ffffffff84a93a90 (console_srcu){....}-{0:0}, at: console_flush_all+0x9d/0x640 kern :warn : [ 429.466703] stack backtrace: kern :warn : [ 429.466704] CPU: 17 UID: 0 PID: 0 Comm: swapper/17 Not tainted 6.11.0-rc4-00024-gc158834b223f #1 kern :warn : [ 429.466707] Hardware name: Intel Corporation CometLake Client Platform/CometLake S UDIMM (ERB/CRB), BIOS CMLSFWR1.R00.2212.D00.2104290922 04/29/2021 kern :warn : [ 429.466708] Call Trace: kern :warn : [ 429.466710] kern :warn : [ 429.466711] dump_stack_lvl+0x62/0x90 kern :warn : [ 429.466716] check_noncircular+0x24d/0x290 kern :warn : [ 429.466719] ? __pfx_check_noncircular+0x10/0x10 kern :warn : [ 429.466723] ? jhash+0x1dc/0x250 kern :warn : [ 429.466728] ? __list_add_valid_or_report+0x33/0xc0 kern :warn : [ 429.466732] ? add_chain_block+0x2dc/0x300 kern :warn : [ 429.466737] check_prev_add+0x1b1/0x1270 kern :warn : [ 429.466742] validate_chain+0x69e/0x780 kern :warn : [ 429.466747] ? __pfx_validate_chain+0x10/0x10 kern :warn : [ 429.466750] ? mark_lock+0x8f/0x520 kern :warn : [ 429.466754] __lock_acquire+0x760/0xf10 kern :warn : [ 429.466760] lock_acquire+0x148/0x3e0 kern :warn : [ 429.466763] ? console_lock_spinning_enable+0x5b/0x80 kern :warn : [ 429.466767] ? __pfx_lock_acquire+0x10/0x10 kern :warn : [ 429.466770] ? do_raw_spin_lock+0x10f/0x1b0 kern :warn : [ 429.466774] ? __pfx_do_raw_spin_lock+0x10/0x10 kern :warn : [ 429.466777] ? console_lock_spinning_enable+0x54/0x80 kern :warn : [ 429.466781] console_lock_spinning_enable+0x77/0x80 kern :warn : [ 429.466784] ? console_lock_spinning_enable+0x5b/0x80 kern :warn : [ 429.466786] console_flush_all+0x3a8/0x640 kern :warn : [ 429.466789] ? console_flush_all+0x9d/0x640 kern :warn : [ 429.466792] ? __pfx_console_flush_all+0x10/0x10 kern :warn : [ 429.466796] ? __pfx_lock_acquire+0x10/0x10 kern :warn : [ 429.466798] ? __pfx_do_raw_spin_lock+0x10/0x10 kern :warn : [ 429.466803] console_unlock+0x88/0x190 kern :warn : [ 429.466805] ? __pfx_console_unlock+0x10/0x10 kern :warn : [ 429.466808] ? do_raw_spin_unlock+0x83/0xf0 kern :warn : [ 429.466812] ? __down_trylock_console_sem+0x82/0x90 kern :warn : [ 429.466815] ? vprintk_emit+0x171/0x1e0 kern :warn : [ 429.466818] vprintk_emit+0x1aa/0x1e0 kern :warn : [ 429.466865] _printk+0xb3/0xe0 kern :warn : [ 429.466868] ? __pfx__printk+0x10/0x10 kern :warn : [ 429.466872] ? common_startup_64+0x13e/0x141 kern :warn : [ 429.466876] ? irq_work_claim+0x1e/0x40 kern :warn : [ 429.466896] __report_bad_irq+0xab/0xe0 kern :warn : [ 429.466900] note_interrupt+0x3e4/0x450 kern :warn : [ 429.466904] handle_irq_event+0xaf/0xc0 kern :warn : [ 429.466907] handle_fasteoi_irq+0xe2/0x3c0 kern :warn : [ 429.466911] __common_interrupt+0x50/0xf0 kern :warn : [ 429.466914] common_interrupt+0x7a/0xa0 kern :warn : [ 429.466917] kern :warn : [ 429.466918] kern :warn : [ 429.466919] asm_common_interrupt+0x22/0x40 kern :warn : [ 429.466923] RIP: 0010:cpuidle_enter_state+0xd2/0x320 kern :warn : [ 429.466926] Code: bf ff ff ff ff 49 89 c5 e8 1b 72 9d ff 31 ff e8 b4 89 8b fe 45 84 ff 0f 85 c6 01 00 00 e8 f6 6d 9d ff 84 c0 0f 84 ae 01 00 00 <45> 85 e4 0f 88 2d 01 00 00 4d 63 f4 4c 89 ef 4d 6b fe 68 49 01 ef kern :warn : [ 429.466928] RSP: 0018:ffff8881010bfda8 EFLAGS: 00000202 kern :warn : [ 429.466931] RAX: 000000000066853b RBX: ffffe8ffffc82478 RCX: dffffc0000000000 kern :warn : [ 429.466933] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff829457d5 kern :warn : [ 429.466934] RBP: ffffffff84f2b840 R08: 0000000000000001 R09: 0000000000000001 kern :warn : [ 429.466936] R10: ffffffff854630e7 R11: 0000000000000000 R12: 0000000000000003 kern :warn : [ 429.466938] R13: 00000063f11b8143 R14: 0000000000000003 R15: 0000000000000000 kern :warn : [ 429.466942] ? cpuidle_enter_state+0x285/0x320 kern :warn : [ 429.466945] ? cpuidle_enter_state+0x285/0x320 kern :warn : [ 429.466950] cpuidle_enter+0x3c/0x60 kern :warn : [ 429.466953] cpuidle_idle_call+0x166/0x1e0 kern :warn : [ 429.466957] ? __pfx_cpuidle_idle_call+0x10/0x10 kern :warn : [ 429.466960] ? mark_held_locks+0x24/0x90 kern :warn : [ 429.466963] ? tsc_verify_tsc_adjust+0x77/0x170 kern :warn : [ 429.466967] do_idle+0xbc/0x130 kern :warn : [ 429.466971] cpu_startup_entry+0x2f/0x40 kern :warn : [ 429.466974] start_secondary+0x1a4/0x1d0 kern :warn : [ 429.466978] ? __pfx_start_secondary+0x10/0x10 kern :warn : [ 429.466981] ? startup_64_load_idt+0x93/0xc0 kern :warn : [ 429.466985] common_startup_64+0x13e/0x141 kern :warn : [ 429.466992] -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki