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Date: Fri, 05 Sep 2014 19:20:59 +0300
From: Kari Suvanto <kari.tj.suvanto@...il.com>
To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: INFO: possible irq lock inversion dependency detected
Hello,
I noticed, with next/master tree, this lockdep splat and at least I could not find any discussion about this by googling:
[ 33.105722] =========================================================
[ 33.105722] [ INFO: possible irq lock inversion dependency detected ]
[ 33.105724] 3.17.0-031700rc3-generic #201409031132 Not tainted
[ 33.105724] ---------------------------------------------------------
[ 33.105725] swapper/0/0 just changed the state of lock:
[ 33.105726] (&(&dev->event_lock)->rlock#2){-.....}, at: [<ffffffff8162f7c5>] input_event+0x45/0x70
[ 33.105733] but this lock took another, HARDIRQ-unsafe lock in the past:
[ 33.105734] (&(&p->alloc_lock)->rlock){+.+...}
[ 33.105734]
[ 33.105734] and interrupts could create inverse lock ordering between them.
[ 33.105734]
[ 33.105736]
[ 33.105736] other info that might help us debug this:
[ 33.105737] Chain exists of:
[ 33.105737] &(&dev->event_lock)->rlock#2 --> &(&client->buffer_lock)->rlock --> &(&p->alloc_lock)->rlock
[ 33.105737]
[ 33.105740] Possible interrupt unsafe locking scenario:
[ 33.105740]
[ 33.105740] CPU0 CPU1
[ 33.105741] ---- ----
[ 33.105742] lock(&(&p->alloc_lock)->rlock);
[ 33.105743] local_irq_disable();
[ 33.105743] lock(&(&dev->event_lock)->rlock#2);
[ 33.105745] lock(&(&client->buffer_lock)->rlock);
[ 33.105746] <Interrupt>
[ 33.105747] lock(&(&dev->event_lock)->rlock#2);
[ 33.105748]
[ 33.105748] *** DEADLOCK ***
[ 33.105748]
[ 33.105749] no locks held by swapper/0/0.
[ 33.105750]
[ 33.105750] the shortest dependencies between 2nd lock and 1st lock:
[ 33.105755] -> (&(&p->alloc_lock)->rlock){+.+...} ops: 30838 {
[ 33.105757] HARDIRQ-ON-W at:
[ 33.105758] [<ffffffff810d3ae8>] __lock_acquire+0x538/0xb50
[ 33.105761] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105763] [<ffffffff818334e9>] _raw_spin_lock+0x39/0x50
[ 33.105766] [<ffffffff81227f0a>] __set_task_comm+0x2a/0x150
[ 33.105769] [<ffffffff810a15c0>] kthreadd+0x30/0x220
[ 33.105772] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 33.105774] SOFTIRQ-ON-W at:
[ 33.105775] [<ffffffff810d38a3>] __lock_acquire+0x2f3/0xb50
[ 33.105776] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105778] [<ffffffff818334e9>] _raw_spin_lock+0x39/0x50
[ 33.105780] [<ffffffff81227f0a>] __set_task_comm+0x2a/0x150
[ 33.105782] [<ffffffff810a15c0>] kthreadd+0x30/0x220
[ 33.105783] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 33.105785] INITIAL USE at:
[ 33.105786] [<ffffffff810d38f4>] __lock_acquire+0x344/0xb50
[ 33.105787] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105789] [<ffffffff818334e9>] _raw_spin_lock+0x39/0x50
[ 33.105791] [<ffffffff81227f0a>] __set_task_comm+0x2a/0x150
[ 33.105792] [<ffffffff810a15c0>] kthreadd+0x30/0x220
[ 33.105794] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 33.105796] }
[ 33.105796] ... key at: [<ffffffff82119008>] __key.51772+0x0/0x8
[ 33.105799] ... acquired at:
[ 33.105799] [<ffffffff810d39c8>] __lock_acquire+0x418/0xb50
[ 33.105801] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105802] [<ffffffff818334e9>] _raw_spin_lock+0x39/0x50
[ 33.105804] [<ffffffff81093eeb>] do_prlimit+0x9b/0x200
[ 33.105806] [<ffffffff8109407a>] SyS_getrlimit+0x2a/0x70
[ 33.105808] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 33.105810]
[ 33.105811] -> (tasklist_lock){.+.+..} ops: 26419 {
[ 33.105813] HARDIRQ-ON-R at:
[ 33.105813] [<ffffffff810d3881>] __lock_acquire+0x2d1/0xb50
[ 33.105815] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105817] [<ffffffff8183382c>] _raw_read_lock+0x3c/0x50
[ 33.105818] [<ffffffff8107d796>] do_wait+0xb6/0x340
[ 33.105820] [<ffffffff8107ed54>] SyS_wait4+0x64/0xe0
[ 33.105822] [<ffffffff8109500b>] wait_for_helper+0x4b/0x70
[ 33.105824] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 33.105825] SOFTIRQ-ON-R at:
[ 33.105826] [<ffffffff810d38a3>] __lock_acquire+0x2f3/0xb50
[ 33.105828] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105829] [<ffffffff8183382c>] _raw_read_lock+0x3c/0x50
[ 33.105831] [<ffffffff8107d796>] do_wait+0xb6/0x340
[ 33.105833] [<ffffffff8107ed54>] SyS_wait4+0x64/0xe0
[ 33.105834] [<ffffffff8109500b>] wait_for_helper+0x4b/0x70
[ 33.105836] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 33.105837] INITIAL USE at:
[ 33.105838] [<ffffffff810d38f4>] __lock_acquire+0x344/0xb50
[ 33.105840] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105842] [<ffffffff81833ba5>] _raw_write_lock_irq+0x45/0x60
[ 33.105843] [<ffffffff81078861>] copy_process.part.23+0xcf1/0x1e50
[ 33.105846] [<ffffffff81079b6e>] do_fork+0xce/0x750
[ 33.105847] [<ffffffff8107a216>] kernel_thread+0x26/0x30
[ 33.105849] [<ffffffff81817bb3>] rest_init+0x23/0x140
[ 33.105851] [<ffffffff81f590ee>] start_kernel+0x499/0x4a4
[ 33.105853] [<ffffffff81f585ee>] x86_64_start_reservations+0x2a/0x2c
[ 33.105855] [<ffffffff81f58733>] x86_64_start_kernel+0x143/0x152
[ 33.105857] }
[ 33.105858] ... key at: [<ffffffff81e0f058>] tasklist_lock+0x18/0x40
[ 33.105860] ... acquired at:
[ 33.105861] [<ffffffff810d39c8>] __lock_acquire+0x418/0xb50
[ 33.105863] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105864] [<ffffffff8183382c>] _raw_read_lock+0x3c/0x50
[ 33.105866] [<ffffffff812342d5>] send_sigio+0x55/0x1d0
[ 33.105868] [<ffffffff8123451c>] kill_fasync+0xcc/0x2a0
[ 33.105870] [<ffffffff81633063>] evdev_pass_values+0xf3/0x1c0
[ 33.105871] [<ffffffff81634bd3>] evdev_events+0x1d3/0x2f0
[ 33.105873] [<ffffffff8162ba77>] input_to_handler+0x97/0xf0
[ 33.105875] [<ffffffff8162e9ac>] input_pass_values.part.6+0x2cc/0x370
[ 33.105876] [<ffffffff8162f361>] input_handle_event+0x121/0x540
[ 33.105878] [<ffffffff8162f988>] input_inject_event+0x198/0x230
[ 33.105880] [<ffffffff8163497c>] evdev_write+0x19c/0x220
[ 33.105881] [<ffffffff812208f7>] vfs_write+0xb7/0x1f0
[ 33.105883] [<ffffffff81221359>] SyS_write+0x49/0xb0
[ 33.105884] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 33.105886]
[ 33.105887] -> (&f->f_owner.lock){......} ops: 8 {
[ 33.105889] INITIAL USE at:
[ 33.105890] [<ffffffff810d38f4>] __lock_acquire+0x344/0xb50
[ 33.105891] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105893] [<ffffffff81833ba5>] _raw_write_lock_irq+0x45/0x60
[ 33.105895] [<ffffffff81233687>] __f_setown+0x47/0xe0
[ 33.105896] [<ffffffff812337bd>] f_setown+0x7d/0x120
[ 33.105897] [<ffffffff81233f01>] SyS_fcntl+0x341/0x6c0
[ 33.105899] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 33.105901] }
[ 33.105901] ... key at: [<ffffffff82e83920>] __key.31233+0x0/0x8
[ 33.105905] ... acquired at:
[ 33.105905] [<ffffffff810d39c8>] __lock_acquire+0x418/0xb50
[ 33.105907] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105908] [<ffffffff8183382c>] _raw_read_lock+0x3c/0x50
[ 33.105910] [<ffffffff812342aa>] send_sigio+0x2a/0x1d0
[ 33.105911] [<ffffffff8123451c>] kill_fasync+0xcc/0x2a0
[ 33.105913] [<ffffffff81633063>] evdev_pass_values+0xf3/0x1c0
[ 33.105914] [<ffffffff81634bd3>] evdev_events+0x1d3/0x2f0
[ 33.105916] [<ffffffff8162ba77>] input_to_handler+0x97/0xf0
[ 33.105918] [<ffffffff8162e9ac>] input_pass_values.part.6+0x2cc/0x370
[ 33.105919] [<ffffffff8162f361>] input_handle_event+0x121/0x540
[ 33.105921] [<ffffffff8162f988>] input_inject_event+0x198/0x230
[ 33.105922] [<ffffffff8163497c>] evdev_write+0x19c/0x220
[ 33.105924] [<ffffffff812208f7>] vfs_write+0xb7/0x1f0
[ 33.105925] [<ffffffff81221359>] SyS_write+0x49/0xb0
[ 33.105926] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 33.105928]
[ 33.105928] -> (&(&new->fa_lock)->rlock){......} ops: 1 {
[ 33.105930] INITIAL USE at:
[ 33.105931] [<ffffffff810d38f4>] __lock_acquire+0x344/0xb50
[ 33.105933] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105934] [<ffffffff81833e01>] _raw_spin_lock_irqsave+0x51/0x70
[ 33.105936] [<ffffffff812344ee>] kill_fasync+0x9e/0x2a0
[ 33.105938] [<ffffffff81633063>] evdev_pass_values+0xf3/0x1c0
[ 33.105939] [<ffffffff81634bd3>] evdev_events+0x1d3/0x2f0
[ 33.105941] [<ffffffff8162ba77>] input_to_handler+0x97/0xf0
[ 33.105942] [<ffffffff8162e9ac>] input_pass_values.part.6+0x2cc/0x370
[ 33.105944] [<ffffffff8162f361>] input_handle_event+0x121/0x540
[ 33.105946] [<ffffffff8162f988>] input_inject_event+0x198/0x230
[ 33.105947] [<ffffffff8163497c>] evdev_write+0x19c/0x220
[ 33.105949] [<ffffffff812208f7>] vfs_write+0xb7/0x1f0
[ 33.105950] [<ffffffff81221359>] SyS_write+0x49/0xb0
[ 33.105951] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 33.105953] }
[ 33.105953] ... key at: [<ffffffff82e84274>] __key.36822+0x0/0x8
[ 33.105955] ... acquired at:
[ 33.105956] [<ffffffff810d39c8>] __lock_acquire+0x418/0xb50
[ 33.105957] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105959] [<ffffffff8182ef4b>] mutex_lock_nested+0x6b/0x4e0
[ 33.105960] [<ffffffff812a3f6e>] kernfs_fop_open+0x16e/0x360
[ 33.105963] [<ffffffff8121dcff>] do_dentry_open+0x1ff/0x350
[ 33.105965] [<ffffffff8121e030>] finish_open+0x40/0x50
[ 33.105967] [<ffffffff8123108a>] do_last+0xc0a/0x13c0
[ 33.105968] [<ffffffff812318fb>] path_openat+0xbb/0x680
[ 33.105970] [<ffffffff812326ea>] do_filp_open+0x3a/0x90
[ 33.105971] [<ffffffff8121f8d8>] do_sys_open+0x128/0x220
[ 33.105973] [<ffffffff8121f9ee>] SyS_open+0x1e/0x20
[ 33.105974] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 33.105976]
[ 33.105977] -> (&(&client->buffer_lock)->rlock){......} ops: 15 {
[ 33.105979] INITIAL USE at:
[ 33.105980] [<ffffffff810d38f4>] __lock_acquire+0x344/0xb50
[ 33.105981] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.105983] [<ffffffff818334e9>] _raw_spin_lock+0x39/0x50
[ 33.105984] [<ffffffff81632fd3>] evdev_pass_values+0x63/0x1c0
[ 33.105986] [<ffffffff81634bd3>] evdev_events+0x1d3/0x2f0
[ 33.105988] [<ffffffff8162ba77>] input_to_handler+0x97/0xf0
[ 33.105989] [<ffffffff8162e9ac>] input_pass_values.part.6+0x2cc/0x370
[ 33.105991] [<ffffffff8162f361>] input_handle_event+0x121/0x540
[ 33.105992] [<ffffffff8162f7d9>] input_event+0x59/0x70
[ 33.105994] [<ffffffffc0234ef0>] snd_jack_report+0xd0/0xe0 [snd]
[ 33.106000] [<ffffffffc0393058>] snd_hda_jack_report_sync+0xd8/0xe0 [snd_hda_codec]
[ 33.106006] [<ffffffffc042ff32>] jack_callback+0x82/0x90 [snd_hda_codec_hdmi]
[ 33.106008] [<ffffffffc042ffeb>] hdmi_unsol_event+0xab/0x140 [snd_hda_codec_hdmi]
[ 33.106010] [<ffffffffc0389187>] process_unsol_events+0x67/0x80 [snd_hda_codec]
[ 33.106013] [<ffffffff8109a5f3>] process_one_work+0x1e3/0x650
[ 33.106014] [<ffffffff8109ab81>] worker_thread+0x121/0x490
[ 33.106015] [<ffffffff810a0adc>] kthread+0xfc/0x120
[ 33.106017] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 33.106019] }
[ 33.106020] ... key at: [<ffffffff82eae118>] __key.29718+0x0/0x8
[ 33.106022] ... acquired at:
[ 33.106023] [<ffffffff810d39c8>] __lock_acquire+0x418/0xb50
[ 33.106025] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.106026] [<ffffffff8182ef4b>] mutex_lock_nested+0x6b/0x4e0
[ 33.106028] [<ffffffff812a3f6e>] kernfs_fop_open+0x16e/0x360
[ 33.106029] [<ffffffff8121dcff>] do_dentry_open+0x1ff/0x350
[ 33.106031] [<ffffffff8121e030>] finish_open+0x40/0x50
[ 33.106033] [<ffffffff8123108a>] do_last+0xc0a/0x13c0
[ 33.106034] [<ffffffff812318fb>] path_openat+0xbb/0x680
[ 33.106035] [<ffffffff812326ea>] do_filp_open+0x3a/0x90
[ 33.106036] [<ffffffff8121f8d8>] do_sys_open+0x128/0x220
[ 33.106038] [<ffffffff8121f9ee>] SyS_open+0x1e/0x20
[ 33.106040] [<ffffffff8183436d>] system_call_fastpath+0x1a/0x1f
[ 33.106041]
[ 33.106042] -> (&(&dev->event_lock)->rlock#2){-.....} ops: 176 {
[ 33.106044] IN-HARDIRQ-W at:
[ 33.106045] [<ffffffff810d3c1d>] __lock_acquire+0x66d/0xb50
[ 33.106047] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.106048] [<ffffffff81833e01>] _raw_spin_lock_irqsave+0x51/0x70
[ 33.106050] [<ffffffff8162f7c5>] input_event+0x45/0x70
[ 33.106052] [<ffffffffc03cc07f>] hidinput_report_event+0x3f/0x50 [hid]
[ 33.106054] [<ffffffffc03ca1d8>] hid_report_raw_event+0x148/0x1c0 [hid]
[ 33.106057] [<ffffffffc03ca362>] hid_input_report+0x112/0x190 [hid]
[ 33.106059] [<ffffffffc03eac3c>] hid_irq_in+0x8c/0x210 [usbhid]
[ 33.106061] [<ffffffff815e0a73>] __usb_hcd_giveback_urb+0x83/0x130
[ 33.106063] [<ffffffff815e0c2f>] usb_hcd_giveback_urb+0x3f/0x140
[ 33.106065] [<ffffffff816207cf>] handle_tx_event+0x22f/0x12b0
[ 33.106068] [<ffffffff81621b06>] xhci_irq+0x2b6/0xa60
[ 33.106069] [<ffffffff816222c1>] xhci_msi_irq+0x11/0x20
[ 33.106071] [<ffffffff810e7e8e>] handle_irq_event_percpu+0x3e/0x340
[ 33.106073] [<ffffffff810e81cd>] handle_irq_event+0x3d/0x60
[ 33.106075] [<ffffffff810eafef>] handle_edge_irq+0x7f/0x120
[ 33.106076] [<ffffffff8101c85e>] handle_irq+0x1e/0x30
[ 33.106079] [<ffffffff8183738f>] do_IRQ+0x4f/0xf0
[ 33.106081] [<ffffffff81835072>] ret_from_intr+0x0/0x1a
[ 33.106082] [<ffffffff8167c147>] cpuidle_enter+0x17/0x20
[ 33.106084] [<ffffffff810c7bb1>] cpu_idle_loop+0x401/0x4e0
[ 33.106086] [<ffffffff810c7ceb>] cpu_startup_entry+0x5b/0x60
[ 33.106087] [<ffffffff81817cca>] rest_init+0x13a/0x140
[ 33.106088] [<ffffffff81f590ee>] start_kernel+0x499/0x4a4
[ 33.106090] [<ffffffff81f585ee>] x86_64_start_reservations+0x2a/0x2c
[ 33.106092] [<ffffffff81f58733>] x86_64_start_kernel+0x143/0x152
[ 33.106094] INITIAL USE at:
[ 33.106094] [<ffffffff810d38f4>] __lock_acquire+0x344/0xb50
[ 33.106096] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.106098] [<ffffffff81833e01>] _raw_spin_lock_irqsave+0x51/0x70
[ 33.106099] [<ffffffff8162f7c5>] input_event+0x45/0x70
[ 33.106101] [<ffffffffc0234edb>] snd_jack_report+0xbb/0xe0 [snd]
[ 33.106105] [<ffffffffc03932f1>] __snd_hda_jack_add_kctl+0x151/0x160 [snd_hda_codec]
[ 33.106109] [<ffffffffc0393314>] snd_hda_jack_add_kctl+0x14/0x20 [snd_hda_codec]
[ 33.106112] [<ffffffffc042e6e4>] generic_hdmi_build_jack+0xd4/0x150 [snd_hda_codec_hdmi]
[ 33.106114] [<ffffffffc04300c6>] generic_hdmi_build_controls+0x46/0x210 [snd_hda_codec_hdmi]
[ 33.106116] [<ffffffffc03923d5>] snd_hda_codec_build_controls+0x1c5/0x220 [snd_hda_codec]
[ 33.106120] [<ffffffffc0392473>] snd_hda_build_controls+0x43/0xa0 [snd_hda_codec]
[ 33.106123] [<ffffffffc03bf365>] azx_mixer_create+0x15/0x20 [snd_hda_controller]
[ 33.106125] [<ffffffffc03ae751>] azx_probe_continue+0x361/0x710 [snd_hda_intel]
[ 33.106127] [<ffffffffc03aeb95>] azx_probe_work+0x15/0x20 [snd_hda_intel]
[ 33.106129] [<ffffffff8109a5f3>] process_one_work+0x1e3/0x650
[ 33.106130] [<ffffffff8109ab81>] worker_thread+0x121/0x490
[ 33.106132] [<ffffffff810a0adc>] kthread+0xfc/0x120
[ 33.106134] [<ffffffff818342bc>] ret_from_fork+0x7c/0xb0
[ 33.106135] }
[ 33.106136] ... key at: [<ffffffff82eae054>] __key.28093+0x0/0x8
[ 33.106138] ... acquired at:
[ 33.106138] [<ffffffff810d150a>] check_usage_forwards+0x17a/0x180
[ 33.106140] [<ffffffff810d2e71>] mark_lock+0x1a1/0x2a0
[ 33.106141] [<ffffffff810d3c1d>] __lock_acquire+0x66d/0xb50
[ 33.106143] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.106145] [<ffffffff81833e01>] _raw_spin_lock_irqsave+0x51/0x70
[ 33.106146] [<ffffffff8162f7c5>] input_event+0x45/0x70
[ 33.106148] [<ffffffffc03cc07f>] hidinput_report_event+0x3f/0x50 [hid]
[ 33.106151] [<ffffffffc03ca1d8>] hid_report_raw_event+0x148/0x1c0 [hid]
[ 33.106153] [<ffffffffc03ca362>] hid_input_report+0x112/0x190 [hid]
[ 33.106155] [<ffffffffc03eac3c>] hid_irq_in+0x8c/0x210 [usbhid]
[ 33.106157] [<ffffffff815e0a73>] __usb_hcd_giveback_urb+0x83/0x130
[ 33.106159] [<ffffffff815e0c2f>] usb_hcd_giveback_urb+0x3f/0x140
[ 33.106160] [<ffffffff816207cf>] handle_tx_event+0x22f/0x12b0
[ 33.106162] [<ffffffff81621b06>] xhci_irq+0x2b6/0xa60
[ 33.106164] [<ffffffff816222c1>] xhci_msi_irq+0x11/0x20
[ 33.106165] [<ffffffff810e7e8e>] handle_irq_event_percpu+0x3e/0x340
[ 33.106167] [<ffffffff810e81cd>] handle_irq_event+0x3d/0x60
[ 33.106169] [<ffffffff810eafef>] handle_edge_irq+0x7f/0x120
[ 33.106170] [<ffffffff8101c85e>] handle_irq+0x1e/0x30
[ 33.106172] [<ffffffff8183738f>] do_IRQ+0x4f/0xf0
[ 33.106174] [<ffffffff81835072>] ret_from_intr+0x0/0x1a
[ 33.106175] [<ffffffff8167c147>] cpuidle_enter+0x17/0x20
[ 33.106177] [<ffffffff810c7bb1>] cpu_idle_loop+0x401/0x4e0
[ 33.106178] [<ffffffff810c7ceb>] cpu_startup_entry+0x5b/0x60
[ 33.106179] [<ffffffff81817cca>] rest_init+0x13a/0x140
[ 33.106181] [<ffffffff81f590ee>] start_kernel+0x499/0x4a4
[ 33.106182] [<ffffffff81f585ee>] x86_64_start_reservations+0x2a/0x2c
[ 33.106184] [<ffffffff81f58733>] x86_64_start_kernel+0x143/0x152
[ 33.106185]
[ 33.106186]
[ 33.106186] stack backtrace:
[ 33.106188] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.17.0-031700rc3-generic #201409031132
[ 33.106189] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.5 07/22/2014
[ 33.106190] ffffffff81e1d4c0 ffff88041ba03a60 ffffffff81829c6a ffffffff82bd7620
[ 33.106192] ffff88041ba03aa0 ffffffff81822ff3 ffffffff81cbcf5e 0000000000000000
[ 33.106193] ffffffff81e1dd58 ffffffff81e1d4c0 ffffffff81cbcf5e ffffffff82bd7620
[ 33.106195] Call Trace:
[ 33.106196] <IRQ> [<ffffffff81829c6a>] dump_stack+0x4d/0x66
[ 33.106200] [<ffffffff81822ff3>] print_irq_inversion_bug.part.38+0x1ac/0x1b8
[ 33.106203] [<ffffffff810d150a>] check_usage_forwards+0x17a/0x180
[ 33.106205] [<ffffffff8102b0bb>] ? save_stack_trace+0x2b/0x50
[ 33.106206] [<ffffffff810d1390>] ? check_usage_backwards+0x180/0x180
[ 33.106208] [<ffffffff810d2e71>] mark_lock+0x1a1/0x2a0
[ 33.106210] [<ffffffff810d3c1d>] __lock_acquire+0x66d/0xb50
[ 33.106212] [<ffffffffc03edd76>] ? hiddev_send_event.isra.3+0xe6/0x100 [usbhid]
[ 33.106214] [<ffffffff810d48f9>] lock_acquire+0xa9/0x200
[ 33.106216] [<ffffffff8162f7c5>] ? input_event+0x45/0x70
[ 33.106218] [<ffffffff81833e01>] _raw_spin_lock_irqsave+0x51/0x70
[ 33.106219] [<ffffffff8162f7c5>] ? input_event+0x45/0x70
[ 33.106221] [<ffffffff8162f7c5>] input_event+0x45/0x70
[ 33.106224] [<ffffffffc03cc07f>] hidinput_report_event+0x3f/0x50 [hid]
[ 33.106226] [<ffffffffc03ca1d8>] hid_report_raw_event+0x148/0x1c0 [hid]
[ 33.106228] [<ffffffff8183372f>] ? _raw_spin_unlock_irqrestore+0x5f/0x70
[ 33.106230] [<ffffffffc03ca362>] hid_input_report+0x112/0x190 [hid]
[ 33.106232] [<ffffffffc03eac3c>] hid_irq_in+0x8c/0x210 [usbhid]
[ 33.106234] [<ffffffff815e0a73>] __usb_hcd_giveback_urb+0x83/0x130
[ 33.106236] [<ffffffff815e0c2f>] usb_hcd_giveback_urb+0x3f/0x140
[ 33.106238] [<ffffffff816207cf>] handle_tx_event+0x22f/0x12b0
[ 33.106240] [<ffffffff8162187c>] ? xhci_irq+0x2c/0xa60
[ 33.106241] [<ffffffff81621b06>] xhci_irq+0x2b6/0xa60
[ 33.106243] [<ffffffff816222c1>] xhci_msi_irq+0x11/0x20
[ 33.106245] [<ffffffff810e7e8e>] handle_irq_event_percpu+0x3e/0x340
[ 33.106247] [<ffffffff810e81cd>] handle_irq_event+0x3d/0x60
[ 33.106249] [<ffffffff810eafef>] handle_edge_irq+0x7f/0x120
[ 33.106251] [<ffffffff8101c85e>] handle_irq+0x1e/0x30
[ 33.106253] [<ffffffff8183738f>] do_IRQ+0x4f/0xf0
[ 33.106254] [<ffffffff81835072>] common_interrupt+0x72/0x72
[ 33.106255] <EOI> [<ffffffff8167be05>] ? cpuidle_enter_state+0x75/0x300
[ 33.106258] [<ffffffff8167c147>] cpuidle_enter+0x17/0x20
[ 33.106260] [<ffffffff810c7bb1>] cpu_idle_loop+0x401/0x4e0
[ 33.106261] [<ffffffff810c7ceb>] cpu_startup_entry+0x5b/0x60
[ 33.106262] [<ffffffff81817cca>] rest_init+0x13a/0x140
[ 33.106264] [<ffffffff81817b95>] ? rest_init+0x5/0x140
[ 33.106266] [<ffffffff81f590ee>] start_kernel+0x499/0x4a4
[ 33.106267] [<ffffffff81f58a4e>] ? set_init_arg+0x53/0x53
[ 33.106269] [<ffffffff81f58120>] ? early_idt_handlers+0x120/0x120
[ 33.106271] [<ffffffff81f585ee>] x86_64_start_reservations+0x2a/0x2c
[ 33.106272] [<ffffffff81f58733>] x86_64_start_kernel+0x143/0x152
I have fixed lockdep discussed here: https://lkml.org/lkml/2014/8/25/515 but as I'm not sure if my fix was any good I also tried to revert commit causing that and still I see this.
I have not tried bisecting yet but tried to check if anything has changed around those locks recently but did not spot anything obvious yet.
-Kari
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