[ 17.225800] ========================================================= [ 17.225805] [ INFO: possible irq lock inversion dependency detected ] [ 17.225808] 2.6.38-wl-65107-gc5f1016-dirty #211 [ 17.225810] --------------------------------------------------------- [ 17.225813] modprobe/2506 just changed the state of lock: [ 17.225816] (&(&dev_priv->context_switch_lock)->rlock){-.....}, at: [<ffffffffa07e93bf>] nouveau_irq_handler+0x5f/0x130 [nouveau] [ 17.225842] but this lock took another, HARDIRQ-unsafe lock in the past: [ 17.225844] (&(&dev_priv->ramin_lock)->rlock){+.+...} [ 17.225847] [ 17.225848] and interrupts could create inverse lock ordering between them. [ 17.225849] [ 17.225851] [ 17.225852] other info that might help us debug this: [ 17.225855] 5 locks held by modprobe/2506: [ 17.225857] #0: (&__lockdep_no_validate__){+.+.+.}, at: [<ffffffff8132f30b>] __driver_attach+0x5b/0xb0 [ 17.225869] #1: (&__lockdep_no_validate__){+.+.+.}, at: [<ffffffff8132f319>] __driver_attach+0x69/0xb0 [ 17.225877] #2: (drm_global_mutex){+.+.+.}, at: [<ffffffffa0759202>] drm_get_pci_dev+0x102/0x2c0 [drm] [ 17.225896] #3: (&chan->mutex){+.+.+.}, at: [<ffffffffa07e55d4>] nouveau_channel_alloc+0xc4/0x470 [nouveau] [ 17.225915] #4: (&sb->s_type->i_mutex_key#2){+.+.+.}, at: [<ffffffff8122e367>] debugfs_create_by_name+0x57/0x1d0 [ 17.225926] [ 17.225927] the shortest dependencies between 2nd lock and 1st lock: [ 17.225953] -> (&(&dev_priv->ramin_lock)->rlock){+.+...} ops: 24860 { [ 17.225960] HARDIRQ-ON-W at: [ 17.225963] [<ffffffff81084fab>] mark_irqflags+0x13b/0x1c0 [ 17.225970] [<ffffffff8108716c>] __lock_acquire+0x5ac/0xa80 [ 17.225975] [<ffffffff81087d4e>] lock_acquire+0x9e/0x1d0 [ 17.225980] [<ffffffff8149bdf0>] _raw_spin_lock+0x40/0x80 [ 17.225986] [<ffffffffa07e82c1>] nouveau_gpuobj_new+0xb1/0x2d0 [nouveau] [ 17.226002] [<ffffffffa0844cec>] nv50_instmem_init+0x13c/0x530 [nouveau] [ 17.226024] [<ffffffffa07e41db>] nouveau_card_init+0x12b/0x3d0 [nouveau] [ 17.226039] [<ffffffffa07e47c9>] nouveau_load+0x329/0x550 [nouveau] [ 17.226055] [<ffffffffa0759290>] drm_get_pci_dev+0x190/0x2c0 [drm] [ 17.226066] [<ffffffffa0861e79>] nouveau_pci_probe+0x15/0x17 [nouveau] [ 17.226084] [<ffffffff81296cdf>] local_pci_probe+0x5f/0xd0 [ 17.226090] [<ffffffff81297458>] pci_device_probe+0x88/0xb0 [ 17.226095] [<ffffffff8132ef78>] really_probe+0x68/0x190 [ 17.226100] [<ffffffff8132f285>] driver_probe_device+0x45/0x70 [ 17.226105] [<ffffffff8132f35b>] __driver_attach+0xab/0xb0 [ 17.226110] [<ffffffff8132e096>] bus_for_each_dev+0x66/0x90 [ 17.226115] [<ffffffff8132edce>] driver_attach+0x1e/0x20 [ 17.226120] [<ffffffff8132e998>] bus_add_driver+0x158/0x290 [ 17.226125] [<ffffffff8132f614>] driver_register+0x74/0x130 [ 17.226130] [<ffffffff812976d6>] __pci_register_driver+0x66/0xe0 [ 17.226135] [<ffffffffa075977f>] drm_pci_init+0xdf/0xf0 [drm] [ 17.226146] [<ffffffffa0750748>] drm_init+0x58/0x70 [drm] [ 17.226155] [<ffffffffa0887048>] nouveau_init+0x48/0x4a [nouveau] [ 17.226169] [<ffffffff810002e4>] do_one_initcall+0x44/0x180 [ 17.226175] [<ffffffff8109693a>] sys_init_module+0xca/0x210 [ 17.226181] [<ffffffff8100268b>] system_call_fastpath+0x16/0x1b [ 17.226186] SOFTIRQ-ON-W at: [ 17.226189] [<ffffffff81084fcf>] mark_irqflags+0x15f/0x1c0 [ 17.226194] [<ffffffff8108716c>] __lock_acquire+0x5ac/0xa80 [ 17.226199] [<ffffffff81087d4e>] lock_acquire+0x9e/0x1d0 [ 17.226204] [<ffffffff8149bdf0>] _raw_spin_lock+0x40/0x80 [ 17.226208] [<ffffffffa07e82c1>] nouveau_gpuobj_new+0xb1/0x2d0 [nouveau] [ 17.226225] [<ffffffffa0844cec>] nv50_instmem_init+0x13c/0x530 [nouveau] [ 17.226244] [<ffffffffa07e41db>] nouveau_card_init+0x12b/0x3d0 [nouveau] [ 17.226260] [<ffffffffa07e47c9>] nouveau_load+0x329/0x550 [nouveau] [ 17.226275] [<ffffffffa0759290>] drm_get_pci_dev+0x190/0x2c0 [drm] [ 17.226286] [<ffffffffa0861e79>] nouveau_pci_probe+0x15/0x17 [nouveau] [ 17.226303] [<ffffffff81296cdf>] local_pci_probe+0x5f/0xd0 [ 17.226309] [<ffffffff81297458>] pci_device_probe+0x88/0xb0 [ 17.226314] [<ffffffff8132ef78>] really_probe+0x68/0x190 [ 17.226319] [<ffffffff8132f285>] driver_probe_device+0x45/0x70 [ 17.226324] [<ffffffff8132f35b>] __driver_attach+0xab/0xb0 [ 17.226329] [<ffffffff8132e096>] bus_for_each_dev+0x66/0x90 [ 17.226334] [<ffffffff8132edce>] driver_attach+0x1e/0x20 [ 17.226339] [<ffffffff8132e998>] bus_add_driver+0x158/0x290 [ 17.226343] [<ffffffff8132f614>] driver_register+0x74/0x130 [ 17.226348] [<ffffffff812976d6>] __pci_register_driver+0x66/0xe0 [ 17.226354] [<ffffffffa075977f>] drm_pci_init+0xdf/0xf0 [drm] [ 17.226364] [<ffffffffa0750748>] drm_init+0x58/0x70 [drm] [ 17.226373] [<ffffffffa0887048>] nouveau_init+0x48/0x4a [nouveau] [ 17.226387] [<ffffffff810002e4>] do_one_initcall+0x44/0x180 [ 17.226392] [<ffffffff8109693a>] sys_init_module+0xca/0x210 [ 17.226397] [<ffffffff8100268b>] system_call_fastpath+0x16/0x1b [ 17.226402] INITIAL USE at: [ 17.226405] [<ffffffff81086f9a>] __lock_acquire+0x3da/0xa80 [ 17.226410] [<ffffffff81087d4e>] lock_acquire+0x9e/0x1d0 [ 17.226415] [<ffffffff8149bdf0>] _raw_spin_lock+0x40/0x80 [ 17.226420] [<ffffffffa07e82c1>] nouveau_gpuobj_new+0xb1/0x2d0 [nouveau] [ 17.226436] [<ffffffffa0844cec>] nv50_instmem_init+0x13c/0x530 [nouveau] [ 17.226456] [<ffffffffa07e41db>] nouveau_card_init+0x12b/0x3d0 [nouveau] [ 17.226471] [<ffffffffa07e47c9>] nouveau_load+0x329/0x550 [nouveau] [ 17.226486] [<ffffffffa0759290>] drm_get_pci_dev+0x190/0x2c0 [drm] [ 17.226497] [<ffffffffa0861e79>] nouveau_pci_probe+0x15/0x17 [nouveau] [ 17.226514] [<ffffffff81296cdf>] local_pci_probe+0x5f/0xd0 [ 17.226520] [<ffffffff81297458>] pci_device_probe+0x88/0xb0 [ 17.226525] [<ffffffff8132ef78>] really_probe+0x68/0x190 [ 17.226530] [<ffffffff8132f285>] driver_probe_device+0x45/0x70 [ 17.226535] [<ffffffff8132f35b>] __driver_attach+0xab/0xb0 [ 17.226540] [<ffffffff8132e096>] bus_for_each_dev+0x66/0x90 [ 17.226545] [<ffffffff8132edce>] driver_attach+0x1e/0x20 [ 17.226549] [<ffffffff8132e998>] bus_add_driver+0x158/0x290 [ 17.226554] [<ffffffff8132f614>] driver_register+0x74/0x130 [ 17.226559] [<ffffffff812976d6>] __pci_register_driver+0x66/0xe0 [ 17.226564] [<ffffffffa075977f>] drm_pci_init+0xdf/0xf0 [drm] [ 17.226575] [<ffffffffa0750748>] drm_init+0x58/0x70 [drm] [ 17.226583] [<ffffffffa0887048>] nouveau_init+0x48/0x4a [nouveau] [ 17.226597] [<ffffffff810002e4>] do_one_initcall+0x44/0x180 [ 17.226602] [<ffffffff8109693a>] sys_init_module+0xca/0x210 [ 17.226607] [<ffffffff8100268b>] system_call_fastpath+0x16/0x1b [ 17.226612] } [ 17.226614] ... key at: [<ffffffffa0875d18>] __key.34306+0x0/0xfffffffffffec192 [nouveau] [ 17.226628] ... acquired at: [ 17.226630] [<ffffffff810841b1>] validate_chain.clone.19+0x5b1/0x6f0 [ 17.226634] [<ffffffff8108705d>] __lock_acquire+0x49d/0xa80 [ 17.226638] [<ffffffff81087d4e>] lock_acquire+0x9e/0x1d0 [ 17.226643] [<ffffffff8149bdf0>] _raw_spin_lock+0x40/0x80 [ 17.226647] [<ffffffffa08451e2>] nv84_instmem_flush+0x22/0xa0 [nouveau] [ 17.226666] [<ffffffffa081404c>] nv50_fifo_create_context+0x26c/0x350 [nouveau] [ 17.226685] [<ffffffffa07e573c>] nouveau_channel_alloc+0x22c/0x470 [nouveau] [ 17.226700] [<ffffffffa07e3df1>] nouveau_card_init_channel+0x51/0x170 [nouveau] [ 17.226715] [<ffffffffa07e4308>] nouveau_card_init+0x258/0x3d0 [nouveau] [ 17.226730] [<ffffffffa07e47c9>] nouveau_load+0x329/0x550 [nouveau] [ 17.226745] [<ffffffffa0759290>] drm_get_pci_dev+0x190/0x2c0 [drm] [ 17.226755] [<ffffffffa0861e79>] nouveau_pci_probe+0x15/0x17 [nouveau] [ 17.226772] [<ffffffff81296cdf>] local_pci_probe+0x5f/0xd0 [ 17.226777] [<ffffffff81297458>] pci_device_probe+0x88/0xb0 [ 17.226781] [<ffffffff8132ef78>] really_probe+0x68/0x190 [ 17.226786] [<ffffffff8132f285>] driver_probe_device+0x45/0x70 [ 17.226791] [<ffffffff8132f35b>] __driver_attach+0xab/0xb0 [ 17.226795] [<ffffffff8132e096>] bus_for_each_dev+0x66/0x90 [ 17.226800] [<ffffffff8132edce>] driver_attach+0x1e/0x20 [ 17.226804] [<ffffffff8132e998>] bus_add_driver+0x158/0x290 [ 17.226808] [<ffffffff8132f614>] driver_register+0x74/0x130 [ 17.226813] [<ffffffff812976d6>] __pci_register_driver+0x66/0xe0 [ 17.226817] [<ffffffffa075977f>] drm_pci_init+0xdf/0xf0 [drm] [ 17.226827] [<ffffffffa0750748>] drm_init+0x58/0x70 [drm] [ 17.226836] [<ffffffffa0887048>] nouveau_init+0x48/0x4a [nouveau] [ 17.226849] [<ffffffff810002e4>] do_one_initcall+0x44/0x180 [ 17.226853] [<ffffffff8109693a>] sys_init_module+0xca/0x210 [ 17.226858] [<ffffffff8100268b>] system_call_fastpath+0x16/0x1b [ 17.226862] [ 17.226864] -> (&(&dev_priv->context_switch_lock)->rlock){-.....} ops: 6 { [ 17.226870] IN-HARDIRQ-W at: [ 17.226873] [<ffffffff8108500d>] mark_irqflags+0x19d/0x1c0 [ 17.226878] [<ffffffff8108716c>] __lock_acquire+0x5ac/0xa80 [ 17.226883] [<ffffffff81087d4e>] lock_acquire+0x9e/0x1d0 [ 17.226887] [<ffffffff8149bfa2>] _raw_spin_lock_irqsave+0x52/0x90 [ 17.226892] [<ffffffffa07e93bf>] nouveau_irq_handler+0x5f/0x130 [nouveau] [ 17.226909] [<ffffffff810a6fd9>] handle_IRQ_event+0x79/0x2f0 [ 17.226915] [<ffffffff810a99fd>] handle_fasteoi_irq+0x7d/0x100 [ 17.226920] [<ffffffff81004e52>] handle_irq+0x22/0x40 [ 17.226925] [<ffffffff81004add>] do_IRQ+0x5d/0xe0 [ 17.226930] [<ffffffff8149d153>] ret_from_intr+0x0/0x13 [ 17.226935] [<ffffffff8149a523>] mutex_lock_nested+0x73/0x3b0 [ 17.226940] [<ffffffff8122e367>] debugfs_create_by_name+0x57/0x1d0 [ 17.226945] [<ffffffff8122e568>] debugfs_create_file+0x88/0xb0 [ 17.226950] [<ffffffff8122e62b>] debugfs_create_dir+0x1b/0x20 [ 17.226954] [<ffffffffa086141a>] nouveau_debugfs_channel_init+0xca/0xf0 [nouveau] [ 17.226974] [<ffffffffa07e57d1>] nouveau_channel_alloc+0x2c1/0x470 [nouveau] [ 17.226990] [<ffffffffa07e3df1>] nouveau_card_init_channel+0x51/0x170 [nouveau] [ 17.227005] [<ffffffffa07e4308>] nouveau_card_init+0x258/0x3d0 [nouveau] [ 17.227021] [<ffffffffa07e47c9>] nouveau_load+0x329/0x550 [nouveau] [ 17.227036] [<ffffffffa0759290>] drm_get_pci_dev+0x190/0x2c0 [drm] [ 17.227047] [<ffffffffa0861e79>] nouveau_pci_probe+0x15/0x17 [nouveau] [ 17.227065] [<ffffffff81296cdf>] local_pci_probe+0x5f/0xd0 [ 17.227070] [<ffffffff81297458>] pci_device_probe+0x88/0xb0 [ 17.227075] [<ffffffff8132ef78>] really_probe+0x68/0x190 [ 17.227080] [<ffffffff8132f285>] driver_probe_device+0x45/0x70 [ 17.227085] [<ffffffff8132f35b>] __driver_attach+0xab/0xb0 [ 17.227090] [<ffffffff8132e096>] bus_for_each_dev+0x66/0x90 [ 17.227095] [<ffffffff8132edce>] driver_attach+0x1e/0x20 [ 17.227100] [<ffffffff8132e998>] bus_add_driver+0x158/0x290 [ 17.227105] [<ffffffff8132f614>] driver_register+0x74/0x130 [ 17.227110] [<ffffffff812976d6>] __pci_register_driver+0x66/0xe0 [ 17.227115] [<ffffffffa075977f>] drm_pci_init+0xdf/0xf0 [drm] [ 17.227125] [<ffffffffa0750748>] drm_init+0x58/0x70 [drm] [ 17.227134] [<ffffffffa0887048>] nouveau_init+0x48/0x4a [nouveau] [ 17.227148] [<ffffffff810002e4>] do_one_initcall+0x44/0x180 [ 17.227153] [<ffffffff8109693a>] sys_init_module+0xca/0x210 [ 17.227158] [<ffffffff8100268b>] system_call_fastpath+0x16/0x1b [ 17.227163] INITIAL USE at: [ 17.227166] [<ffffffff81086f9a>] __lock_acquire+0x3da/0xa80 [ 17.227171] [<ffffffff81087d4e>] lock_acquire+0x9e/0x1d0 [ 17.227175] [<ffffffff8149bfa2>] _raw_spin_lock_irqsave+0x52/0x90 [ 17.227180] [<ffffffffa07e95bf>] nouveau_irq_register+0x3f/0x70 [nouveau] [ 17.227197] [<ffffffffa085f5e2>] nv50_gpio_init+0x82/0x150 [nouveau] [ 17.227217] [<ffffffffa07e4218>] nouveau_card_init+0x168/0x3d0 [nouveau] [ 17.227233] [<ffffffffa07e47c9>] nouveau_load+0x329/0x550 [nouveau] [ 17.227248] [<ffffffffa0759290>] drm_get_pci_dev+0x190/0x2c0 [drm] [ 17.227259] [<ffffffffa0861e79>] nouveau_pci_probe+0x15/0x17 [nouveau] [ 17.227276] [<ffffffff81296cdf>] local_pci_probe+0x5f/0xd0 [ 17.227281] [<ffffffff81297458>] pci_device_probe+0x88/0xb0 [ 17.227286] [<ffffffff8132ef78>] really_probe+0x68/0x190 [ 17.227291] [<ffffffff8132f285>] driver_probe_device+0x45/0x70 [ 17.227296] [<ffffffff8132f35b>] __driver_attach+0xab/0xb0 [ 17.227301] [<ffffffff8132e096>] bus_for_each_dev+0x66/0x90 [ 17.227306] [<ffffffff8132edce>] driver_attach+0x1e/0x20 [ 17.227310] [<ffffffff8132e998>] bus_add_driver+0x158/0x290 [ 17.227315] [<ffffffff8132f614>] driver_register+0x74/0x130 [ 17.227320] [<ffffffff812976d6>] __pci_register_driver+0x66/0xe0 [ 17.227325] [<ffffffffa075977f>] drm_pci_init+0xdf/0xf0 [drm] [ 17.227336] [<ffffffffa0750748>] drm_init+0x58/0x70 [drm] [ 17.227344] [<ffffffffa0887048>] nouveau_init+0x48/0x4a [nouveau] [ 17.227358] [<ffffffff810002e4>] do_one_initcall+0x44/0x180 [ 17.227363] [<ffffffff8109693a>] sys_init_module+0xca/0x210 [ 17.227368] [<ffffffff8100268b>] system_call_fastpath+0x16/0x1b [ 17.227373] } [ 17.227374] ... key at: [<ffffffffa0875cf8>] __key.34928+0x0/0xfffffffffffec1b2 [nouveau] [ 17.227388] ... acquired at: [ 17.227390] [<ffffffff81082cb9>] check_usage_forwards+0x89/0x100 [ 17.227395] [<ffffffff81084839>] mark_lock_irq+0x99/0x2b0 [ 17.227399] [<ffffffff81084bc1>] mark_lock+0x171/0x420 [ 17.227403] [<ffffffff8108500d>] mark_irqflags+0x19d/0x1c0 [ 17.227407] [<ffffffff8108716c>] __lock_acquire+0x5ac/0xa80 [ 17.227411] [<ffffffff81087d4e>] lock_acquire+0x9e/0x1d0 [ 17.227416] [<ffffffff8149bfa2>] _raw_spin_lock_irqsave+0x52/0x90 [ 17.227420] [<ffffffffa07e93bf>] nouveau_irq_handler+0x5f/0x130 [nouveau] [ 17.227436] [<ffffffff810a6fd9>] handle_IRQ_event+0x79/0x2f0 [ 17.227440] [<ffffffff810a99fd>] handle_fasteoi_irq+0x7d/0x100 [ 17.227445] [<ffffffff81004e52>] handle_irq+0x22/0x40 [ 17.227449] [<ffffffff81004add>] do_IRQ+0x5d/0xe0 [ 17.227453] [<ffffffff8149d153>] ret_from_intr+0x0/0x13 [ 17.227457] [<ffffffff8149a523>] mutex_lock_nested+0x73/0x3b0 [ 17.227461] [<ffffffff8122e367>] debugfs_create_by_name+0x57/0x1d0 [ 17.227466] [<ffffffff8122e568>] debugfs_create_file+0x88/0xb0 [ 17.227470] [<ffffffff8122e62b>] debugfs_create_dir+0x1b/0x20 [ 17.227474] [<ffffffffa086141a>] nouveau_debugfs_channel_init+0xca/0xf0 [nouveau] [ 17.227493] [<ffffffffa07e57d1>] nouveau_channel_alloc+0x2c1/0x470 [nouveau] [ 17.227508] [<ffffffffa07e3df1>] nouveau_card_init_channel+0x51/0x170 [nouveau] [ 17.227523] [<ffffffffa07e4308>] nouveau_card_init+0x258/0x3d0 [nouveau] [ 17.227538] [<ffffffffa07e47c9>] nouveau_load+0x329/0x550 [nouveau] [ 17.227553] [<ffffffffa0759290>] drm_get_pci_dev+0x190/0x2c0 [drm] [ 17.227563] [<ffffffffa0861e79>] nouveau_pci_probe+0x15/0x17 [nouveau] [ 17.227580] [<ffffffff81296cdf>] local_pci_probe+0x5f/0xd0 [ 17.227585] [<ffffffff81297458>] pci_device_probe+0x88/0xb0 [ 17.227589] [<ffffffff8132ef78>] really_probe+0x68/0x190 [ 17.227594] [<ffffffff8132f285>] driver_probe_device+0x45/0x70 [ 17.227598] [<ffffffff8132f35b>] __driver_attach+0xab/0xb0 [ 17.227602] [<ffffffff8132e096>] bus_for_each_dev+0x66/0x90 [ 17.227607] [<ffffffff8132edce>] driver_attach+0x1e/0x20 [ 17.227611] [<ffffffff8132e998>] bus_add_driver+0x158/0x290 [ 17.227616] [<ffffffff8132f614>] driver_register+0x74/0x130 [ 17.227620] [<ffffffff812976d6>] __pci_register_driver+0x66/0xe0 [ 17.227625] [<ffffffffa075977f>] drm_pci_init+0xdf/0xf0 [drm] [ 17.227635] [<ffffffffa0750748>] drm_init+0x58/0x70 [drm] [ 17.227643] [<ffffffffa0887048>] nouveau_init+0x48/0x4a [nouveau] [ 17.227656] [<ffffffff810002e4>] do_one_initcall+0x44/0x180 [ 17.227661] [<ffffffff8109693a>] sys_init_module+0xca/0x210 [ 17.227665] [<ffffffff8100268b>] system_call_fastpath+0x16/0x1b [ 17.227669] [ 17.227671] [ 17.227672] stack backtrace: [ 17.227675] Pid: 2506, comm: modprobe Not tainted 2.6.38-wl-65107-gc5f1016-dirty #211 [ 17.227678] Call Trace: [ 17.227680] <IRQ> [<ffffffff81082c07>] ? print_irq_inversion_bug+0x137/0x160 [ 17.227689] [<ffffffff81082cb9>] ? check_usage_forwards+0x89/0x100 [ 17.227695] [<ffffffff810759b5>] ? sched_clock_local+0x25/0x90 [ 17.227699] [<ffffffff81082c30>] ? check_usage_forwards+0x0/0x100 [ 17.227704] [<ffffffff81084839>] ? mark_lock_irq+0x99/0x2b0 [ 17.227708] [<ffffffff810109cd>] ? save_stack_trace+0x2d/0x50 [ 17.227713] [<ffffffff81084bc1>] ? mark_lock+0x171/0x420 [ 17.227717] [<ffffffff8108500d>] ? mark_irqflags+0x19d/0x1c0 [ 17.227722] [<ffffffff8108716c>] ? __lock_acquire+0x5ac/0xa80 [ 17.227726] [<ffffffff8149cb65>] ? _raw_spin_unlock+0x55/0x60 [ 17.227731] [<ffffffff81009d79>] ? native_sched_clock+0x29/0x80 [ 17.227735] [<ffffffff81087d4e>] ? lock_acquire+0x9e/0x1d0 [ 17.227751] [<ffffffffa07e93bf>] ? nouveau_irq_handler+0x5f/0x130 [nouveau] [ 17.227756] [<ffffffff8149bfa2>] ? _raw_spin_lock_irqsave+0x52/0x90 [ 17.227772] [<ffffffffa07e93bf>] ? nouveau_irq_handler+0x5f/0x130 [nouveau] [ 17.227776] [<ffffffff81075b48>] ? sched_clock_cpu+0xa8/0x120 [ 17.227792] [<ffffffffa07e93bf>] ? nouveau_irq_handler+0x5f/0x130 [nouveau] [ 17.227797] [<ffffffff8108178e>] ? put_lock_stats.clone.14+0xe/0x40 [ 17.227801] [<ffffffff81081868>] ? lock_release_holdtime+0xa8/0x150 [ 17.227806] [<ffffffff810a6fd9>] ? handle_IRQ_event+0x79/0x2f0 [ 17.227810] [<ffffffff810a99f2>] ? handle_fasteoi_irq+0x72/0x100 [ 17.227816] [<ffffffff810a99fd>] ? handle_fasteoi_irq+0x7d/0x100 [ 17.227820] [<ffffffff81004e52>] ? handle_irq+0x22/0x40 [ 17.227824] [<ffffffff81004add>] ? do_IRQ+0x5d/0xe0 [ 17.227828] [<ffffffff8149d153>] ? ret_from_intr+0x0/0x13 [ 17.227831] <EOI> [<ffffffff81087d63>] ? lock_acquire+0xb3/0x1d0 [ 17.227840] [<ffffffff8122e367>] ? debugfs_create_by_name+0x57/0x1d0 [ 17.227844] [<ffffffff81075b48>] ? sched_clock_cpu+0xa8/0x120 [ 17.227849] [<ffffffff8149a523>] ? mutex_lock_nested+0x73/0x3b0 [ 17.227853] [<ffffffff8122e367>] ? debugfs_create_by_name+0x57/0x1d0 [ 17.227859] [<ffffffff8114487d>] ? simple_pin_fs+0x4d/0xb0 [ 17.227863] [<ffffffff8122e367>] ? debugfs_create_by_name+0x57/0x1d0 [ 17.227868] [<ffffffff8114487d>] ? simple_pin_fs+0x4d/0xb0 [ 17.227873] [<ffffffff8103f221>] ? get_parent_ip+0x11/0x50 [ 17.227878] [<ffffffff8122e367>] ? debugfs_create_by_name+0x57/0x1d0 [ 17.227883] [<ffffffff8122e568>] ? debugfs_create_file+0x88/0xb0 [ 17.227887] [<ffffffff8122e62b>] ? debugfs_create_dir+0x1b/0x20 [ 17.227906] [<ffffffffa086141a>] ? nouveau_debugfs_channel_init+0xca/0xf0 [nouveau] [ 17.227922] [<ffffffffa07e57d1>] ? nouveau_channel_alloc+0x2c1/0x470 [nouveau] [ 17.227938] [<ffffffffa07e3df1>] ? nouveau_card_init_channel+0x51/0x170 [nouveau] [ 17.227953] [<ffffffffa07e4308>] ? nouveau_card_init+0x258/0x3d0 [nouveau] [ 17.227968] [<ffffffffa07e47c9>] ? nouveau_load+0x329/0x550 [nouveau] [ 17.227980] [<ffffffffa0759290>] ? drm_get_pci_dev+0x190/0x2c0 [drm] [ 17.227997] [<ffffffffa0861e79>] ? nouveau_pci_probe+0x15/0x17 [nouveau] [ 17.228002] [<ffffffff81296cdf>] ? local_pci_probe+0x5f/0xd0 [ 17.228007] [<ffffffff81297458>] ? pci_device_probe+0x88/0xb0 [ 17.228012] [<ffffffff8132ee4a>] ? driver_sysfs_add+0x7a/0xb0 [ 17.228016] [<ffffffff8132ef78>] ? really_probe+0x68/0x190 [ 17.228021] [<ffffffff8132f285>] ? driver_probe_device+0x45/0x70 [ 17.228026] [<ffffffff8132f35b>] ? __driver_attach+0xab/0xb0 [ 17.228030] [<ffffffff8132f2b0>] ? __driver_attach+0x0/0xb0 [ 17.228035] [<ffffffff8132e096>] ? bus_for_each_dev+0x66/0x90 [ 17.228039] [<ffffffff8132edce>] ? driver_attach+0x1e/0x20 [ 17.228044] [<ffffffff8132e998>] ? bus_add_driver+0x158/0x290 [ 17.228057] [<ffffffffa0887000>] ? nouveau_init+0x0/0x4a [nouveau] [ 17.228062] [<ffffffff8132f614>] ? driver_register+0x74/0x130 [ 17.228076] [<ffffffffa0887000>] ? nouveau_init+0x0/0x4a [nouveau] [ 17.228081] [<ffffffff812976d6>] ? __pci_register_driver+0x66/0xe0 [ 17.228092] [<ffffffffa075977f>] ? drm_pci_init+0xdf/0xf0 [drm] [ 17.228105] [<ffffffffa0887000>] ? nouveau_init+0x0/0x4a [nouveau] [ 17.228114] [<ffffffffa0750748>] ? drm_init+0x58/0x70 [drm] [ 17.228127] [<ffffffffa0887048>] ? nouveau_init+0x48/0x4a [nouveau] [ 17.228132] [<ffffffff810002e4>] ? do_one_initcall+0x44/0x180 [ 17.228137] [<ffffffff8109693a>] ? sys_init_module+0xca/0x210 [ 17.228141] [<ffffffff8100268b>] ? system_call_fastpath+0x16/0x1b
Kernel version is unclear. Is this a 2.6.37->2.6.38 regression, or a post-2.6.38 regression? Thanks.
I think this problem was introduced by 6f70a4c3d19e8e8e1047a4dbf0ca910fed39f619. This commit fixes a real problem, so it shouldn't be reverted, but still this issue needs to be fixed. It seems Ben isn't registered here at kernel bugzilla. I will drop him a mail about this.
Created attachment 52722 [details] slight lock reordering from Ben Could you please test the attached patch? It should fix the problem, but as I'm physically away from my nvidia machine I could not test it myself.
Sorry for being unclear, it's a regression from 2.6.37 to 2.6.38. Compiling a kernel with the patch now.
Patch doesn't help, lockdep output looks the same as before (to me anyway, same locks involved and same complaint).
Created attachment 54522 [details] fix in nouveau tree Could you please try the attached patch? It is already in nouveau tree and should hopefully fix the issue. Just want to make sure if we can close this bug.
I'm now on 2.6.39-rc3 and while the issue persists, the patch doesn't apply.
Actually, that was wrong -- I wasn't booting the kernel I was compiling, 2.6.39-rc3 doesn't work at all, I only get a garbled screen :-(
The Patch from comment #6 has been merged in 2.6.39-rc5. Can you retest with that?
Sorry, I must've missed your email earlier -- I'm now on 2.6.39-rc7 and it doesn't seem to have this issue any more.