Re: nouveau lockdep splat

From: Lucas Stach
Date: Tue Mar 05 2013 - 11:40:21 EST

Dropping Tegra ML, it's not the place where Nouveau mails should go.
Adding Nouveau ML and Maarten, who probably knows Lockdep+Nouveau best.

Am Montag, den 04.03.2013, 22:16 +0100 schrieb Borislav Petkov:
> New -rc1, so let the stabilization games begin.
>
> I see the following on rc1, let me know if you need more info.
>
>
> [ 0.633617] =============================================
> [ 0.633618] [ INFO: possible recursive locking detected ]
> [ 0.633618] 3.9.0-rc1 #2 Not tainted
> [ 0.633619] ---------------------------------------------
> [ 0.633619] swapper/0/1 is trying to acquire lock:
> [ 0.633623] (&dmac->lock){+.+...}, at: [<ffffffff8141bb53>] evo_wait+0x43/0xf0
> [ 0.633624]
> [ 0.633624] but task is already holding lock:
> [ 0.633626] (&dmac->lock){+.+...}, at: [<ffffffff8141bb53>] evo_wait+0x43/0xf0
> [ 0.633626]
> [ 0.633626] other info that might help us debug this:
> [ 0.633626] Possible unsafe locking scenario:
> [ 0.633626]
> [ 0.633626] CPU0
> [ 0.633627] ----
> [ 0.633627] lock(&dmac->lock);
> [ 0.633628] lock(&dmac->lock);
> [ 0.633628]
> [ 0.633628] *** DEADLOCK ***
> [ 0.633628]
> [ 0.633628] May be due to missing lock nesting notation
> [ 0.633628]
> [ 0.633629] 10 locks held by swapper/0/1:
> [ 0.633632] #0: (&__lockdep_no_validate__){......}, at: [<ffffffff8143375b>] __driver_attach+0x5b/0xb0
> [ 0.633633] #1: (&__lockdep_no_validate__){......}, at: [<ffffffff81433769>] __driver_attach+0x69/0xb0
> [ 0.633636] #2: (drm_global_mutex){+.+.+.}, at: [<ffffffff8135a8f6>] drm_get_pci_dev+0xc6/0x2d0
> [ 0.633640] #3: (registration_lock){+.+.+.}, at: [<ffffffff812c8e75>] register_framebuffer+0x25/0x310
> [ 0.633642] #4: (&fb_info->lock){+.+.+.}, at: [<ffffffff812c7d86>] lock_fb_info+0x26/0x60
> [ 0.633644] #5: (console_lock){+.+.+.}, at: [<ffffffff812c900a>] register_framebuffer+0x1ba/0x310
> [ 0.633646] #6: ((fb_notifier_list).rwsem){.+.+.+}, at: [<ffffffff810694d2>] __blocking_notifier_call_chain+0x42/0x80
> [ 0.633648] #7: (&dev->mode_config.mutex){+.+.+.}, at: [<ffffffff8135e63a>] drm_modeset_lock_all+0x2a/0x70
> [ 0.633650] #8: (&crtc->mutex){+.+.+.}, at: [<ffffffff8135e664>] drm_modeset_lock_all+0x54/0x70
> [ 0.633652] #9: (&dmac->lock){+.+...}, at: [<ffffffff8141bb53>] evo_wait+0x43/0xf0
> [ 0.633652]
> [ 0.633652] stack backtrace:
> [ 0.633653] Pid: 1, comm: swapper/0 Not tainted 3.9.0-rc1 #2
> [ 0.633654] Call Trace:
> [ 0.633656] [<ffffffff8109524b>] __lock_acquire+0x76b/0x1c20
> [ 0.633658] [<ffffffff8137f50c>] ? dcb_table+0x1ac/0x2a0
> [ 0.633659] [<ffffffff8141bb53>] ? evo_wait+0x43/0xf0
> [ 0.633660] [<ffffffff81096c6a>] lock_acquire+0x8a/0x120
> [ 0.633662] [<ffffffff8141bb53>] ? evo_wait+0x43/0xf0
> [ 0.633664] [<ffffffff815eaf52>] ? mutex_lock_nested+0x292/0x330
> [ 0.633665] [<ffffffff815ead2e>] mutex_lock_nested+0x6e/0x330
> [ 0.633667] [<ffffffff8141bb53>] ? evo_wait+0x43/0xf0
> [ 0.633668] [<ffffffff815eb0b7>] ? __mutex_unlock_slowpath+0xc7/0x150
> [ 0.633669] [<ffffffff8141bb53>] evo_wait+0x43/0xf0
> [ 0.633671] [<ffffffff8141e569>] nv50_display_flip_next+0x749/0x7d0
> [ 0.633672] [<ffffffff8141bc37>] ? evo_kick+0x37/0x40
> [ 0.633674] [<ffffffff8141e7ee>] nv50_crtc_commit+0x10e/0x230
> [ 0.633676] [<ffffffff8134c2a5>] drm_crtc_helper_set_mode+0x365/0x510
> [ 0.633677] [<ffffffff8134d69e>] drm_crtc_helper_set_config+0xa4e/0xb70
> [ 0.633679] [<ffffffff8135f751>] drm_mode_set_config_internal+0x31/0x70
> [ 0.633680] [<ffffffff8134b7a1>] drm_fb_helper_set_par+0x71/0xf0
> [ 0.633682] [<ffffffff812d40e4>] fbcon_init+0x514/0x5a0
> [ 0.633683] [<ffffffff8132cbdc>] visual_init+0xbc/0x120
> [ 0.633685] [<ffffffff8132f293>] do_bind_con_driver+0x163/0x320
> [ 0.633686] [<ffffffff8132f521>] do_take_over_console+0x61/0x70
> [ 0.633687] [<ffffffff812d2703>] do_fbcon_takeover+0x63/0xc0
> [ 0.633689] [<ffffffff812d63dd>] fbcon_event_notify+0x5fd/0x700
> [ 0.633690] [<ffffffff815f23fd>] notifier_call_chain+0x4d/0x70
> [ 0.633691] [<ffffffff810694e8>] __blocking_notifier_call_chain+0x58/0x80
> [ 0.633692] [<ffffffff81069526>] blocking_notifier_call_chain+0x16/0x20
> [ 0.633694] [<ffffffff812c787b>] fb_notifier_call_chain+0x1b/0x20
> [ 0.633695] [<ffffffff812c9018>] register_framebuffer+0x1c8/0x310
> [ 0.633696] [<ffffffff8134b4d1>] drm_fb_helper_initial_config+0x371/0x520
> [ 0.633697] [<ffffffff8134a607>] ? drm_fb_helper_single_add_all_connectors+0x47/0xf0
> [ 0.633700] [<ffffffff81140a5e>] ? kmem_cache_alloc_trace+0xee/0x150
> [ 0.633701] [<ffffffff8140578e>] nouveau_fbcon_init+0x10e/0x160
> [ 0.633703] [<ffffffff813f5f8a>] nouveau_drm_load+0x40a/0x5d0
> [ 0.633705] [<ffffffff81430cee>] ? device_register+0x1e/0x30
> [ 0.633706] [<ffffffff8135c086>] ? drm_sysfs_device_add+0x86/0xb0
> [ 0.633708] [<ffffffff8135a9b6>] drm_get_pci_dev+0x186/0x2d0
> [ 0.633710] [<ffffffff812b0eab>] ? __pci_set_master+0x2b/0x90
> [ 0.633711] [<ffffffff813f63ba>] nouveau_drm_probe+0x26a/0x2c0
> [ 0.633713] [<ffffffff812b4f15>] ? pci_match_device+0xd5/0xe0
> [ 0.633714] [<ffffffff812b5096>] pci_device_probe+0x136/0x150
> [ 0.633715] [<ffffffff81433566>] driver_probe_device+0x76/0x210
> [ 0.633716] [<ffffffff814337ab>] __driver_attach+0xab/0xb0
> [ 0.633717] [<ffffffff81433700>] ? driver_probe_device+0x210/0x210
> [ 0.633718] [<ffffffff8143175d>] bus_for_each_dev+0x5d/0xa0
> [ 0.633719] [<ffffffff81432fae>] driver_attach+0x1e/0x20
> [ 0.633720] [<ffffffff81432b91>] bus_add_driver+0x111/0x280
> [ 0.633722] [<ffffffff81b21cf6>] ? ttm_init+0x62/0x62
> [ 0.633724] [<ffffffff81433e67>] driver_register+0x77/0x170
> [ 0.633725] [<ffffffff81b21cf6>] ? ttm_init+0x62/0x62
> [ 0.633726] [<ffffffff812b4054>] __pci_register_driver+0x64/0x70
> [ 0.633728] [<ffffffff8135ac15>] drm_pci_init+0x115/0x130
> [ 0.633729] [<ffffffff81b21cf6>] ? ttm_init+0x62/0x62
> [ 0.633730] [<ffffffff81b21cf6>] ? ttm_init+0x62/0x62
> [ 0.633731] [<ffffffff81b21d43>] nouveau_drm_init+0x4d/0x4f
> [ 0.633732] [<ffffffff81000312>] do_one_initcall+0x122/0x170
> [ 0.633734] [<ffffffff81af6f49>] kernel_init_freeable+0x108/0x197
> [ 0.633735] [<ffffffff81af681c>] ? do_early_param+0x8c/0x8c
> [ 0.633737] [<ffffffff815d4d20>] ? rest_init+0xe0/0xe0
> [ 0.633738] [<ffffffff815d4d2e>] kernel_init+0xe/0xf0
> [ 0.633740] [<ffffffff815f6b1c>] ret_from_fork+0x7c/0xb0
> [ 0.633741] [<ffffffff815d4d20>] ? rest_init+0xe0/0xe0
>


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