Re: [linux-next] RCU: dyntick_idle warnings

2016-11-10 Thread Sergey Senozhatsky 
On (11/10/16 06:54), Paul E. McKenney wrote:
[..]
> Hello, Sergey,
> 
> Should be fixed by 0ea13930e9a8 ("rcu: Maintain special bits at bottom
> of ->dynticks counter"), which should be in -next today.
> 
> And thank you for your testing efforts!

Thanks, Paul! will give it a try.

-ss

Re: [linux-next] RCU: dyntick_idle warnings

2016-11-10 Thread Sergey Senozhatsky 
On (11/10/16 06:54), Paul E. McKenney wrote:
[..]
> Hello, Sergey,
> 
> Should be fixed by 0ea13930e9a8 ("rcu: Maintain special bits at bottom
> of ->dynticks counter"), which should be in -next today.
> 
> And thank you for your testing efforts!

Thanks, Paul! will give it a try.

-ss

Re: [linux-next] RCU: dyntick_idle warnings

2016-11-10 Thread Paul E. McKenney 
On Thu, Nov 10, 2016 at 04:57:19PM +0900, Sergey Senozhatsky wrote:
> Hello Paul,
> 
> x86_64, linux-next 20161110
> 
> WARN_ON_ONCE(!(special & RCU_DYNTICK_CTRL_CTR));
> 
> [0.436242] [ cut here ]
> [0.436307] WARNING: CPU: 3 PID: 0 at kernel/rcu/tree.c:380 
> rcu_momentary_dyntick_idle+0xa7/0xb8
> [0.436381] Modules linked in:
> [0.436437] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 
> 4.9.0-rc4-next-20161110-dbg-1-g0d7df5d-dirty #863
> [0.436513] Hardware name: SAMSUNG ELECTRONICS CO.,LTD Samsung DeskTop 
> System/Samsung DeskTop System, BIOS 05CC   04/09/2010
> [0.436595] Call Trace:
> [0.436651]  dump_stack+0x4d/0x63
> [0.436706]  __warn+0xb8/0xd3
> [0.436760]  warn_slowpath_null+0x18/0x1a
> [0.436815]  rcu_momentary_dyntick_idle+0xa7/0xb8
> [0.436872]  rcu_note_context_switch+0x2c8/0x2d5
> [0.436930]  __schedule+0x62/0x3b6
> [0.436984]  schedule+0x84/0x95
> [0.437038]  schedule_preempt_disabled+0x10/0x19
> [0.437095]  cpu_startup_entry+0x18c/0x191
> [0.437152]  start_secondary+0xef/0xf2
> [0.437207]  start_cpu+0x5/0x14
> [0.437263] ---[ end trace c0bbb435a1f86b8a ]---
> 
> 
> 
> WARN_ON_ONCE(!(atomic_read(>dynticks) & 0x1));
> 
> [0.895911] [ cut here ]
> [0.895966] WARNING: CPU: 0 PID: 1 at kernel/rcu/tree.c:1116 
> rcu_nmi_exit+0x63/0x82
> [0.896026] Modules linked in:^Ac
> [0.896078] CPU: 0 PID: 1 Comm: swapper/0 Tainted: GW   
> 4.9.0-rc4-next-20161110-dbg-1-g0d7df5d-dirty #863
> [0.896157] Hardware name: SAMSUNG ELECTRONICS CO.,LTD Samsung DeskTop 
> System/Samsung DeskTop System, BIOS 05CC   04/09/2010
> [0.896236] Call Trace:
> [0.896287]  
> [0.896338]  dump_stack+0x4d/0x63
> [0.896390]  __warn+0xb8/0xd3
> [0.896442]  warn_slowpath_null+0x18/0x1a
> [0.896495]  rcu_nmi_exit+0x63/0x82
> [0.896548]  do_nmi+0x2b4/0x31f
> [0.896600]  end_repeat_nmi+0x1a/0x1e
> [0.896652] RIP: 0010:ioread32+0xb/0x2f
> [0.896705] RSP: :c90176c0 EFLAGS: 0296^Ac
> [0.896762] RAX: 0004 RBX: 880132868a80 RCX: 
> 
> [0.896820] RDX: 0003 RSI: c9000100e180 RDI: 
> c9000100e180
> [0.896879] RBP: c90176c8 R08: 000a R09: 
> b885
> [0.896938] R10: c90178e8 R11: 8801330b0080 R12: 
> fffb6f2e
> [0.896996] R13: 0006 R14: 005b R15: 
> 88013288f848
> [0.897055]  ? ioread32+0xb/0x2f
> [0.897107]  ? ioread32+0xb/0x2f
> [0.897160]  
> [0.897210]  ? nv50_i2c_bus_sense_scl+0x1f/0x24
> [0.897265]  nvkm_i2c_bus_getscl+0xa/0xc
> [0.897318]  sclhi+0x36/0x6a
> [0.897369]  i2c_outb+0x49/0xcf
> [0.897422]  try_address+0x30/0x6f
> [0.897475]  bit_xfer+0x23a/0x402
> [0.897527]  __i2c_transfer+0x156/0x18b
> [0.897581]  i2c_transfer+0x6e/0x8c
> [0.897634]  ? nvkm_fantog_create+0xcd/0xcd
> [0.897688]  nvkm_i2c_bus_probe+0x141/0x200
> [0.897741]  ? extdev_table+0xa7/0xc6
> [0.897793]  nvkm_therm_ic_ctor+0x141/0x14f
> [0.897847]  ? nvkm_therm_ic_ctor+0x141/0x14f
> [0.897900]  ? nvbios_rd08+0x1a/0x30
> [0.897953]  ? nvbios_therm_sensor_parse+0x97/0x1ca
> [0.898008]  nvkm_therm_oneinit+0x19/0x3b
> [0.898061]  nvkm_subdev_init+0x89/0x195
> [0.898114]  nvkm_device_init+0x145/0x204
> [0.898167]  nvkm_udevice_init+0x2f/0x4a
> [0.898220]  nvkm_object_init+0x71/0x15d
> [0.898273]  nvkm_ioctl_new+0x1aa/0x27a
> [0.898326]  ? nvkm_client_notify+0x22/0x22
> [0.898380]  ? nvkm_udevice_rd08+0x1f/0x1f
> [0.898434]  nvkm_ioctl+0x174/0x1d0
> [0.898487]  nvkm_client_ioctl+0xd/0xf
> [0.898540]  nvif_object_ioctl+0x42/0x44
> [0.898594]  nvif_object_init+0xc4/0x104
> [0.898647]  nvif_device_init+0xd/0x2b
> [0.898700]  nouveau_drm_load+0x269/0x89e
> [0.898753]  drm_dev_register+0x7f/0xc0
> [0.898806]  drm_get_pci_dev+0xf3/0x1bd
> [0.898860]  nouveau_drm_probe+0x1a2/0x1c1
> [0.898913]  pci_device_probe+0x7e/0xe6
> [0.898966]  driver_probe_device+0x130/0x284
> [0.899020]  __driver_attach+0x6a/0x8c
> [0.899074]  ? driver_probe_device+0x284/0x284
> [0.899128]  bus_for_each_dev+0x68/0x80
> [0.899181]  driver_attach+0x19/0x1b
> [0.899234]  bus_add_driver+0xe9/0x1d9
> [0.899287]  driver_register+0x83/0xba
> [0.899340]  ? ttm_init+0x5d/0x5d
> [0.899393]  __pci_register_driver+0x47/0x49
> [0.899446]  drm_pci_init+0x47/0xc8
> [0.899500]  ? ttm_init+0x5d/0x5d
> [0.899552]  ? set_debug_rodata+0x12/0x12
> [0.899605]  nouveau_drm_init+0x1db/0x1dd
> [0.899658]  do_one_initcall+0x8b/0x10e
> [0.899711]  ? set_debug_rodata+0x12/0x12
> [0.899765]  kernel_init_freeable+0x123/0x1ab
> [0.899819]  ? rest_init+0x7d/0x7d
> [0.899871]  kernel_init+0x9/0xeb
> [0.899924]

Re: [linux-next] RCU: dyntick_idle warnings

2016-11-10 Thread Paul E. McKenney 
On Thu, Nov 10, 2016 at 04:57:19PM +0900, Sergey Senozhatsky wrote:
> Hello Paul,
> 
> x86_64, linux-next 20161110
> 
> WARN_ON_ONCE(!(special & RCU_DYNTICK_CTRL_CTR));
> 
> [0.436242] [ cut here ]
> [0.436307] WARNING: CPU: 3 PID: 0 at kernel/rcu/tree.c:380 
> rcu_momentary_dyntick_idle+0xa7/0xb8
> [0.436381] Modules linked in:
> [0.436437] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 
> 4.9.0-rc4-next-20161110-dbg-1-g0d7df5d-dirty #863
> [0.436513] Hardware name: SAMSUNG ELECTRONICS CO.,LTD Samsung DeskTop 
> System/Samsung DeskTop System, BIOS 05CC   04/09/2010
> [0.436595] Call Trace:
> [0.436651]  dump_stack+0x4d/0x63
> [0.436706]  __warn+0xb8/0xd3
> [0.436760]  warn_slowpath_null+0x18/0x1a
> [0.436815]  rcu_momentary_dyntick_idle+0xa7/0xb8
> [0.436872]  rcu_note_context_switch+0x2c8/0x2d5
> [0.436930]  __schedule+0x62/0x3b6
> [0.436984]  schedule+0x84/0x95
> [0.437038]  schedule_preempt_disabled+0x10/0x19
> [0.437095]  cpu_startup_entry+0x18c/0x191
> [0.437152]  start_secondary+0xef/0xf2
> [0.437207]  start_cpu+0x5/0x14
> [0.437263] ---[ end trace c0bbb435a1f86b8a ]---
> 
> 
> 
> WARN_ON_ONCE(!(atomic_read(>dynticks) & 0x1));
> 
> [0.895911] [ cut here ]
> [0.895966] WARNING: CPU: 0 PID: 1 at kernel/rcu/tree.c:1116 
> rcu_nmi_exit+0x63/0x82
> [0.896026] Modules linked in:^Ac
> [0.896078] CPU: 0 PID: 1 Comm: swapper/0 Tainted: GW   
> 4.9.0-rc4-next-20161110-dbg-1-g0d7df5d-dirty #863
> [0.896157] Hardware name: SAMSUNG ELECTRONICS CO.,LTD Samsung DeskTop 
> System/Samsung DeskTop System, BIOS 05CC   04/09/2010
> [0.896236] Call Trace:
> [0.896287]  
> [0.896338]  dump_stack+0x4d/0x63
> [0.896390]  __warn+0xb8/0xd3
> [0.896442]  warn_slowpath_null+0x18/0x1a
> [0.896495]  rcu_nmi_exit+0x63/0x82
> [0.896548]  do_nmi+0x2b4/0x31f
> [0.896600]  end_repeat_nmi+0x1a/0x1e
> [0.896652] RIP: 0010:ioread32+0xb/0x2f
> [0.896705] RSP: :c90176c0 EFLAGS: 0296^Ac
> [0.896762] RAX: 0004 RBX: 880132868a80 RCX: 
> 
> [0.896820] RDX: 0003 RSI: c9000100e180 RDI: 
> c9000100e180
> [0.896879] RBP: c90176c8 R08: 000a R09: 
> b885
> [0.896938] R10: c90178e8 R11: 8801330b0080 R12: 
> fffb6f2e
> [0.896996] R13: 0006 R14: 005b R15: 
> 88013288f848
> [0.897055]  ? ioread32+0xb/0x2f
> [0.897107]  ? ioread32+0xb/0x2f
> [0.897160]  
> [0.897210]  ? nv50_i2c_bus_sense_scl+0x1f/0x24
> [0.897265]  nvkm_i2c_bus_getscl+0xa/0xc
> [0.897318]  sclhi+0x36/0x6a
> [0.897369]  i2c_outb+0x49/0xcf
> [0.897422]  try_address+0x30/0x6f
> [0.897475]  bit_xfer+0x23a/0x402
> [0.897527]  __i2c_transfer+0x156/0x18b
> [0.897581]  i2c_transfer+0x6e/0x8c
> [0.897634]  ? nvkm_fantog_create+0xcd/0xcd
> [0.897688]  nvkm_i2c_bus_probe+0x141/0x200
> [0.897741]  ? extdev_table+0xa7/0xc6
> [0.897793]  nvkm_therm_ic_ctor+0x141/0x14f
> [0.897847]  ? nvkm_therm_ic_ctor+0x141/0x14f
> [0.897900]  ? nvbios_rd08+0x1a/0x30
> [0.897953]  ? nvbios_therm_sensor_parse+0x97/0x1ca
> [0.898008]  nvkm_therm_oneinit+0x19/0x3b
> [0.898061]  nvkm_subdev_init+0x89/0x195
> [0.898114]  nvkm_device_init+0x145/0x204
> [0.898167]  nvkm_udevice_init+0x2f/0x4a
> [0.898220]  nvkm_object_init+0x71/0x15d
> [0.898273]  nvkm_ioctl_new+0x1aa/0x27a
> [0.898326]  ? nvkm_client_notify+0x22/0x22
> [0.898380]  ? nvkm_udevice_rd08+0x1f/0x1f
> [0.898434]  nvkm_ioctl+0x174/0x1d0
> [0.898487]  nvkm_client_ioctl+0xd/0xf
> [0.898540]  nvif_object_ioctl+0x42/0x44
> [0.898594]  nvif_object_init+0xc4/0x104
> [0.898647]  nvif_device_init+0xd/0x2b
> [0.898700]  nouveau_drm_load+0x269/0x89e
> [0.898753]  drm_dev_register+0x7f/0xc0
> [0.898806]  drm_get_pci_dev+0xf3/0x1bd
> [0.898860]  nouveau_drm_probe+0x1a2/0x1c1
> [0.898913]  pci_device_probe+0x7e/0xe6
> [0.898966]  driver_probe_device+0x130/0x284
> [0.899020]  __driver_attach+0x6a/0x8c
> [0.899074]  ? driver_probe_device+0x284/0x284
> [0.899128]  bus_for_each_dev+0x68/0x80
> [0.899181]  driver_attach+0x19/0x1b
> [0.899234]  bus_add_driver+0xe9/0x1d9
> [0.899287]  driver_register+0x83/0xba
> [0.899340]  ? ttm_init+0x5d/0x5d
> [0.899393]  __pci_register_driver+0x47/0x49
> [0.899446]  drm_pci_init+0x47/0xc8
> [0.899500]  ? ttm_init+0x5d/0x5d
> [0.899552]  ? set_debug_rodata+0x12/0x12
> [0.899605]  nouveau_drm_init+0x1db/0x1dd
> [0.899658]  do_one_initcall+0x8b/0x10e
> [0.899711]  ? set_debug_rodata+0x12/0x12
> [0.899765]  kernel_init_freeable+0x123/0x1ab
> [0.899819]  ? rest_init+0x7d/0x7d
> [0.899871]  kernel_init+0x9/0xeb
> [0.899924]

[linux-next] RCU: dyntick_idle warnings

2016-11-09 Thread Sergey Senozhatsky 
Hello Paul,

x86_64, linux-next 20161110

WARN_ON_ONCE(!(special & RCU_DYNTICK_CTRL_CTR));

[0.436242] [ cut here ]
[0.436307] WARNING: CPU: 3 PID: 0 at kernel/rcu/tree.c:380 
rcu_momentary_dyntick_idle+0xa7/0xb8
[0.436381] Modules linked in:
[0.436437] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 
4.9.0-rc4-next-20161110-dbg-1-g0d7df5d-dirty #863
[0.436513] Hardware name: SAMSUNG ELECTRONICS CO.,LTD Samsung DeskTop 
System/Samsung DeskTop System, BIOS 05CC   04/09/2010
[0.436595] Call Trace:
[0.436651]  dump_stack+0x4d/0x63
[0.436706]  __warn+0xb8/0xd3
[0.436760]  warn_slowpath_null+0x18/0x1a
[0.436815]  rcu_momentary_dyntick_idle+0xa7/0xb8
[0.436872]  rcu_note_context_switch+0x2c8/0x2d5
[0.436930]  __schedule+0x62/0x3b6
[0.436984]  schedule+0x84/0x95
[0.437038]  schedule_preempt_disabled+0x10/0x19
[0.437095]  cpu_startup_entry+0x18c/0x191
[0.437152]  start_secondary+0xef/0xf2
[0.437207]  start_cpu+0x5/0x14
[0.437263] ---[ end trace c0bbb435a1f86b8a ]---



WARN_ON_ONCE(!(atomic_read(>dynticks) & 0x1));

[0.895911] [ cut here ]
[0.895966] WARNING: CPU: 0 PID: 1 at kernel/rcu/tree.c:1116 
rcu_nmi_exit+0x63/0x82
[0.896026] Modules linked in:^Ac
[0.896078] CPU: 0 PID: 1 Comm: swapper/0 Tainted: GW   
4.9.0-rc4-next-20161110-dbg-1-g0d7df5d-dirty #863
[0.896157] Hardware name: SAMSUNG ELECTRONICS CO.,LTD Samsung DeskTop 
System/Samsung DeskTop System, BIOS 05CC   04/09/2010
[0.896236] Call Trace:
[0.896287]  
[0.896338]  dump_stack+0x4d/0x63
[0.896390]  __warn+0xb8/0xd3
[0.896442]  warn_slowpath_null+0x18/0x1a
[0.896495]  rcu_nmi_exit+0x63/0x82
[0.896548]  do_nmi+0x2b4/0x31f
[0.896600]  end_repeat_nmi+0x1a/0x1e
[0.896652] RIP: 0010:ioread32+0xb/0x2f
[0.896705] RSP: :c90176c0 EFLAGS: 0296^Ac
[0.896762] RAX: 0004 RBX: 880132868a80 RCX: 
[0.896820] RDX: 0003 RSI: c9000100e180 RDI: c9000100e180
[0.896879] RBP: c90176c8 R08: 000a R09: b885
[0.896938] R10: c90178e8 R11: 8801330b0080 R12: fffb6f2e
[0.896996] R13: 0006 R14: 005b R15: 88013288f848
[0.897055]  ? ioread32+0xb/0x2f
[0.897107]  ? ioread32+0xb/0x2f
[0.897160]  
[0.897210]  ? nv50_i2c_bus_sense_scl+0x1f/0x24
[0.897265]  nvkm_i2c_bus_getscl+0xa/0xc
[0.897318]  sclhi+0x36/0x6a
[0.897369]  i2c_outb+0x49/0xcf
[0.897422]  try_address+0x30/0x6f
[0.897475]  bit_xfer+0x23a/0x402
[0.897527]  __i2c_transfer+0x156/0x18b
[0.897581]  i2c_transfer+0x6e/0x8c
[0.897634]  ? nvkm_fantog_create+0xcd/0xcd
[0.897688]  nvkm_i2c_bus_probe+0x141/0x200
[0.897741]  ? extdev_table+0xa7/0xc6
[0.897793]  nvkm_therm_ic_ctor+0x141/0x14f
[0.897847]  ? nvkm_therm_ic_ctor+0x141/0x14f
[0.897900]  ? nvbios_rd08+0x1a/0x30
[0.897953]  ? nvbios_therm_sensor_parse+0x97/0x1ca
[0.898008]  nvkm_therm_oneinit+0x19/0x3b
[0.898061]  nvkm_subdev_init+0x89/0x195
[0.898114]  nvkm_device_init+0x145/0x204
[0.898167]  nvkm_udevice_init+0x2f/0x4a
[0.898220]  nvkm_object_init+0x71/0x15d
[0.898273]  nvkm_ioctl_new+0x1aa/0x27a
[0.898326]  ? nvkm_client_notify+0x22/0x22
[0.898380]  ? nvkm_udevice_rd08+0x1f/0x1f
[0.898434]  nvkm_ioctl+0x174/0x1d0
[0.898487]  nvkm_client_ioctl+0xd/0xf
[0.898540]  nvif_object_ioctl+0x42/0x44
[0.898594]  nvif_object_init+0xc4/0x104
[0.898647]  nvif_device_init+0xd/0x2b
[0.898700]  nouveau_drm_load+0x269/0x89e
[0.898753]  drm_dev_register+0x7f/0xc0
[0.898806]  drm_get_pci_dev+0xf3/0x1bd
[0.898860]  nouveau_drm_probe+0x1a2/0x1c1
[0.898913]  pci_device_probe+0x7e/0xe6
[0.898966]  driver_probe_device+0x130/0x284
[0.899020]  __driver_attach+0x6a/0x8c
[0.899074]  ? driver_probe_device+0x284/0x284
[0.899128]  bus_for_each_dev+0x68/0x80
[0.899181]  driver_attach+0x19/0x1b
[0.899234]  bus_add_driver+0xe9/0x1d9
[0.899287]  driver_register+0x83/0xba
[0.899340]  ? ttm_init+0x5d/0x5d
[0.899393]  __pci_register_driver+0x47/0x49
[0.899446]  drm_pci_init+0x47/0xc8
[0.899500]  ? ttm_init+0x5d/0x5d
[0.899552]  ? set_debug_rodata+0x12/0x12
[0.899605]  nouveau_drm_init+0x1db/0x1dd
[0.899658]  do_one_initcall+0x8b/0x10e
[0.899711]  ? set_debug_rodata+0x12/0x12
[0.899765]  kernel_init_freeable+0x123/0x1ab
[0.899819]  ? rest_init+0x7d/0x7d
[0.899871]  kernel_init+0x9/0xeb
[0.899924]  ret_from_fork+0x22/0x30
[0.899977] ---[ end trace c0bbb435a1f86b8b ]---

-ss

[linux-next] RCU: dyntick_idle warnings

2016-11-09 Thread Sergey Senozhatsky 
Hello Paul,

x86_64, linux-next 20161110

WARN_ON_ONCE(!(special & RCU_DYNTICK_CTRL_CTR));

[0.436242] [ cut here ]
[0.436307] WARNING: CPU: 3 PID: 0 at kernel/rcu/tree.c:380 
rcu_momentary_dyntick_idle+0xa7/0xb8
[0.436381] Modules linked in:
[0.436437] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 
4.9.0-rc4-next-20161110-dbg-1-g0d7df5d-dirty #863
[0.436513] Hardware name: SAMSUNG ELECTRONICS CO.,LTD Samsung DeskTop 
System/Samsung DeskTop System, BIOS 05CC   04/09/2010
[0.436595] Call Trace:
[0.436651]  dump_stack+0x4d/0x63
[0.436706]  __warn+0xb8/0xd3
[0.436760]  warn_slowpath_null+0x18/0x1a
[0.436815]  rcu_momentary_dyntick_idle+0xa7/0xb8
[0.436872]  rcu_note_context_switch+0x2c8/0x2d5
[0.436930]  __schedule+0x62/0x3b6
[0.436984]  schedule+0x84/0x95
[0.437038]  schedule_preempt_disabled+0x10/0x19
[0.437095]  cpu_startup_entry+0x18c/0x191
[0.437152]  start_secondary+0xef/0xf2
[0.437207]  start_cpu+0x5/0x14
[0.437263] ---[ end trace c0bbb435a1f86b8a ]---



WARN_ON_ONCE(!(atomic_read(>dynticks) & 0x1));

[0.895911] [ cut here ]
[0.895966] WARNING: CPU: 0 PID: 1 at kernel/rcu/tree.c:1116 
rcu_nmi_exit+0x63/0x82
[0.896026] Modules linked in:^Ac
[0.896078] CPU: 0 PID: 1 Comm: swapper/0 Tainted: GW   
4.9.0-rc4-next-20161110-dbg-1-g0d7df5d-dirty #863
[0.896157] Hardware name: SAMSUNG ELECTRONICS CO.,LTD Samsung DeskTop 
System/Samsung DeskTop System, BIOS 05CC   04/09/2010
[0.896236] Call Trace:
[0.896287]  
[0.896338]  dump_stack+0x4d/0x63
[0.896390]  __warn+0xb8/0xd3
[0.896442]  warn_slowpath_null+0x18/0x1a
[0.896495]  rcu_nmi_exit+0x63/0x82
[0.896548]  do_nmi+0x2b4/0x31f
[0.896600]  end_repeat_nmi+0x1a/0x1e
[0.896652] RIP: 0010:ioread32+0xb/0x2f
[0.896705] RSP: :c90176c0 EFLAGS: 0296^Ac
[0.896762] RAX: 0004 RBX: 880132868a80 RCX: 
[0.896820] RDX: 0003 RSI: c9000100e180 RDI: c9000100e180
[0.896879] RBP: c90176c8 R08: 000a R09: b885
[0.896938] R10: c90178e8 R11: 8801330b0080 R12: fffb6f2e
[0.896996] R13: 0006 R14: 005b R15: 88013288f848
[0.897055]  ? ioread32+0xb/0x2f
[0.897107]  ? ioread32+0xb/0x2f
[0.897160]  
[0.897210]  ? nv50_i2c_bus_sense_scl+0x1f/0x24
[0.897265]  nvkm_i2c_bus_getscl+0xa/0xc
[0.897318]  sclhi+0x36/0x6a
[0.897369]  i2c_outb+0x49/0xcf
[0.897422]  try_address+0x30/0x6f
[0.897475]  bit_xfer+0x23a/0x402
[0.897527]  __i2c_transfer+0x156/0x18b
[0.897581]  i2c_transfer+0x6e/0x8c
[0.897634]  ? nvkm_fantog_create+0xcd/0xcd
[0.897688]  nvkm_i2c_bus_probe+0x141/0x200
[0.897741]  ? extdev_table+0xa7/0xc6
[0.897793]  nvkm_therm_ic_ctor+0x141/0x14f
[0.897847]  ? nvkm_therm_ic_ctor+0x141/0x14f
[0.897900]  ? nvbios_rd08+0x1a/0x30
[0.897953]  ? nvbios_therm_sensor_parse+0x97/0x1ca
[0.898008]  nvkm_therm_oneinit+0x19/0x3b
[0.898061]  nvkm_subdev_init+0x89/0x195
[0.898114]  nvkm_device_init+0x145/0x204
[0.898167]  nvkm_udevice_init+0x2f/0x4a
[0.898220]  nvkm_object_init+0x71/0x15d
[0.898273]  nvkm_ioctl_new+0x1aa/0x27a
[0.898326]  ? nvkm_client_notify+0x22/0x22
[0.898380]  ? nvkm_udevice_rd08+0x1f/0x1f
[0.898434]  nvkm_ioctl+0x174/0x1d0
[0.898487]  nvkm_client_ioctl+0xd/0xf
[0.898540]  nvif_object_ioctl+0x42/0x44
[0.898594]  nvif_object_init+0xc4/0x104
[0.898647]  nvif_device_init+0xd/0x2b
[0.898700]  nouveau_drm_load+0x269/0x89e
[0.898753]  drm_dev_register+0x7f/0xc0
[0.898806]  drm_get_pci_dev+0xf3/0x1bd
[0.898860]  nouveau_drm_probe+0x1a2/0x1c1
[0.898913]  pci_device_probe+0x7e/0xe6
[0.898966]  driver_probe_device+0x130/0x284
[0.899020]  __driver_attach+0x6a/0x8c
[0.899074]  ? driver_probe_device+0x284/0x284
[0.899128]  bus_for_each_dev+0x68/0x80
[0.899181]  driver_attach+0x19/0x1b
[0.899234]  bus_add_driver+0xe9/0x1d9
[0.899287]  driver_register+0x83/0xba
[0.899340]  ? ttm_init+0x5d/0x5d
[0.899393]  __pci_register_driver+0x47/0x49
[0.899446]  drm_pci_init+0x47/0xc8
[0.899500]  ? ttm_init+0x5d/0x5d
[0.899552]  ? set_debug_rodata+0x12/0x12
[0.899605]  nouveau_drm_init+0x1db/0x1dd
[0.899658]  do_one_initcall+0x8b/0x10e
[0.899711]  ? set_debug_rodata+0x12/0x12
[0.899765]  kernel_init_freeable+0x123/0x1ab
[0.899819]  ? rest_init+0x7d/0x7d
[0.899871]  kernel_init+0x9/0xeb
[0.899924]  ret_from_fork+0x22/0x30
[0.899977] ---[ end trace c0bbb435a1f86b8b ]---

-ss