GitHub/LineageOS/android_kernel_motorola_exynos9610.git
8 years agodrm/amd/amdgpu: Convert ring debugfs entries to binary
Tom St Denis [Wed, 27 Apr 2016 16:41:16 +0000 (12:41 -0400)]
drm/amd/amdgpu: Convert ring debugfs entries to binary

They now emit ring data in binary which will be read/written by
the userspace tool umr shortly.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/radeon: drop explicit pci D3/D0 setting for ATPX power control
Alex Deucher [Thu, 2 Jun 2016 13:31:59 +0000 (09:31 -0400)]
drm/radeon: drop explicit pci D3/D0 setting for ATPX power control

The ATPX power control method does this for you.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/radeon/atpx: hybrid platforms use d3cold
Alex Deucher [Thu, 2 Jun 2016 13:27:03 +0000 (09:27 -0400)]
drm/radeon/atpx: hybrid platforms use d3cold

The platform d3 cold is used to power down the dGPU.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/radeon/atpx: track whether if this is a hybrid graphics platform
Alex Deucher [Thu, 2 Jun 2016 13:24:53 +0000 (09:24 -0400)]
drm/radeon/atpx: track whether if this is a hybrid graphics platform

hybrid graphics in this case refers to systems which use the new
platform d3 cold ACPI methods as opposed to ATPX for dGPU power
control.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: drop explicit pci D3/D0 setting for ATPX power control
Alex Deucher [Thu, 2 Jun 2016 13:18:34 +0000 (09:18 -0400)]
drm/amdgpu: drop explicit pci D3/D0 setting for ATPX power control

The ATPX power control method does this for you.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu/atpx: hybrid platforms use d3cold
Alex Deucher [Thu, 2 Jun 2016 13:08:32 +0000 (09:08 -0400)]
drm/amdgpu/atpx: hybrid platforms use d3cold

The platform d3 cold is used to power down the dGPU.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu/atpx: track whether if this is a hybrid graphics platform
Alex Deucher [Thu, 2 Jun 2016 13:04:01 +0000 (09:04 -0400)]
drm/amdgpu/atpx: track whether if this is a hybrid graphics platform

hybrid graphics in this case refers to systems which use the new
platform d3 cold ACPI methods as opposed to ATPX for dGPU power
control.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/radeon/atpx: drop forcing of dGPU power control
Alex Deucher [Wed, 1 Jun 2016 19:13:24 +0000 (15:13 -0400)]
drm/radeon/atpx: drop forcing of dGPU power control

Now that we handle this correctly, there is no need to force
it.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/radeon: use PCI_D3hot for PX systems without dGPU power control
Alex Deucher [Wed, 1 Jun 2016 19:07:44 +0000 (15:07 -0400)]
drm/radeon: use PCI_D3hot for PX systems without dGPU power control

On PX systems without dGPU power control, use PCI_D3hot.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/radeon/atpx: add a query for ATPX dGPU power control
Alex Deucher [Wed, 1 Jun 2016 19:05:05 +0000 (15:05 -0400)]
drm/radeon/atpx: add a query for ATPX dGPU power control

The runtime pm sequence is different depending on whether or
not the platform supports ATPX dGPU power control.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/radeon: add a delay after ATPX dGPU power off
Alex Deucher [Wed, 1 Jun 2016 16:58:36 +0000 (12:58 -0400)]
drm/radeon: add a delay after ATPX dGPU power off

ATPX dGPU power control requires a 200ms delay between
power off and on.  This should fix dGPU failures on
resume from power off.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
8 years agodrm/radeon: clean up atpx power control handling
Alex Deucher [Wed, 1 Jun 2016 16:47:38 +0000 (12:47 -0400)]
drm/radeon: clean up atpx power control handling

The presence of the power control method should be determined
via the presence of the method in function 0.  However, some
sbioses only set the appropriate bits in function 1 so use
then to override a missing power control function.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/radeon: disable power control on hybrid laptops
Alex Deucher [Wed, 1 Jun 2016 16:20:16 +0000 (12:20 -0400)]
drm/radeon: disable power control on hybrid laptops

Windows 10 (and some 8.1) systems use standardized
ACPI calls for hybrid laptops to control dGPU power.
Detect those cases and disable the AMD specific ATPX
power control.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu/atpx: drop forcing of dGPU power control
Alex Deucher [Wed, 1 Jun 2016 17:14:48 +0000 (13:14 -0400)]
drm/amdgpu/atpx: drop forcing of dGPU power control

Now that we handle this correctly, there is no need to force
it.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: use PCI_D3hot for PX systems without dGPU power control
Alex Deucher [Wed, 1 Jun 2016 17:12:25 +0000 (13:12 -0400)]
drm/amdgpu: use PCI_D3hot for PX systems without dGPU power control

On PX systems without dGPU power control, use PCI_D3hot.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu/atpx: add a query for ATPX dGPU power control
Alex Deucher [Wed, 1 Jun 2016 17:08:21 +0000 (13:08 -0400)]
drm/amdgpu/atpx: add a query for ATPX dGPU power control

The runtime pm sequence is different depending on whether or
not the platform supports ATPX dGPU power control.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: add a delay after ATPX dGPU power off
Alex Deucher [Wed, 1 Jun 2016 16:54:33 +0000 (12:54 -0400)]
drm/amdgpu: add a delay after ATPX dGPU power off

ATPX dGPU power control requires a 200ms delay between
power off and on.  This should fix dGPU failures on
resume from power off.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
8 years agodrm/amdgpu: clean up atpx power control handling
Alex Deucher [Wed, 1 Jun 2016 16:42:35 +0000 (12:42 -0400)]
drm/amdgpu: clean up atpx power control handling

The presence of the power control method should be determined
via the presence of the method in function 0.  However, some
sbioses only set the appropriate bits in function 1 so use
then to override a missing power control function.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: disable power control on hybrid laptops
Alex Deucher [Wed, 1 Jun 2016 16:28:13 +0000 (12:28 -0400)]
drm/amdgpu: disable power control on hybrid laptops

Windows 10 (and some 8.1) systems use standardized
ACPI calls for hybrid laptops to control dGPU power.
Detect those cases and disable the AMD specific ATPX
power control.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/radeon: allow PACKET3_PFP_SYNC_ME on evergreen
Edmondo Tommasina [Mon, 30 May 2016 23:11:14 +0000 (01:11 +0200)]
drm/radeon: allow PACKET3_PFP_SYNC_ME on evergreen

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Edmondo Tommasina <edmondo.tommasina@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu/gfx8: Add serdes wait for idle in CGCG en/disable
Tom St Denis [Thu, 26 May 2016 13:47:44 +0000 (09:47 -0400)]
drm/amdgpu/gfx8: Add serdes wait for idle in CGCG en/disable

Must wait for SERDES idle before exiting RLC SAFEMODE

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amd/powerplay: add mclk OD(overdrive) support for Polaris10
Eric Huang [Tue, 24 May 2016 20:22:34 +0000 (16:22 -0400)]
drm/amd/powerplay: add mclk OD(overdrive) support for Polaris10

The maximum OD percentage is 20.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amd/powerplay: add mclk OD(overdrive) support for Fiji
Eric Huang [Tue, 24 May 2016 20:14:50 +0000 (16:14 -0400)]
drm/amd/powerplay: add mclk OD(overdrive) support for Fiji

The maximum OD percentage is 20.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amd/powerplay: add mclk OD(overdrive) support for Tonga
Eric Huang [Tue, 24 May 2016 20:13:25 +0000 (16:13 -0400)]
drm/amd/powerplay: add mclk OD(overdrive) support for Tonga

The maximum OD percentage is 20.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: add mclk OD(overdrive) support for CI
Eric Huang [Tue, 24 May 2016 19:43:53 +0000 (15:43 -0400)]
drm/amdgpu: add mclk OD(overdrive) support for CI

The maximum OD percentage is 20.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: add the common code to support mclk OD
Eric Huang [Tue, 24 May 2016 19:11:17 +0000 (15:11 -0400)]
drm/amdgpu: add the common code to support mclk OD

This implements mclk OverDrive(OD) through sysfs.
The new entry pp_mclk_od is read/write. The value of input/output
is an integer of the overclocking percentage.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: add powercontainment module parameter
Huang Rui [Tue, 24 May 2016 05:47:05 +0000 (13:47 +0800)]
drm/amdgpu: add powercontainment module parameter

This patch makes powercontainment feature configurable. Currently, the
powercontainment is not very stable, so add a module parameter to
enable/disable it via user mode.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: fix and cleanup job destruction
Christian König [Thu, 19 May 2016 07:54:15 +0000 (09:54 +0200)]
drm/amdgpu: fix and cleanup job destruction

Remove the job reference counting and just properly destroy it from a
work item which blocks on any potential running timeout handler.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk.Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: move locking into the functions who need it
Christian König [Wed, 18 May 2016 13:40:58 +0000 (15:40 +0200)]
drm/amdgpu: move locking into the functions who need it

Otherwise the locking becomes rather confusing.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk.Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: properly abstract scheduler timeout handling
Christian König [Wed, 18 May 2016 12:19:32 +0000 (14:19 +0200)]
drm/amdgpu: properly abstract scheduler timeout handling

The driver shouldn't mess with the scheduler internals.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk.Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: remove use_shed hack in job cleanup
Christian König [Wed, 18 May 2016 11:12:12 +0000 (13:12 +0200)]
drm/amdgpu: remove use_shed hack in job cleanup

Remembering the code path in a variable to cleanup
differently is usually not a good idea at all.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk.Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: fix coding style in amdgpu_job_free
Christian König [Wed, 18 May 2016 11:09:47 +0000 (13:09 +0200)]
drm/amdgpu: fix coding style in amdgpu_job_free

Ther should be a new line between code and decleration.
Also use amdgpu_ib_free() instead of releasing the member manually.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk.Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: remove duplicated timeout callback
Christian König [Wed, 18 May 2016 11:04:02 +0000 (13:04 +0200)]
drm/amdgpu: remove duplicated timeout callback

No need for double housekeeping here.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk.Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: remove begin_job/finish_job
Christian König [Wed, 18 May 2016 11:00:38 +0000 (13:00 +0200)]
drm/amdgpu: remove begin_job/finish_job

Completely pointless and confusing to use a callback
to call into the same code file.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk.Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: fix coding style in the scheduler v2
Christian König [Wed, 18 May 2016 07:43:07 +0000 (09:43 +0200)]
drm/amdgpu: fix coding style in the scheduler v2

v2: fix even more

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk.Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: add the CI code to enable sclk OD(OverDrive)
Eric Huang [Thu, 19 May 2016 19:54:35 +0000 (15:54 -0400)]
drm/amdgpu: add the CI code to enable sclk OD(OverDrive)

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: add the CI code to enable clock level selection
Eric Huang [Thu, 19 May 2016 19:50:09 +0000 (15:50 -0400)]
drm/amdgpu: add the CI code to enable clock level selection

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: add the new common pm code to support sclk OD
Eric Huang [Thu, 19 May 2016 19:46:10 +0000 (15:46 -0400)]
drm/amdgpu: add the new common pm code to support sclk OD

This extends OD (OverDrive) support to the non-Powerplay code paths.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: add the new common pm code to select the clock levels
Eric Huang [Thu, 19 May 2016 19:41:25 +0000 (15:41 -0400)]
drm/amdgpu: add the new common pm code to select the clock levels

This extends dpm clock level selection to the non-powerplay code paths.
This interface can be used to select individual clock levels.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu/gfx8: Enable GFX PG on CZ
Tom St Denis [Tue, 17 May 2016 11:40:16 +0000 (07:40 -0400)]
drm/amdgpu/gfx8: Enable GFX PG on CZ

Based on Alex's patches this enables GFX PG on CZ.

Tested with xonotic-glx/glxgears/supertuxkart and idle desktop.
Also read-back registers via umr for verificiation that the bits
are truly enabled.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu/gfx8: clean up polaris11 PG enable
Alex Deucher [Wed, 4 May 2016 14:13:35 +0000 (10:13 -0400)]
drm/amdgpu/gfx8: clean up polaris11 PG enable

Fix the logic for enabling/disabling.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu/gfx8: add powergating support for CZ/ST
Alex Deucher [Wed, 4 May 2016 14:07:22 +0000 (10:07 -0400)]
drm/amdgpu/gfx8: add powergating support for CZ/ST

This implements powergating support for CZ/ST asics.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: add new GFX powergating types
Alex Deucher [Wed, 4 May 2016 14:06:21 +0000 (10:06 -0400)]
drm/amdgpu: add new GFX powergating types

Add some new GFX powergating flags.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu/gfx8: rename some pg functions
Alex Deucher [Tue, 3 May 2016 22:13:45 +0000 (18:13 -0400)]
drm/amdgpu/gfx8: rename some pg functions

So they can be shared with other asics.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu/gfx8: add state setup for CZ/ST GFX power gating
Alex Deucher [Tue, 3 May 2016 21:39:32 +0000 (17:39 -0400)]
drm/amdgpu/gfx8: add state setup for CZ/ST GFX power gating

This sets up the CP jump table and GDS buffer and sets the
PG state registers.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/radeon/gfx7: expand cp jt size to handle GDS as well
Alex Deucher [Tue, 3 May 2016 21:48:41 +0000 (17:48 -0400)]
drm/radeon/gfx7: expand cp jt size to handle GDS as well

The size needs to handle the CP JT and GDS.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu/gfx7: expand cp jt size to handle GDS as well
Alex Deucher [Tue, 3 May 2016 21:45:18 +0000 (17:45 -0400)]
drm/amdgpu/gfx7: expand cp jt size to handle GDS as well

The size needs to handle the CP JT and GDS.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amd/powerplay: add sclk OD support on Polaris10
Eric Huang [Thu, 12 May 2016 19:19:10 +0000 (15:19 -0400)]
drm/amd/powerplay: add sclk OD support on Polaris10

This implements sclk overdrive(OD) overclocking support for Polaris10,
and the maximum overdrive percentage is 20.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amd/powerplay: add sclk OD support on Tonga
Eric Huang [Thu, 12 May 2016 19:10:49 +0000 (15:10 -0400)]
drm/amd/powerplay: add sclk OD support on Tonga

This implements sclk overdrive(OD) overclocking support for Tonga,
and the maximum overdrive percentage is 20.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amd/powerplay: add sclk OD support on Fiji
Eric Huang [Thu, 12 May 2016 19:06:10 +0000 (15:06 -0400)]
drm/amd/powerplay: add sclk OD support on Fiji

This implements sclk overdrive(OD) overclocking support for Fiji,
and the maximum overdrive percentage is 20.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: add powerplay sclk OD support through sysfs (v2)
Eric Huang [Thu, 12 May 2016 18:51:21 +0000 (14:51 -0400)]
drm/amdgpu: add powerplay sclk OD support through sysfs (v2)

Add a new sysfs entry pp_sclk_od to support sclk overdrive(OD) overclocking,
the entry is read/write, the value of input/output is an integer which is the
over percentage of the highest sclk.

v2: drop extra semicolon

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/radeon: load different smc firmware on some CI variants
Alex Deucher [Thu, 10 Dec 2015 04:55:45 +0000 (23:55 -0500)]
drm/radeon: load different smc firmware on some CI variants

The power tables on some variants require different firmware.
This may fix stability issues on some newer CI parts.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=91880

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/radeon: load different smc firmware on some SI variants
Alex Deucher [Thu, 10 Dec 2015 04:48:11 +0000 (23:48 -0500)]
drm/radeon: load different smc firmware on some SI variants

The power tables on some variants require different firmware.
This may fix stability issues on some newer SI parts.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: load different smc firmware on some CI variants
Alex Deucher [Thu, 10 Dec 2015 05:49:32 +0000 (00:49 -0500)]
drm/amdgpu: load different smc firmware on some CI variants

The power tables on some variants require different firmware.
This fixes stability issues on some newer CI parts.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=91880

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agodrm/amdgpu: clear RB at ring init
Monk Liu [Wed, 1 Jun 2016 21:37:21 +0000 (17:37 -0400)]
drm/amdgpu: clear RB at ring init

This help fix reloading driver hang issue of SDMA
ring.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
8 years agoMerge tag 'asoc-hdmi-codec-pdata' of git://git.kernel.org/pub/scm/linux/kernel/git...
Dave Airlie [Mon, 4 Jul 2016 23:43:02 +0000 (09:43 +1000)]
Merge tag 'asoc-hdmi-codec-pdata' of git://git./linux/kernel/git/broonie/sound into drm-next

ASoC: Add private data for HDMI CODEC callbacks

Allow the HDMI CODECs to get private data passed in in callbacks.

[airlied:
Add STI/mediatek patches from Arnd for drivers merged later in drm tree.]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
* tag 'asoc-hdmi-codec-pdata' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound:
  ASoC: hdmi-codec: callback function will be called with private data

8 years agoMerge branch 'for-next' of http://git.agner.ch/git/linux-drm-fsl-dcu into drm-next
Dave Airlie [Sat, 2 Jul 2016 06:21:35 +0000 (16:21 +1000)]
Merge branch 'for-next' of git.agner.ch/git/linux-drm-fsl-dcu into drm-next

The patchset contains a new helper in drm_fb_cma_helper.c for suspend/
resume when using cma backed framebuffers.

* 'for-next' of http://git.agner.ch/git/linux-drm-fsl-dcu:
  drm/fsl-dcu: disable vblank events on CRTC disable
  drm/fsl-dcu: implement suspend/resume using atomic helpers
  drm/fsl-dcu: use clk helpers
  drm/fsl-dcu: move layer initialization to plane file
  drm/fsl-dcu: store layer registers in soc_data
  drm/fb_cma_helper: add suspend helper

8 years agoBack-merge tag 'v4.7-rc5' into drm-next
Dave Airlie [Sat, 2 Jul 2016 05:56:01 +0000 (15:56 +1000)]
Back-merge tag 'v4.7-rc5' into drm-next

Linux 4.7-rc5

The fsl-dcu pull needs -rc3 so go to -rc5 for now.

8 years agoMerge branch 'sti-drm-next-2016-06-30' of http://git.linaro.org/people/benjamin.gaign...
Dave Airlie [Sat, 2 Jul 2016 05:51:46 +0000 (15:51 +1000)]
Merge branch 'sti-drm-next-2016-06-30' of git.linaro.org/people/benjamin.gaignard/kernel into drm-next

This pull request include 3 minors fix and one feature evolution
around ASoC hdmi codec support.

* 'sti-drm-next-2016-06-30' of http://git.linaro.org/people/benjamin.gaignard/kernel:
  drm: sti: Add ASoC generic hdmi codec support.
  drm/sti: adjust delay for AWG
  drm: sti: fix clocking issues in crtc
  drm/sti: Use 64-bit timestamps

8 years agodrm: sti: Add ASoC generic hdmi codec support.
Arnaud Pouliquen [Mon, 30 May 2016 13:31:37 +0000 (15:31 +0200)]
drm: sti: Add ASoC generic hdmi codec support.

Add the interface needed by audio hdmi-codec driver.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
8 years agoASoC: hdmi-codec: callback function will be called with private data
Kuninori Morimoto [Fri, 24 Jun 2016 02:47:55 +0000 (02:47 +0000)]
ASoC: hdmi-codec: callback function will be called with private data

Current hdmi-codec driver is assuming that it will be registered
from HDMI driver. Because of this assumption, each callback function
has struct device pointer which is parent device (= HDMI).
Then, it can use dev_get_drvdata() to get private data.

OTOH, on some SoC/HDMI case, SoC has VIDEO/SOUND and HDMI IPs.
This case, it needs SoC VIDEO, SoC SOUND and HDMI video, HDMI codec
driver. In DesignWare HDMI IP case, SoC VIDEO (= DRM/KMS) driver tries
to bind DesignWare HDMI video driver, and HDMI codec driver
(= hdmi-codec). This case, above "parent device" of HDMI codec driver
is DRM/KMS driver and its "device" already has private data.

And, from DT and ASoC CPU/Codec/Card binding point of view, HDMI codec
(= hdmi-codec) needs to have "parent device" (= DRM/KMS), otherwise,
it never detect sound card.

Because of these reasons, some driver can't use dev_get_drvdata() to
get private data on hdmi-codec driver. This patch add new void pointer
on hdmi_codec_pdata for private data, and callback function will be
called with it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
8 years agodrm/sti: adjust delay for AWG
Bich Hemon [Tue, 15 Mar 2016 16:11:14 +0000 (17:11 +0100)]
drm/sti: adjust delay for AWG

Compensate delay introduced by AWG IP during DE generation

Signed-off-by: Bich Hemon <bich.hemon@st.com>
Reviewed-by: Vincent ABRIOU <vincent.abriou@st.com>
8 years agodrm: sti: fix clocking issues in crtc
Benjamin Gaignard [Thu, 26 May 2016 08:39:20 +0000 (10:39 +0200)]
drm: sti: fix clocking issues in crtc

fix and simplify clock management in crtc to avoid unbalanced
call to clk_prepare_enable and clk_disable_unprepare functions
remove unused functions

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
8 years agodrm/sti: Use 64-bit timestamps
Tina Ruchandani [Wed, 13 Apr 2016 09:28:02 +0000 (02:28 -0700)]
drm/sti: Use 64-bit timestamps

'struct timespec' uses a 32-bit field for seconds, which
will overflow in year 2038 and beyond. This patch is part
of a larger attempt to remove instances of timeval, timespec
and time_t, all of which suffer from the y2038 issue, from the
kernel.

Signed-off-by: Tina Ruchandani <ruchandani.tina@gmail.com>
8 years agoLinux 4.7-rc5
Linus Torvalds [Mon, 27 Jun 2016 00:52:03 +0000 (17:52 -0700)]
Linux 4.7-rc5

8 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sun, 26 Jun 2016 17:08:49 +0000 (10:08 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Two straightforward fixes.

  One is a concurrency issue only affecting SAS connected SATA drives,
  but which could hang the storage subsystem if it triggers (because the
  outstanding command count on error never goes back to zero) and the
  other is a NO_TAG fallout from the switch to hostwide tags which
  causes the system to crash on module insertion (we've checked
  carefully and only the 53c700 family of drivers is vulnerable to this
  issue)"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  53c700: fix BUG on untagged commands
  scsi: fix race between simultaneous decrements of ->host_failed

8 years agoMerge branch 'for-linus-4.7-part2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 25 Jun 2016 15:53:38 +0000 (08:53 -0700)]
Merge branch 'for-linus-4.7-part2' of git://git./linux/kernel/git/mason/linux-btrfs

Pull btrfs fixes part 2 from Chris Mason:
 "This has one patch from Omar to bring iterate_shared back to btrfs.

  We have a tree of work we queue up for directory items and it doesn't
  lend itself well to shared access.  While we're cleaning it up, Omar
  has changed things to use an exclusive lock when there are delayed
  items"

* 'for-linus-4.7-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: fix ->iterate_shared() by upgrading i_rwsem for delayed nodes

8 years agoMerge branch 'for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
Linus Torvalds [Sat, 25 Jun 2016 15:42:31 +0000 (08:42 -0700)]
Merge branch 'for-linus-4.7' of git://git./linux/kernel/git/mason/linux-btrfs

Pull btrfs fixes from Chris Mason:
 "I have a two part pull this time because one of the patches Dave
  Sterba collected needed to be against v4.7-rc2 or higher (we used
  rc4).  I try to make my for-linus-xx branch testable on top of the
  last major so we can hand fixes to people on the list more easily, so
  I've split this pull in two.

  This first part has some fixes and two performance improvements that
  we've been testing for some time.

  Josef's two performance fixes are most notable.  The transid tracking
  patch makes a big improvement on pretty much every workload"

* 'for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: Force stripesize to the value of sectorsize
  btrfs: fix disk_i_size update bug when fallocate() fails
  Btrfs: fix error handling in map_private_extent_buffer
  Btrfs: fix error return code in btrfs_init_test_fs()
  Btrfs: don't do nocow check unless we have to
  btrfs: fix deadlock in delayed_ref_async_start
  Btrfs: track transid for delayed ref flushing

8 years agoMerge tag 'sound-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Sat, 25 Jun 2016 13:55:48 +0000 (06:55 -0700)]
Merge tag 'sound-4.7-rc5' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Again pretty calm weeks: we've had only a few trivial / stable
  HD-audio fixes in addition to a possible race fix for snd-dummy driver
  spotted by syzkaller"

* tag 'sound-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: dummy: Fix a use-after-free at closing
  ALSA: hda / realtek - add two more Thinkpad IDs (5050,5053) for tpt460 fixup
  ALSA: hda - Fix the headset mic jack detection on Dell machine
  ALSA: hda/tegra: iomem fixups for sparse warnings
  ALSA: hdac_regmap - fix the register access for runtime PM

8 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 25 Jun 2016 13:49:32 +0000 (06:49 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 kprobe fix from Thomas Gleixner:
 "A single fix clearing the TF bit when a fault is single stepped"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  kprobes/x86: Clear TF bit in fault on single-stepping

8 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 25 Jun 2016 13:38:42 +0000 (06:38 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixes from Thomas Gleixner:
 "A couple of scheduler fixes:

   - force watchdog reset while processing sysrq-w

   - fix a deadlock when enabling trace events in the scheduler

   - fixes to the throttled next buddy logic

   - fixes for the average accounting (missing serialization and
     underflow handling)

   - allow kernel threads for fallback to online but not active cpus"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/core: Allow kthreads to fall back to online && !active cpus
  sched/fair: Do not announce throttled next buddy in dequeue_task_fair()
  sched/fair: Initialize throttle_count for new task-groups lazily
  sched/fair: Fix cfs_rq avg tracking underflow
  kernel/sysrq, watchdog, sched/core: Reset watchdog on all CPUs while processing sysrq-w
  sched/debug: Fix deadlock when enabling sched events
  sched/fair: Fix post_init_entity_util_avg() serialization

8 years agoBtrfs: fix ->iterate_shared() by upgrading i_rwsem for delayed nodes
Omar Sandoval [Fri, 20 May 2016 20:50:33 +0000 (13:50 -0700)]
Btrfs: fix ->iterate_shared() by upgrading i_rwsem for delayed nodes

Commit fe742fd4f90f ("Revert "btrfs: switch to ->iterate_shared()"")
backed out the conversion to ->iterate_shared() for Btrfs because the
delayed inode handling in btrfs_real_readdir() is racy. However, we can
still do readdir in parallel if there are no delayed nodes.

This is a temporary fix which upgrades the shared inode lock to an
exclusive lock only when we have delayed items until we come up with a
more complete solution. While we're here, rename the
btrfs_{get,put}_delayed_items functions to make it very clear that
they're just for readdir.

Tested with xfstests and by doing a parallel kernel build:

while make tinyconfig && make -j4 && git clean dqfx; do
:
done

along with a bunch of parallel finds in another shell:

while true; do
for ((i=0; i<4; i++)); do
find . >/dev/null &
done
wait
done

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
8 years agoMerge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 25 Jun 2016 13:14:44 +0000 (06:14 -0700)]
Merge branch 'locking-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull locking fix from Thomas Gleixner:
 "A single fix to address a race in the static key logic"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/static_key: Fix concurrent static_key_slow_inc()

8 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 25 Jun 2016 13:09:59 +0000 (06:09 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fix from Thomas Gleixner:
 "A single fix for the fallout from the conversion of MIPS GIC to irq
  domains"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/mips-gic: Fix IRQs in gic_dev_domain

8 years agoMerge tag 'powerpc-4.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Sat, 25 Jun 2016 13:01:48 +0000 (06:01 -0700)]
Merge tag 'powerpc-4.7-4' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "mm/radix (Aneesh Kumar K.V):
   - Update to tlb functions ric argument
   - Flush page walk cache when freeing page table
   - Update Radix tree size as per ISA 3.0

  mm/hash (Aneesh Kumar K.V):
   - Use the correct PPP mask when updating HPTE
   - Don't add memory coherence if cache inhibited is set

  eeh (Gavin Shan):
   - Fix invalid cached PE primary bus

  bpf/jit (Naveen N. Rao):
   - Disable classic BPF JIT on ppc64le

  .. and fix faults caused by radix patching of SLB miss handler
  (Michael Ellerman)"

* tag 'powerpc-4.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/bpf/jit: Disable classic BPF JIT on ppc64le
  powerpc: Fix faults caused by radix patching of SLB miss handler
  powerpc/eeh: Fix invalid cached PE primary bus
  powerpc/mm/radix: Update Radix tree size as per ISA 3.0
  powerpc/mm/hash: Don't add memory coherence if cache inhibited is set
  powerpc/mm/hash: Use the correct PPP mask when updating HPTE
  powerpc/mm/radix: Flush page walk cache when freeing page table
  powerpc/mm/radix: Update to tlb functions ric argument

8 years agoFix build break in fork.c when THREAD_SIZE < PAGE_SIZE
Michael Ellerman [Sat, 25 Jun 2016 11:53:30 +0000 (21:53 +1000)]
Fix build break in fork.c when THREAD_SIZE < PAGE_SIZE

Commit b235beea9e99 ("Clarify naming of thread info/stack allocators")
breaks the build on some powerpc configs, where THREAD_SIZE < PAGE_SIZE:

  kernel/fork.c:235:2: error: implicit declaration of function 'free_thread_stack'
  kernel/fork.c:355:8: error: assignment from incompatible pointer type
    stack = alloc_thread_stack_node(tsk, node);
    ^

Fix it by renaming free_stack() to free_thread_stack(), and updating the
return type of alloc_thread_stack_node().

Fixes: b235beea9e99 ("Clarify naming of thread info/stack allocators")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sat, 25 Jun 2016 02:08:33 +0000 (19:08 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "Two weeks worth of fixes here"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (41 commits)
  init/main.c: fix initcall_blacklisted on ia64, ppc64 and parisc64
  autofs: don't get stuck in a loop if vfs_write() returns an error
  mm/page_owner: avoid null pointer dereference
  tools/vm/slabinfo: fix spelling mistake: "Ocurrences" -> "Occurrences"
  fs/nilfs2: fix potential underflow in call to crc32_le
  oom, suspend: fix oom_reaper vs. oom_killer_disable race
  ocfs2: disable BUG assertions in reading blocks
  mm, compaction: abort free scanner if split fails
  mm: prevent KASAN false positives in kmemleak
  mm/hugetlb: clear compound_mapcount when freeing gigantic pages
  mm/swap.c: flush lru pvecs on compound page arrival
  memcg: css_alloc should return an ERR_PTR value on error
  memcg: mem_cgroup_migrate() may be called with irq disabled
  hugetlb: fix nr_pmds accounting with shared page tables
  Revert "mm: disable fault around on emulated access bit architecture"
  Revert "mm: make faultaround produce old ptes"
  mailmap: add Boris Brezillon's email
  mailmap: add Antoine Tenart's email
  mm, sl[au]b: add __GFP_ATOMIC to the GFP reclaim mask
  mm: mempool: kasan: don't poot mempool objects in quarantine
  ...

8 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Linus Torvalds [Sat, 25 Jun 2016 01:52:31 +0000 (18:52 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma

Pull rdma fixes from Doug Ledford:
 "This is the second batch of queued up rdma patches for this rc cycle.

  There isn't anything really major in here.  It's passed 0day,
  linux-next, and local testing across a wide variety of hardware.
  There are still a few known issues to be tracked down, but this should
  amount to the vast majority of the rdma RC fixes.

  Round two of 4.7 rc fixes:

   - A couple minor fixes to the rdma core
   - Multiple minor fixes to hfi1
   - Multiple minor fixes to mlx4/mlx4
   - A few minor fixes to i40iw"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (31 commits)
  IB/srpt: Reduce QP buffer size
  i40iw: Enable level-1 PBL for fast memory registration
  i40iw: Return correct max_fast_reg_page_list_len
  i40iw: Correct status check on i40iw_get_pble
  i40iw: Correct CQ arming
  IB/rdmavt: Correct qp_priv_alloc() return value test
  IB/hfi1: Don't zero out qp->s_ack_queue in rvt_reset_qp
  IB/hfi1: Fix deadlock with txreq allocation slow path
  IB/mlx4: Prevent cross page boundary allocation
  IB/mlx4: Fix memory leak if QP creation failed
  IB/mlx4: Verify port number in flow steering create flow
  IB/mlx4: Fix error flow when sending mads under SRIOV
  IB/mlx4: Fix the SQ size of an RC QP
  IB/mlx5: Fix wrong naming of port_rcv_data counter
  IB/mlx5: Fix post send fence logic
  IB/uverbs: Initialize ib_qp_init_attr with zeros
  IB/core: Fix false search of the IB_SA_WELL_KNOWN_GUID
  IB/core: Fix RoCE v1 multicast join logic issue
  IB/core: Fix no default GIDs when netdevice reregisters
  IB/hfi1: Send a pkey change event on driver pkey update
  ...

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Linus Torvalds [Sat, 25 Jun 2016 01:43:58 +0000 (18:43 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jikos/hid

Pull HID fix from Jiri Kosina:
 "hiddev ioctl() validation fix from Scott Bauer"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
  HID: hiddev: validate num_values for HIDIOCGUSAGES, HIDIOCSUSAGES commands

8 years agoMerge tag 'hwmon-for-linus-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 25 Jun 2016 01:36:15 +0000 (18:36 -0700)]
Merge tag 'hwmon-for-linus-v4.7-rc5' of git://git./linux/kernel/git/groeck/linux-staging

Pull hwmon fix from Guenter Roeck:
 "Improve fan type detection for dell-smm to prevent kernel hang"

* tag 'hwmon-for-linus-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (dell-smm) Cache fan_type() calls and change fan detection

8 years agoMerge tag 'acpi-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Sat, 25 Jun 2016 01:29:55 +0000 (18:29 -0700)]
Merge tag 'acpi-4.7-rc5' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI fix from Rafael Wysocki:
 "Stable-candidate fix for a deadlock in ACPICA introduced during the
  4.5 development cycle by a commit attempting to improve the handling
  of AML code that doesn't belong to any namespace objects in a given
  definition block (Lv Zheng)"

* tag 'acpi-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPICA: Namespace: Fix deadlock triggered by MLC support in dynamic table loading

8 years agoMerge tag 'pm-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Sat, 25 Jun 2016 01:03:22 +0000 (18:03 -0700)]
Merge tag 'pm-4.7-rc5' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "Fix for a latent cpufreq driver bug uncovered by a recent ACPICA
  change and several fixes for the devfreq framework, including one fix
  for an issue introduced recently.

  Specifics:

   - Fix a latent initialization issue in the pcc-cpufreq driver
     (incorrect initial value of a structure field) that has been
     uncovered by a recent ACPICA commit (Mike Galbraith).

   - Add a missing notification in an update_devfreq() error code path
     forgotten by a recent devfreq commit (Chanwoo Choi).

   - Fix devfreq device frequency initialization (Lukasz Luba).

   - Fix an incorrect IS_ERR() check in the devfreq framework discovered
     by the Smatch checker (Dan Carpenter).

   - Drop two excessive put_device() calls from the devfreq framework
     (MyungJoo Ham, Cai Zhiyong).

   - Fix a possible memory leak in the devfreq framework and drop an
     unnecessary kfree() invocation from it (MyungJoo Ham)"

* tag 'pm-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is failed
  cpufreq: pcc-cpufreq: Fix doorbell.access_width
  PM / devfreq: fix initialization of current frequency in last status
  PM / devfreq: exynos-nocp: Remove incorrect IS_ERR() check
  PM / devfreq: remove double put_device
  PM / devfreq: fix double call put_device
  PM / devfreq: fix duplicated kfree on devfreq pointer
  PM / devfreq: devm_kzalloc to have dev pointer more precisely

8 years agoMerge tag 'for-linus-4.7b-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 25 Jun 2016 00:57:37 +0000 (17:57 -0700)]
Merge tag 'for-linus-4.7b-rc4-tag' of git://git./linux/kernel/git/xen/tip

Pull xen bug fixes from David Vrabel:

 - fix x86 PV dom0 crash during early boot on some hardware

 - fix two pciback bugs affects certain devices

 - fix potential overflow when clearing page tables in x86 PV

* tag 'for-linus-4.7b-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen-pciback: return proper values during BAR sizing
  x86/xen: avoid m2p lookup when setting early page table entries
  xen/pciback: Fix conf_space read/write overlap check.
  x86/xen: fix upper bound of pmd loop in xen_cleanhighmap()
  xen/balloon: Fix declared-but-not-defined warning

8 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Sat, 25 Jun 2016 00:51:14 +0000 (17:51 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "Here are a few more arm64 fixes, but things do finally appear to be
  slowing down.  The main fix is avoiding hibernation in a previously
  unanticipated situation where we have CPUs parked in the kernel, but
  it's all good stuff.

   - Fix icache/dcache sync for anonymous pages under migration
   - Correct the ASID limit check
   - Fix parallel builds of Image and Image.gz
   - Refuse to hibernate when we have CPUs that we can't offline"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: hibernate: Don't hibernate on systems with stuck CPUs
  arm64: smp: Add function to determine if cpus are stuck in the kernel
  arm64: mm: remove page_mapping check in __sync_icache_dcache
  arm64: fix boot image dependencies to not generate invalid images
  arm64: update ASID limit

8 years agoinit/main.c: fix initcall_blacklisted on ia64, ppc64 and parisc64
Rasmus Villemoes [Fri, 24 Jun 2016 21:50:30 +0000 (14:50 -0700)]
init/main.c: fix initcall_blacklisted on ia64, ppc64 and parisc64

When I replaced kasprintf("%pf") with a direct call to
sprint_symbol_no_offset I must have broken the initcall blacklisting
feature on the arches where dereference_function_descriptor() is
non-trivial.

Fixes: c8cdd2be213f (init/main.c: simplify initcall_blacklisted())
Link: http://lkml.kernel.org/r/1466027283-4065-1-git-send-email-linux@rasmusvillemoes.dk
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Yang Shi <yang.shi@linaro.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Petr Mladek <pmladek@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoautofs: don't get stuck in a loop if vfs_write() returns an error
Andrey Vagin [Fri, 24 Jun 2016 21:50:27 +0000 (14:50 -0700)]
autofs: don't get stuck in a loop if vfs_write() returns an error

__vfs_write() returns a negative value in a error case.

Link: http://lkml.kernel.org/r/20160616083108.6278.65815.stgit@pluto.themaw.net
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm/page_owner: avoid null pointer dereference
Sudip Mukherjee [Fri, 24 Jun 2016 21:50:24 +0000 (14:50 -0700)]
mm/page_owner: avoid null pointer dereference

We have dereferenced page_ext before checking it.  Lets check it first
and then used it.

Fixes: f86e4271978b ("mm: check the return value of lookup_page_ext for all call sites")
Link: http://lkml.kernel.org/r/1465249059-7883-1-git-send-email-sudipm.mukherjee@gmail.com
Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agotools/vm/slabinfo: fix spelling mistake: "Ocurrences" -> "Occurrences"
Colin Ian King [Fri, 24 Jun 2016 21:50:21 +0000 (14:50 -0700)]
tools/vm/slabinfo: fix spelling mistake: "Ocurrences" -> "Occurrences"

trivial fix to spelling mistake

Link: http://lkml.kernel.org/r/1466672144-831-1-git-send-email-colin.king@canonical.com
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agofs/nilfs2: fix potential underflow in call to crc32_le
Torsten Hilbrich [Fri, 24 Jun 2016 21:50:18 +0000 (14:50 -0700)]
fs/nilfs2: fix potential underflow in call to crc32_le

The value `bytes' comes from the filesystem which is about to be
mounted.  We cannot trust that the value is always in the range we
expect it to be.

Check its value before using it to calculate the length for the crc32_le
call.  It value must be larger (or equal) sumoff + 4.

This fixes a kernel bug when accidentially mounting an image file which
had the nilfs2 magic value 0x3434 at the right offset 0x406 by chance.
The bytes 0x01 0x00 were stored at 0x408 and were interpreted as a
s_bytes value of 1.  This caused an underflow when substracting sumoff +
4 (20) in the call to crc32_le.

  BUG: unable to handle kernel paging request at ffff88021e600000
  IP:  crc32_le+0x36/0x100
  ...
  Call Trace:
    nilfs_valid_sb.part.5+0x52/0x60 [nilfs2]
    nilfs_load_super_block+0x142/0x300 [nilfs2]
    init_nilfs+0x60/0x390 [nilfs2]
    nilfs_mount+0x302/0x520 [nilfs2]
    mount_fs+0x38/0x160
    vfs_kern_mount+0x67/0x110
    do_mount+0x269/0xe00
    SyS_mount+0x9f/0x100
    entry_SYSCALL_64_fastpath+0x16/0x71

Link: http://lkml.kernel.org/r/1466778587-5184-2-git-send-email-konishi.ryusuke@lab.ntt.co.jp
Signed-off-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Tested-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agooom, suspend: fix oom_reaper vs. oom_killer_disable race
Michal Hocko [Fri, 24 Jun 2016 21:50:16 +0000 (14:50 -0700)]
oom, suspend: fix oom_reaper vs. oom_killer_disable race

Tetsuo has reported the following potential oom_killer_disable vs.
oom_reaper race:

 (1) freeze_processes() starts freezing user space threads.
 (2) Somebody (maybe a kenrel thread) calls out_of_memory().
 (3) The OOM killer calls mark_oom_victim() on a user space thread
     P1 which is already in __refrigerator().
 (4) oom_killer_disable() sets oom_killer_disabled = true.
 (5) P1 leaves __refrigerator() and enters do_exit().
 (6) The OOM reaper calls exit_oom_victim(P1) before P1 can call
     exit_oom_victim(P1).
 (7) oom_killer_disable() returns while P1 not yet finished
 (8) P1 perform IO/interfere with the freezer.

This situation is unfortunate.  We cannot move oom_killer_disable after
all the freezable kernel threads are frozen because the oom victim might
depend on some of those kthreads to make a forward progress to exit so
we could deadlock.  It is also far from trivial to teach the oom_reaper
to not call exit_oom_victim() because then we would lose a guarantee of
the OOM killer and oom_killer_disable forward progress because
exit_mm->mmput might block and never call exit_oom_victim.

It seems the easiest way forward is to workaround this race by calling
try_to_freeze_tasks again after oom_killer_disable.  This will make sure
that all the tasks are frozen or it bails out.

Fixes: 449d777d7ad6 ("mm, oom_reaper: clear TIF_MEMDIE for all tasks queued for oom_reaper")
Link: http://lkml.kernel.org/r/1466597634-16199-1-git-send-email-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoocfs2: disable BUG assertions in reading blocks
Gang He [Fri, 24 Jun 2016 21:50:13 +0000 (14:50 -0700)]
ocfs2: disable BUG assertions in reading blocks

According to some high-load testing, these two BUG assertions were
encountered, this led system panic.  Actually, there were some
discussions about removing these two BUG() assertions, it would not
bring any side effect.

Then, I did the the following changes,

1) use the existing macro CATCH_BH_JBD_RACES to wrap BUG() in the
   ocfs2_read_blocks_sync function like before.

2) disable the macro CATCH_BH_JBD_RACES in Makefile by default.

Link: http://lkml.kernel.org/r/1466574294-26863-1-git-send-email-ghe@suse.com
Signed-off-by: Gang He <ghe@suse.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm, compaction: abort free scanner if split fails
David Rientjes [Fri, 24 Jun 2016 21:50:10 +0000 (14:50 -0700)]
mm, compaction: abort free scanner if split fails

If the memory compaction free scanner cannot successfully split a free
page (only possible due to per-zone low watermark), terminate the free
scanner rather than continuing to scan memory needlessly.  If the
watermark is insufficient for a free page of order <= cc->order, then
terminate the scanner since all future splits will also likely fail.

This prevents the compaction freeing scanner from scanning all memory on
very large zones (very noticeable for zones > 128GB, for instance) when
all splits will likely fail while holding zone->lock.

compaction_alloc() iterating a 128GB zone has been benchmarked to take
over 400ms on some systems whereas any free page isolated and ready to
be split ends up failing in split_free_page() because of the low
watermark check and thus the iteration continues.

The next time compaction occurs, the freeing scanner will likely start
at the end of the zone again since no success was made previously and we
get the same lengthy iteration until the zone is brought above the low
watermark.  All thp page faults can take >400ms in such a state without
this fix.

Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1606211820350.97086@chino.kir.corp.google.com
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: prevent KASAN false positives in kmemleak
Dmitry Vyukov [Fri, 24 Jun 2016 21:50:07 +0000 (14:50 -0700)]
mm: prevent KASAN false positives in kmemleak

When kmemleak dumps contents of leaked objects it reads whole objects
regardless of user-requested size.  This upsets KASAN.  Disable KASAN
checks around object dump.

Link: http://lkml.kernel.org/r/1466617631-68387-1-git-send-email-dvyukov@google.com
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm/hugetlb: clear compound_mapcount when freeing gigantic pages
Gerald Schaefer [Fri, 24 Jun 2016 21:50:04 +0000 (14:50 -0700)]
mm/hugetlb: clear compound_mapcount when freeing gigantic pages

While working on s390 support for gigantic hugepages I ran into the
following "Bad page state" warning when freeing gigantic pages:

  BUG: Bad page state in process bash  pfn:580001
  page:000003d116000040 count:0 mapcount:0 mapping:ffffffff00000000 index:0x0
  flags: 0x7fffc0000000000()
  page dumped because: non-NULL mapping

This is because page->compound_mapcount, which is part of a union with
page->mapping, is initialized with -1 in prep_compound_gigantic_page(),
and not cleared again during destroy_compound_gigantic_page().  Fix this
by clearing the compound_mapcount in destroy_compound_gigantic_page()
before clearing compound_head.

Interestingly enough, the warning will not show up on x86_64, although
this should not be architecture specific.  Apparently there is an
endianness issue, combined with the fact that the union contains both a
64 bit ->mapping pointer and a 32 bit atomic_t ->compound_mapcount as
members.  The resulting bogus page->mapping on x86_64 therefore contains
00000000ffffffff instead of ffffffff00000000 on s390, which will falsely
trigger the PageAnon() check in free_pages_prepare() because
page->mapping & PAGE_MAPPING_ANON is true on little-endian architectures
like x86_64 in this case (the page is not compound anymore,
->compound_head was already cleared before).  As a result, page->mapping
will be cleared before doing the checks in free_pages_check().

Not sure if the bogus "PageAnon() returning true" on x86_64 for the
first tail page of a gigantic page (at this stage) has other theoretical
implications, but they would also be fixed with this patch.

Link: http://lkml.kernel.org/r/1466612719-5642-1-git-send-email-gerald.schaefer@de.ibm.com
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm/swap.c: flush lru pvecs on compound page arrival
Lukasz Odzioba [Fri, 24 Jun 2016 21:50:01 +0000 (14:50 -0700)]
mm/swap.c: flush lru pvecs on compound page arrival

Currently we can have compound pages held on per cpu pagevecs, which
leads to a lot of memory unavailable for reclaim when needed.  In the
systems with hundreads of processors it can be GBs of memory.

On of the way of reproducing the problem is to not call munmap
explicitly on all mapped regions (i.e.  after receiving SIGTERM).  After
that some pages (with THP enabled also huge pages) may end up on
lru_add_pvec, example below.

  void main() {
  #pragma omp parallel
  {
size_t size = 55 * 1000 * 1000; // smaller than  MEM/CPUS
void *p = mmap(NULL, size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS , -1, 0);
if (p != MAP_FAILED)
memset(p, 0, size);
//munmap(p, size); // uncomment to make the problem go away
  }
  }

When we run it with THP enabled it will leave significant amount of
memory on lru_add_pvec.  This memory will be not reclaimed if we hit
OOM, so when we run above program in a loop:

for i in `seq 100`; do ./a.out; done

many processes (95% in my case) will be killed by OOM.

The primary point of the LRU add cache is to save the zone lru_lock
contention with a hope that more pages will belong to the same zone and
so their addition can be batched.  The huge page is already a form of
batched addition (it will add 512 worth of memory in one go) so skipping
the batching seems like a safer option when compared to a potential
excess in the caching which can be quite large and much harder to fix
because lru_add_drain_all is way to expensive and it is not really clear
what would be a good moment to call it.

Similarly we can reproduce the problem on lru_deactivate_pvec by adding:
madvise(p, size, MADV_FREE); after memset.

This patch flushes lru pvecs on compound page arrival making the problem
less severe - after applying it kill rate of above example drops to 0%,
due to reducing maximum amount of memory held on pvec from 28MB (with
THP) to 56kB per CPU.

Suggested-by: Michal Hocko <mhocko@suse.com>
Link: http://lkml.kernel.org/r/1466180198-18854-1-git-send-email-lukasz.odzioba@intel.com
Signed-off-by: Lukasz Odzioba <lukasz.odzioba@intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Cc: Ming Li <mingli199x@qq.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomemcg: css_alloc should return an ERR_PTR value on error
Tejun Heo [Fri, 24 Jun 2016 21:49:58 +0000 (14:49 -0700)]
memcg: css_alloc should return an ERR_PTR value on error

mem_cgroup_css_alloc() was returning NULL on failure while cgroup core
expected it to return an ERR_PTR value leading to the following NULL
deref after a css allocation failure.  Fix it by return
ERR_PTR(-ENOMEM) instead.  I'll also update cgroup core so that it
can handle NULL returns.

  mkdir: page allocation failure: order:6, mode:0x240c0c0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO)
  CPU: 0 PID: 8738 Comm: mkdir Not tainted 4.7.0-rc3+ #123
  ...
  Call Trace:
    dump_stack+0x68/0xa1
    warn_alloc_failed+0xd6/0x130
    __alloc_pages_nodemask+0x4c6/0xf20
    alloc_pages_current+0x66/0xe0
    alloc_kmem_pages+0x14/0x80
    kmalloc_order_trace+0x2a/0x1a0
    __kmalloc+0x291/0x310
    memcg_update_all_caches+0x6c/0x130
    mem_cgroup_css_alloc+0x590/0x610
    cgroup_apply_control_enable+0x18b/0x370
    cgroup_mkdir+0x1de/0x2e0
    kernfs_iop_mkdir+0x55/0x80
    vfs_mkdir+0xb9/0x150
    SyS_mkdir+0x66/0xd0
    do_syscall_64+0x53/0x120
    entry_SYSCALL64_slow_path+0x25/0x25
  ...
  BUG: unable to handle kernel NULL pointer dereference at 00000000000000d0
  IP:  init_and_link_css+0x37/0x220
  PGD 34b1e067 PUD 3a109067 PMD 0
  Oops: 0002 [#1] SMP
  Modules linked in:
  CPU: 0 PID: 8738 Comm: mkdir Not tainted 4.7.0-rc3+ #123
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.2-20160422_131301-anatol 04/01/2014
  task: ffff88007cbc5200 ti: ffff8800666d4000 task.ti: ffff8800666d4000
  RIP: 0010:[<ffffffff810f2ca7>]  [<ffffffff810f2ca7>] init_and_link_css+0x37/0x220
  RSP: 0018:ffff8800666d7d90  EFLAGS: 00010246
  RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
  RDX: ffffffff810f2499 RSI: 0000000000000000 RDI: 0000000000000008
  RBP: ffff8800666d7db8 R08: 0000000000000003 R09: 0000000000000000
  R10: 0000000000000001 R11: 0000000000000000 R12: ffff88005a5fb400
  R13: ffffffff81f0f8a0 R14: ffff88005a5fb400 R15: 0000000000000010
  FS:  00007fc944689700(0000) GS:ffff88007fc00000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 00007f3aed0d2b80 CR3: 000000003a1e8000 CR4: 00000000000006f0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  Call Trace:
    cgroup_apply_control_enable+0x1ac/0x370
    cgroup_mkdir+0x1de/0x2e0
    kernfs_iop_mkdir+0x55/0x80
    vfs_mkdir+0xb9/0x150
    SyS_mkdir+0x66/0xd0
    do_syscall_64+0x53/0x120
    entry_SYSCALL64_slow_path+0x25/0x25
  Code: 89 f5 48 89 fb 49 89 d4 48 83 ec 08 8b 05 72 3b d8 00 85 c0 0f 85 60 01 00 00 4c 89 e7 e8 72 f7 ff ff 48 8d 7b 08 48 89 d9 31 c0 <48> c7 83 d0 00 00 00 00 00 00 00 48 83 e7 f8 48 29 f9 81 c1 d8
  RIP   init_and_link_css+0x37/0x220
   RSP <ffff8800666d7d90>
  CR2: 00000000000000d0
  ---[ end trace a2d8836ae1e852d1 ]---

Link: http://lkml.kernel.org/r/20160621165740.GJ3262@mtj.duckdns.org
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomemcg: mem_cgroup_migrate() may be called with irq disabled
Tejun Heo [Fri, 24 Jun 2016 21:49:54 +0000 (14:49 -0700)]
memcg: mem_cgroup_migrate() may be called with irq disabled

mem_cgroup_migrate() uses local_irq_disable/enable() but can be called
with irq disabled from migrate_page_copy().  This ends up enabling irq
while holding a irq context lock triggering the following lockdep
warning.  Fix it by using irq_save/restore instead.

  =================================
  [ INFO: inconsistent lock state ]
  4.7.0-rc1+ #52 Tainted: G        W
  ---------------------------------
  inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
  kcompactd0/151 [HC0[0]:SC0[0]:HE1:SE1] takes:
   (&(&ctx->completion_lock)->rlock){+.?.-.}, at: [<000000000038fd96>] aio_migratepage+0x156/0x1e8
  {IN-SOFTIRQ-W} state was registered at:
     __lock_acquire+0x5b6/0x1930
     lock_acquire+0xee/0x270
     _raw_spin_lock_irqsave+0x66/0xb0
     aio_complete+0x98/0x328
     dio_complete+0xe4/0x1e0
     blk_update_request+0xd4/0x450
     scsi_end_request+0x48/0x1c8
     scsi_io_completion+0x272/0x698
     blk_done_softirq+0xca/0xe8
     __do_softirq+0xc8/0x518
     irq_exit+0xee/0x110
     do_IRQ+0x6a/0x88
     io_int_handler+0x11a/0x25c
     __mutex_unlock_slowpath+0x144/0x1d8
     __mutex_unlock_slowpath+0x140/0x1d8
     kernfs_iop_permission+0x64/0x80
     __inode_permission+0x9e/0xf0
     link_path_walk+0x6e/0x510
     path_lookupat+0xc4/0x1a8
     filename_lookup+0x9c/0x160
     user_path_at_empty+0x5c/0x70
     SyS_readlinkat+0x68/0x140
     system_call+0xd6/0x270
  irq event stamp: 971410
  hardirqs last  enabled at (971409):  migrate_page_move_mapping+0x3ea/0x588
  hardirqs last disabled at (971410):  _raw_spin_lock_irqsave+0x3c/0xb0
  softirqs last  enabled at (970526):  __do_softirq+0x460/0x518
  softirqs last disabled at (970519):  irq_exit+0xee/0x110

  other info that might help us debug this:
   Possible unsafe locking scenario:

 CPU0
 ----
    lock(&(&ctx->completion_lock)->rlock);
    <Interrupt>
      lock(&(&ctx->completion_lock)->rlock);

    *** DEADLOCK ***

  3 locks held by kcompactd0/151:
   #0:  (&(&mapping->private_lock)->rlock){+.+.-.}, at:  aio_migratepage+0x42/0x1e8
   #1:  (&ctx->ring_lock){+.+.+.}, at:  aio_migratepage+0x5a/0x1e8
   #2:  (&(&ctx->completion_lock)->rlock){+.?.-.}, at:  aio_migratepage+0x156/0x1e8

  stack backtrace:
  CPU: 20 PID: 151 Comm: kcompactd0 Tainted: G        W       4.7.0-rc1+ #52
  Call Trace:
    show_trace+0xea/0xf0
    show_stack+0x72/0xf0
    dump_stack+0x9a/0xd8
    print_usage_bug.part.27+0x2d4/0x2e8
    mark_lock+0x17e/0x758
    mark_held_locks+0xa2/0xd0
    trace_hardirqs_on_caller+0x140/0x1c0
    mem_cgroup_migrate+0x266/0x370
    aio_migratepage+0x16a/0x1e8
    move_to_new_page+0xb0/0x260
    migrate_pages+0x8f4/0x9f0
    compact_zone+0x4dc/0xdc8
    kcompactd_do_work+0x1aa/0x358
    kcompactd+0xba/0x2c8
    kthread+0x10a/0x110
    kernel_thread_starter+0x6/0xc
    kernel_thread_starter+0x0/0xc
  INFO: lockdep is turned off.

Link: http://lkml.kernel.org/r/20160620184158.GO3262@mtj.duckdns.org
Link: http://lkml.kernel.org/g/5767CFE5.7080904@de.ibm.com
Fixes: 74485cf2bc85 ("mm: migrate: consolidate mem_cgroup_migrate() calls")
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: <stable@vger.kernel.org> [4.5+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agohugetlb: fix nr_pmds accounting with shared page tables
Kirill A. Shutemov [Fri, 24 Jun 2016 21:49:51 +0000 (14:49 -0700)]
hugetlb: fix nr_pmds accounting with shared page tables

We account HugeTLB's shared page table to all processes who share it.
The accounting happens during huge_pmd_share().

If somebody populates pud entry under us, we should decrease pagetable's
refcount and decrease nr_pmds of the process.

By mistake, I increase nr_pmds again in this case.  :-/ It will lead to
"BUG: non-zero nr_pmds on freeing mm: 2" on process' exit.

Let's fix this by increasing nr_pmds only when we're sure that the page
table will be used.

Link: http://lkml.kernel.org/r/20160617122506.GC6534@node.shutemov.name
Fixes: dc6c9a35b66b ("mm: account pmd page tables to the process")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: zhongjiang <zhongjiang@huawei.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoRevert "mm: disable fault around on emulated access bit architecture"
Kirill A. Shutemov [Fri, 24 Jun 2016 21:49:48 +0000 (14:49 -0700)]
Revert "mm: disable fault around on emulated access bit architecture"

This reverts commit d0834a6c2c5b0c76cfb806bd7dba6556d8b4edbb.

After revert of 5c0a85fad949 ("mm: make faultaround produce old ptes")
faultaround doesn't have dependencies on hardware accessed bit, so let's
revert this one too.

Link: http://lkml.kernel.org/r/1465893750-44080-3-git-send-email-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Vinayak Menon <vinmenon@codeaurora.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoRevert "mm: make faultaround produce old ptes"
Kirill A. Shutemov [Fri, 24 Jun 2016 21:49:45 +0000 (14:49 -0700)]
Revert "mm: make faultaround produce old ptes"

This reverts commit 5c0a85fad949212b3e059692deecdeed74ae7ec7.

The commit causes ~6% regression in unixbench.

Let's revert it for now and consider other solution for reclaim problem
later.

Link: http://lkml.kernel.org/r/1465893750-44080-2-git-send-email-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Vinayak Menon <vinmenon@codeaurora.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>