MTRR cleanup support (and other new kernel options) - do we want them?

[interzoneuk]

Hi.

I have noticed the following new kernel options that may effect nvidia driver

Does anyone know if we want to use these options .


MTRR cleanup support
MTRR cleanup enable value (0-7)
MTRR cleanup spare reg num (0-7)
Support for DMA Remapping Devices
Support for Graphics workaround

The reason I ask is due to the fact that another recent kernel addition pat had previously caused extreme lag.

Any help/advice would be cool

Cheers

[interzoneuk]

Does anyone know what settings are useful for nvidia users ?

PAT seems fixed in 180.22 +

[interzoneuk]

Also do we want

Preemption Model (Preemptible Kernel (Low-Latency Desktop)) or voluntary preemption for best nvidia result?

Also

CONFIG_PREEMPT_RCU ?

Also ideas would be welcomed

Regards

[Dizzle7677]

Straight 'Desktop' not LLD.
as far as MTRR I have this CONFIG_MTRR=y
but after that
# CONFIG_MTRR_SANITIZER is not set
# CONFIG_X86_PAT is not set
# CONFIG_EFI is not set
another nice option is to set the tick rate at 1000Hz.
CONFIG_HZ_1000=y
CONFIG_HZ=1000

as far as RCU...

CONFIG_CLASSIC_RCU=y

You shouldn't need DMA Remapping but test it out. :)

CFQ for IO Schedueler.