Re: HMM (heterogeneous memory management) v6

[Christoph Lameter]

On Mon, 10 Nov 2014, j.glisse@xxxxxxxxx wrote:

> In a nutshell HMM is a subsystem that provide an easy to use api to mirror a
> process address on a device with minimal hardware requirement (mainly device
> page fault and read only page mapping). This does not rely on ATS and PASID
> PCIE extensions. It intends to supersede those extensions by allowing to move
> system memory to device memory in a transparent fashion for core kernel mm
> code (ie cpu page fault on page residing in device memory will trigger
> migration back to system memory).

Could we define a new NUMA node that maps memory from the GPU and
then simply use the existing NUMA features to move a process over there.
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