[PATCH 00/35] Add HMM-based SVM memory manager to KFD

[Jerome Glisse]

On Wed, Jan 06, 2021 at 10:00:52PM -0500, Felix Kuehling wrote:
> This is the first version of our HMM based shared virtual memory manager
> for KFD. There are still a number of known issues that we're working through
> (see below). This will likely lead to some pretty significant changes in
> MMU notifier handling and locking on the migration code paths. So don't
> get hung up on those details yet.

[...]

> Known issues:
> * won't work with IOMMU enabled, we need to dma_map all pages properly
> * still working on some race conditions and random bugs
> * performance is not great yet

What would those changes looks like ? Seeing the issue below i do not
see how they inter-play with mmu notifier. Can you elaborate.

Cheers,
Jérôme