[PATCH v1 0/3] udmabuf: Add support for page migration out of movable zone or CMA

[Kasireddy, Vivek]

Hi David,

> 
> >> - Add a new API to the backing store/allocator to longterm-pin the page.
> >>    For example, something along the lines of
> shmem_pin_mapping_page_longterm()
> >>    for shmem as suggested by Daniel. A similar one needs to be added for
> >>    hugetlbfs as well.
> >
> > This may also be reasonable.
> 
> Sounds reasonable to keep the old API (that we unfortunately have) working.
I agree; I'd like to avoid adding new APIs unless absolutely necessary. Given this,
and considering the options I have mentioned earlier, what would be your
recommendation for how page migration needs to be done in udmabuf driver?

Thanks,
Vivek

> 
> --
> Cheers,
> 
> David / dhildenb