On 24.08.23 08:31, Kasireddy, Vivek wrote:
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?
I guess using proper APIs for shmem and hugetlb. So, turning roughly
what you have in patch#1 for now into common code, and only calling into
that from udmabug.
--
Cheers,
David / dhildenb
