On 25.02.24 08:56, Vivek Kasireddy wrote:
Currently, some drivers (e.g, Udmabuf) that want to longterm-pin
the pages/folios associated with a memfd, do so by simply taking a
reference on them. This is not desirable because the pages/folios
may reside in Movable zone or CMA block.
Therefore, having drivers use memfd_pin_folios() API ensures that
the folios are appropriately pinned via FOLL_PIN for longterm DMA.
This patchset also introduces a few helpers and converts the Udmabuf
driver to use folios and memfd_pin_folios() API to longterm-pin
the folios for DMA. Two new Udmabuf selftests are also included to
test the driver and the new API.
---
Sorry Vivek, I got distracted. What's the state of this? I assume it's
not in an mm tree yet.
I try to get this reviewed this week. If I fail to do that, please ping me.
--
Cheers,
David / dhildenb
