On Mon, Jan 12, 2026 at 10:14:40AM -0400, Jason Gunthorpe wrote:
On Mon, Jan 12, 2026 at 01:57:25PM +0100, Christian König wrote:
Clear NAK to that plan. This is not something DMA-buf should need to deal with and as far as I can see is incompatible with the UAPI.
We had this discussion with Simona and you a while back and there was a pretty clear direction we needed to add a revoke to sit inbetween pin and move. I think Leon has no quite got the "dmabuf lingo" down right to explain this.
https://lore.kernel.org/dri-devel/Z4Z4NKqVG2Vbv98Q@phenom.ffwll.local/
<...>
It is not intended to be UAPI changing, and Leon is not trying to say that importers have to drop their attachment. The attachment just becomes permanently non-present.
Leon also ensures that no UAPI semantic changes are introduced here; the existing interface is simply extended.
Thanks
Jason