On Mon, Nov 6, 2023 at 3:55 PM David Ahern dsahern@kernel.org wrote:
On 11/6/23 4:32 PM, Stanislav Fomichev wrote:
The concise notification API returns tokens as a range for compression, encoding as two 32-bit unsigned integers start + length. It allows for even further batching by returning multiple such ranges in a single call.
Tangential: should tokens be u64? Otherwise we can't have more than 4gb unacknowledged. Or that's a reasonable constraint?
Was thinking the same and with bits reserved for a dmabuf id to allow multiple dmabufs in a single rx queue (future extension, but build the capability in now). e.g., something like a 37b offset (128GB dmabuf size), 19b length (large GRO), 8b dmabuf id (lots of dmabufs to a queue).
Agreed. Converting to 64b now sounds like a good forward looking revision.