On 6/7/24 7:42 AM, Pavel Begunkov wrote:

I haven't seen any arguments against from the (net) maintainers so
far. Nor I see any objection against callbacks from them (considering
that either option adds an if).

I have said before I do not understand why the dmabuf paradigm is not
sufficient for both device memory and host memory. A less than ideal
control path to put hostmem in a dmabuf wrapper vs extra checks and
changes in the datapath. The former should always be preferred.

I also do not understand why the ifq cache and overloading xdp functions
have stuck around; I always thought both were added by Jonathan to
simplify kernel ports during early POC days.