On Fri, Mar 22, 2024 at 10:40:26AM -0700, Mina Almasry wrote:
Hi Christoph,
Sorry for the late reply, I've been out for a few days.
On Mon, Mar 18, 2024 at 4:22 PM Christoph Hellwig hch@infradead.org wrote:
On Sun, Mar 17, 2024 at 07:49:43PM -0700, David Wei wrote:
I'm working on a similar proposal for zero copy Rx but to host memory and depend on this memory provider API.
How do you need a different provider for that vs just udmabuf?
This was discussed on the io_uring ZC RFC in one of the earliest RFCs. Here is a link to Pavel's response:
https://patchwork.kernel.org/project/netdevbpf/patch/20231106024413.2801438-...
Undesirable is not a good argument. We need one proper API that different subsystems share for this use case (this is the same Feedback I gave Keith for the similar block proposal btw, not picking on the net folks here).
If dmabuf/udmabuf doesn't work for that we need to enhance or replace it, but not come up with little subsystem specific side channels.