On 6/11/24 07:34, Christoph Hellwig wrote:

On Fri, Jun 07, 2024 at 02:45:55PM +0100, Pavel Begunkov wrote:

quoted

On 6/5/24 09:24, Christoph Hellwig wrote:

quoted

On Mon, Jun 03, 2024 at 03:52:32PM +0100, Pavel Begunkov wrote:

quoted

The question for Christoph is what exactly is the objection here? Why we
would not be using well defined ops when we know there will be more
users?

The point is that there should be no more users.  If you need another

Does that "No more" stops after devmem tcp?

There should be no other memory source other than the page allocator
and dmabuf.  If you need different life time control for your
zero copy proposal don't mix that up with the contol of the memory
source.

No idea how I'm mixing it up when I was explaining exactly this
all along as well as that the callback (and presumably the call
site in general) you was so eager to nack is used exactly to
implement the life time control.

-- 
Pavel Begunkov