Re: Netlink messages without NLM_F_REQUEST flag

On Wed, Jun 07, 2017 at 12:35:11PM -0600, Jason Gunthorpe wrote:

On Wed, Jun 07, 2017 at 09:18:10PM +0300, Leon Romanovsky wrote:

quoted

quoted

AFAIK, that is different, that is acking and retriggering a single shot
notification, not completing a kernel initiated handshake.

It is acking that message from user was received by kernel and now
processing.

But isn't what is cared about here - the SA thing needs to send a
request to user space and collect a reply, it runs the protocol
backwards from normal.

Thanks all, this explain a little bit "RDMA anomaly".
I'm not sure that I saw such scheme in the kernel, does anybody else
in the kernel use such backward scheme or this is RDMA-specific?

Thanks