[openib-general] RFC: SDP plans

[Christoph Hellwig]

On Mon, Feb 27, 2006 at 07:34:59PM +0200, Michael S. Tsirkin wrote:
> I started preparing a stable linux SDP implementation,
> with the eye towards mainline inclusion.
> 
> The idea is to get to a drastically simple code base and get this admitted in
> mainline, then add enhancements.
> 
> The plan (as compared to existing SDP implementation) includes:
> - Use CMA API
> - Reuse generic code from sock.c
>   SO_SNDBUF/SO_RCVBUF should work properly
> - Use sock_lock_t and simple spin_lock_bh for socket locking
> - Use skbuff and standard skbuff queues (in struct sock)
>   for incoming/outgoing messages
> - Implement transport-level queues by simple circular buffer,
>   attach BSDH by s/g
> - Set socket bits to signal the need for control messages
> - Single CQ, perform all CQ polling from interrupt context
> - Code must be sparse-clean, keep network data in __beXX structures
> - Proper use of DMA API
> - Use sysfs for statistics, entry per socket

this one sounds a bit fishy.  with lots of sockets you'll eat up far
too much memory I susect.  But let's look at the code once it's there.

else this list sounds like where sdp needs to head for.