Arnaldo 


* Supporting legacy protcols
 - reduce maintance costs
 - remove old code
 - better core structures
 - get better practices out of TCP into core
 - code reuse

* Already done
 - struct sock trimming
 - use list.h in networking code
 - factorization of tcp code

* sock trimming
 - generic kernels too much per socket... 
   2.4  (1280) 2.6 tcp=1004 udp=484 unix=356
 - reduce footpring for all protocols
 - per protocol slab cache
 - performance improvements
 - data dependency problem with tcp_tw_bucket

* use list.h in net code
 - use hlist 
 - introduce sk_add_node, sk_del_node for refcounting
 - sk_for_each
 
* factorization
 - move code to net/core/stream
 - general wait_for_memory, wait_for_connnect
 - timer_handling: sk_init_timer,... refcounting
 - apply tcp_memory pressure semantics to all protocols

* waiting in futrure -- sk_common_sendmsg
 - more methods to sk_prot
 - llc can use it

* Next steps
 - kill struct proto_ops?
 - Get the mini sockets in a class hier with other socket classes
 (sock, inet_sock, tcp_sock, ...)
 - network async i/o done/simplified