This series extends ICW usage to one of the few remaining spots in fast-path
still hitting per packet retpoline overhead, namely the sk_proto->{send,recv}msg
calls.
The first 3 patches in this series refactor the existing code so that applying
the ICW macros is straight-forward: we demux inet_{recv,send}msg in ipv4 and
ipv6 variants so that each of them can easily select the appropriate TCP or UDP
direct call. While at it, a new helper is created to avoid excessive code
duplication, and the current ICWs for inet_{recv,send}msg are adjusted
accordingly.
The last 2 patches really introduce the new ICW use-case, respectively for the
ipv6 and the ipv4 code path.
This gives up to 5% performance improvement under UDP flood, and smaller but
measurable gains for TCP RR workloads.
v1 -> v2:
- drop inet6_{recv,send}msg declaration from header file,
prefer ICW macro instead
- avoid unneeded reclaration for udp_sendmsg, as suggested by Willem
Paolo Abeni (5):
inet: factor out inet_send_prepare()
ipv6: provide and use ipv6 specific version for {recv,send}msg
net: adjust socket level ICW to cope with ipv6 variant of
{recv,send}msg
ipv6: use indirect call wrappers for {tcp,udpv6}_{recv,send}msg()
ipv4: use indirect call wrappers for {tcp,udp}_{recv,send}msg()
include/net/inet_common.h | 1 +
net/ipv4/af_inet.c | 31 ++++++++++++++++++-----------
net/ipv6/af_inet6.c | 41 +++++++++++++++++++++++++++++++++++----
net/socket.c | 23 +++++++++++-----------
4 files changed, 69 insertions(+), 27 deletions(-)
--
2.20.1
