Dave, SMC-capability is to be negotiated with a TCP experimental option. As requested during code review of our previous approach using netfilter hooks, here's a new version. It touches tcp-code in the first patch and exploits the new tcp flag in the smc-code. Kind regards, Ursula Changelog: V3: * move include for linux/unaligned/access_ok.h to tcp_input.c V2: * switch to current jump labels API * remove static key checking in smc_set_capability() (comment from Eric Dumazet) * use inet_request_sock parameter for smc_set_option_cond() * smc_listen_work(): replace local variable lgr_lock_taken by new labels and separate this change into a prerequisite first patch Ursula Braun (3): smc: fix mutex unlocks during link group creation tcp: TCP experimental option for SMC smc: add SMC rendezvous protocol include/linux/tcp.h | 9 +++++-- include/net/inet_sock.h | 3 ++- include/net/tcp.h | 7 ++++++ net/ipv4/tcp.c | 6 +++++ net/ipv4/tcp_input.c | 35 +++++++++++++++++++++++++++ net/ipv4/tcp_minisocks.c | 19 +++++++++++++++ net/ipv4/tcp_output.c | 63 +++++++++++++++++++++++++++++++++++++++++++++--- net/smc/af_smc.c | 42 +++++++++++++++++++++++--------- 8 files changed, 167 insertions(+), 17 deletions(-) -- 2.13.5 -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html