This series is aimed at improving the act_mirred redirect performances. Such action is used by OVS to represent TC S/W flows, and it's current largest bottle-neck is the need for a skb_clone() for each packet.
The first 2 patches introduce some cleanup and safeguards to allow changing the TC_ACT_REDIRECT handling: currently the action context is stored in per CPU variables, and we allow also to use the tcf_result. Finally we use this extended infrastructure in act_mirred to implement redirect via TC_ACT_REDIRECT, when possible. Overall this the above gives a ~10% performance improvement in forwarding tput, when using the TC S/W datapath. Paolo Abeni (4): tc/act: user space can't use TC_ACT_REDIRECT directly tc/act: remove unneeded RCU lock in action callback net/sched: refactor TC_ACT_REDIRECT handling act_mirred: use ACT_REDIRECT when possible include/net/act_api.h | 2 +- include/net/sch_generic.h | 17 ++++++++++++++++- include/uapi/linux/pkt_cls.h | 1 + net/core/dev.c | 4 ++-- net/core/filter.c | 29 +++++++++++++++++++++++------ net/core/lwt_bpf.c | 5 ++++- net/sched/act_api.c | 5 +++++ net/sched/act_bpf.c | 8 ++++---- net/sched/act_csum.c | 12 +++--------- net/sched/act_ife.c | 5 +---- net/sched/act_mirred.c | 19 ++++++++++++++----- net/sched/act_sample.c | 4 +--- net/sched/act_skbedit.c | 10 +++------- net/sched/act_skbmod.c | 21 +++++++++------------ net/sched/act_tunnel_key.c | 6 +----- net/sched/act_vlan.c | 19 +++++++------------ net/sched/cls_bpf.c | 8 +++++--- 17 files changed, 100 insertions(+), 75 deletions(-) -- 2.17.1
