This is the second patchset with IPVS optimizations. Now we convert the schedulers, dests and services to RCU. All patches are for net-next based on the first patchset v3. The idea is after discussion and review Simon to apply the patchset after a week or so to ipvs-next tree. The changes in this patchset eliminate global locks from packet processing by using RCU. There are more details in the patches. After this patchset the situation is as follows: - dests: - lookups under RCU lock allow ip_vs_dest_hold, used for binding dest to conn or to select dest by scheduler - dests are freed by dest_trash code long after grace period - services: - no global read_lock - lookups under RCU lock allow scheduler to select dests under RCU lock - grace period implemented with IP_VS_WAIT_WHILE is gone allowing scheduler's dest selection and scheduler reconfiguration to run in parallel - schedulers: - schedule method runs under RCU lock, needs _rcu if using svc->destinations, needs _bh suffix to locks because it can be called in LOCAL_OUT hook - when dest is added, the add_dest method is called instead of update_service - when dest is deleted, the del_dest method is called instead of update_service - when dest is updated, the upd_dest method is called instead of update_service - scheduler can hold dests in its state long after they are unlinked from svc, even without providing del_dest handler. But such dests must not be returned by the schedule method (needs IP_VS_DEST_F_AVAILABLE check) - sched_data must be freed after grace period and module exit should be delayed with synchronize_rcu to wait all RCU read-side critical sections to complete - BH: - we do not disable BHs in LOCAL_OUT and sync code anymore - _bh suffixes are added to all places that need them, except timer handlers Julian Anastasov (19): ipvs: change ip_vs_sched_lock to mutex ipvs: preparations for using rcu in schedulers ipvs: add ip_vs_dest_hold and ip_vs_dest_put ipvs: convert dh scheduler to rcu ipvs: convert lblc scheduler to rcu ipvs: convert lblcr scheduler to rcu ipvs: convert lc scheduler to rcu ipvs: convert nq scheduler to rcu ipvs: convert rr scheduler to rcu ipvs: convert sed scheduler to rcu ipvs: convert sh scheduler to rcu ipvs: convert wlc scheduler to rcu ipvs: convert wrr scheduler to rcu ipvs: reorganize dest trash ipvs: do not expect result from done_service ipvs: convert sched_lock to spin lock ipvs: convert dests to rcu ipvs: convert services to rcu ipvs: do not disable bh for long time include/net/ip_vs.h | 59 +++-- net/netfilter/ipvs/ip_vs_app.c | 4 +- net/netfilter/ipvs/ip_vs_conn.c | 47 ++-- net/netfilter/ipvs/ip_vs_core.c | 57 ++--- net/netfilter/ipvs/ip_vs_ctl.c | 510 ++++++++++++++++----------------- net/netfilter/ipvs/ip_vs_dh.c | 86 +++--- net/netfilter/ipvs/ip_vs_ftp.c | 2 + net/netfilter/ipvs/ip_vs_lblc.c | 115 ++++---- net/netfilter/ipvs/ip_vs_lblcr.c | 190 +++++++------ net/netfilter/ipvs/ip_vs_lc.c | 3 +- net/netfilter/ipvs/ip_vs_nq.c | 3 +- net/netfilter/ipvs/ip_vs_pe.c | 12 - net/netfilter/ipvs/ip_vs_proto_sctp.c | 18 +- net/netfilter/ipvs/ip_vs_proto_tcp.c | 22 +- net/netfilter/ipvs/ip_vs_proto_udp.c | 14 +- net/netfilter/ipvs/ip_vs_rr.c | 64 +++-- net/netfilter/ipvs/ip_vs_sched.c | 63 ++--- net/netfilter/ipvs/ip_vs_sed.c | 5 +- net/netfilter/ipvs/ip_vs_sh.c | 86 +++--- net/netfilter/ipvs/ip_vs_sync.c | 35 +-- net/netfilter/ipvs/ip_vs_wlc.c | 5 +- net/netfilter/ipvs/ip_vs_wrr.c | 176 +++++++----- net/netfilter/ipvs/ip_vs_xmit.c | 16 +- 23 files changed, 819 insertions(+), 773 deletions(-) -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe lvs-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
