On Fri, Mar 22, 2013 at 11:46:35AM +0200, Julian Anastasov wrote: > 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 Hi Julian, what is the status of this series? N.B: THis series is different to "[PATCH 00/15 v3] IPVS optimizations (repost)" -- 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
