Hello Julian Great work! On Thu, 2013-03-21 at 11:57 +0200, Julian Anastasov wrote: > This is a first patchset for IPVS optimizations. > Another patchset will address the locking in schedulers > and moving the global _bh disabling from LOCAL_OUT to all > locks. > > All patches are for net-next and Simon can > take them for ipvs-next. > > The changes in this patchset eliminate locks > and dst refcnt operations from packet processing by > using RCU. There are more details in the patches. I've gone through all patches and tested them now it looks very promising, all my tests have passed. Signed-off by: Hans Schillstrom <hans@xxxxxxxxxxxxxxx> > v3: > * in "ipvs: consolidate all dst checks on transmit in one place" > preserve original skb dst even for local client, remove the > rt_is_input_route and skb->dev check. Call update_pmtu only for > local client by providing sk instead of skb. > * in "ipvs: optimize dst usage for real server" use > rcu_dereference_protected for __ip_vs_dst_cache_reset instead of > rcu_dereference_raw. Use the new skb_dst_set_noref_force func. > * in "ipvs: remove rs_lock by using RCU" prefer the port check in > ip_vs_has_real_service > * "ipvs: convert locks used in persistence engines" needs only > synchronize_rcu, not rcu_barrier, we do not use rcu callbacks > > v2: > * use "net: add skb_dst_set_unref" instead of > "net: add dst_get_noref and refdst_ptr helpers" > * add "ipvs: no need to reroute anymore on DNAT over loopback" > * add "ipvs: do not use skb_share_check" > * add "ipvs: consolidate all dst checks on transmit in one place", so > that we can avoid the refdst games in next patch > * after "ipvs: consolidate all dst checks on transmit in one place" > "ipvs: optimize dst usage for real server" is simpler and > uses the new skb_dst_set_unref function > * extend "ipvs: reorder keys in connection structure" with > changes in ip_vs_ct_in_get > * fix "ipvs: avoid kmem_cache_zalloc in ip_vs_conn_new" to use new > function ip_vs_addr_set, so that we reset all address fields > that are used for hashing by hash_conntrack_raw > > Julian Anastasov (15): > net: add skb_dst_set_noref_force > ipvs: avoid routing by TOS for real server > ipvs: prefer NETDEV_DOWN event to free cached dsts > ipvs: convert the IP_VS_XMIT macros to functions > ipvs: rename functions related to dst_cache reset > ipvs: no need to reroute anymore on DNAT over loopback > ipvs: do not use skb_share_check > ipvs: consolidate all dst checks on transmit in one place > ipvs: optimize dst usage for real server > ipvs: convert app locks > ipvs: remove rs_lock by using RCU > ipvs: convert locks used in persistence engines > ipvs: convert connection locking > ipvs: reorder keys in connection structure > ipvs: avoid kmem_cache_zalloc in ip_vs_conn_new > > include/linux/skbuff.h | 35 ++- > include/net/ip_vs.h | 71 ++- > net/core/dst.c | 9 +- > net/netfilter/ipvs/ip_vs_app.c | 27 +- > net/netfilter/ipvs/ip_vs_conn.c | 271 +++++---- > net/netfilter/ipvs/ip_vs_core.c | 16 +- > net/netfilter/ipvs/ip_vs_ctl.c | 143 +++--- > net/netfilter/ipvs/ip_vs_ftp.c | 2 + > net/netfilter/ipvs/ip_vs_pe.c | 43 +- > net/netfilter/ipvs/ip_vs_pe_sip.c | 1 + > net/netfilter/ipvs/ip_vs_proto_sctp.c | 18 +- > net/netfilter/ipvs/ip_vs_proto_tcp.c | 18 +- > net/netfilter/ipvs/ip_vs_proto_udp.c | 19 +- > net/netfilter/ipvs/ip_vs_xmit.c | 1046 ++++++++++++++------------------- > 14 files changed, 810 insertions(+), 909 deletions(-) >
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