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2e77d89b2f
linux_dsm_epyc7002/include/net
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Eric Dumazet 2e77d89b2f net: avoid a pair of dst_hold()/dst_release() in ip_append_data() 
We can reduce pressure on dst entry refcount that slowdown UDP transmit
path on SMP machines. This pressure is visible on RTP servers when
delivering content to mediagateways, especially big ones, handling
thousand of streams. Several cpus send UDP frames to the same
destination, hence use the same dst entry.

This patch makes ip_append_data() eventually steal the refcount its
callers had to take on the dst entry.

This doesnt avoid all refcounting, but still gives speedups on SMP,
on UDP/RAW transmit path

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-24 15:52:46 -08:00
..
9p 9p: fix sparse warnings 2008-10-22 18:54:47 -05:00
bluetooth include: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
irda include: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
iucv [AF_IUCV]: postpone receival of iucv-packets 2007-10-10 16:54:51 -07:00
netfilter misc: replace NIPQUAD() 2008-10-31 00:56:49 -07:00
netns net: implement emergency route cache rebulds when gc_elasticity is exceeded 2008-10-27 17:06:14 -07:00
phonet Phonet: include generic link-layer header size in MAX_PHONET_HEADER 2008-10-26 23:06:31 -07:00
sctp misc: replace NIPQUAD() 2008-10-31 00:56:49 -07:00
tc_act pkt_action: add new action skbedit 2008-09-12 16:30:20 -07:00
tipc tipc: Remove unneeded parameter to tipc_createport_raw() 2008-07-14 22:42:19 -07:00
act_api.h [NET_SCHED]: act_api: use PTR_ERR in tcf_action_init/tcf_action_get 2008-01-28 15:11:17 -08:00
addrconf.h netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr() 2008-08-14 15:33:21 -07:00
af_rxrpc.h [AF_RXRPC]: Add an interface to the AF_RXRPC module for the AFS filesystem to use 2007-04-26 15:50:17 -07:00
af_unix.h net: unix: fix inflight counting bug in garbage collector 2008-11-09 11:17:33 -08:00
ah.h [IPSEC]: Get rid of ipv6_{auth,esp,comp}_hdr 2007-10-10 16:55:55 -07:00
arp.h [NETFILTER]: ebtables: remove casts, use consts 2008-01-31 19:27:33 -08:00
atmclip.h
ax25.h [AX25] ax25_ds_timer: use mod_timer instead of add_timer 2008-02-12 17:53:34 -08:00
ax88796.h ax88796: add 93cx6 eeprom support 2007-10-10 16:53:56 -07:00
cfg80211.h cfg80211: make use of reg macros on REG_RULE 2008-11-10 15:17:41 -05:00
checksum.h include/net net/ - csum_partial - remove unnecessary casts 2008-11-19 15:44:53 -08:00
cipso_ipv4.h cipso: Add support for native local labeling and fixup mapping names 2008-10-10 10:16:34 -04:00
compat.h net: Use standard structures for generic socket address structures. 2008-07-19 22:35:47 -07:00
datalink.h
dcbnl.h DCB: Add support for DCB BCN 2008-11-20 21:10:23 -08:00
dn_dev.h
dn_fib.h [DECNet]: Use rtnl registration interface 2007-04-25 22:27:12 -07:00
dn_neigh.h
dn_nsp.h
dn_route.h [NET]: Wrap netdevice hardware header creation. 2007-10-10 16:52:50 -07:00
dn.h [DECNET]: Another unnecessary net/tcp.h inclusion in net/dn.h 2007-07-10 23:02:12 -07:00
dsa.h dsa: add support for Trailer tagging format 2008-10-08 17:24:16 -07:00
dsfield.h [NET]: Constify include/net/dsfield.h 2008-01-28 14:55:58 -08:00
dst.h net: make sure struct dst_entry refcount is aligned on 64 bytes 2008-11-16 19:46:36 -08:00
esp.h [IPSEC]: Use crypto_aead and authenc in ESP 2008-01-31 19:27:02 -08:00
fib_rules.h net: add fib_rules_ops to flush_cache method 2008-07-05 19:01:28 -07:00
flow.h ipv4: Loosen source address check on IPv4 output 2008-10-01 07:28:28 -07:00
garp.h vlan: Add GVRP support 2008-07-05 21:26:57 -07:00
gen_stats.h [NET_SCHED]: Convert packet schedulers from rtnetlink to new netlink API 2008-01-28 15:11:10 -08:00
genetlink.h netlink: Improve returned error codes 2008-06-03 16:36:54 -07:00
icmp.h mib: put icmpmsg statistics on struct net 2008-07-18 04:04:22 -07:00
ieee80211_radiotap.h include: use get/put_unaligned_* helpers 2008-07-25 10:53:26 -07:00
ieee80211.h lib80211: absorb crypto bits from net/ieee80211 2008-11-21 11:08:17 -05:00
if_inet6.h ipv6: make struct ipv6_devconf static 2008-07-22 14:21:58 -07:00
inet6_connection_sock.h
inet6_hashtables.h inet: Don't lookup the socket if there's a socket attached to the skb 2008-10-07 12:41:01 -07:00
inet_common.h [NETNS]: Inet control socket should not hold a namespace. 2008-04-03 14:28:30 -07:00
inet_connection_sock.h net: more #ifdef CONFIG_COMPAT 2008-08-28 02:53:51 -07:00
inet_ecn.h [IPV6]: Use appropriate sock tclass setting for routing lookup. 2008-04-13 23:40:51 -07:00
inet_frag.h [NET]: Rename inet_frag.h identifiers COMPLETE, FIRST_IN, LAST_IN to INET_FRAG_* 2008-03-28 16:35:27 -07:00
inet_hashtables.h net: Convert TCP/DCCP listening hash tables to use RCU 2008-11-23 17:22:55 -08:00
inet_sock.h tcp: Port redirection support for TCP 2008-10-01 07:46:49 -07:00
inet_timewait_sock.h net: Convert TCP & DCCP hash tables to use RCU / hlist_nulls 2008-11-16 19:40:17 -08:00
inetpeer.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ip6_checksum.h
ip6_fib.h [NETNS][IPV6] rt6_info - move rt6_info structure inside the namespace 2008-03-04 13:48:30 -08:00
ip6_route.h netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr() 2008-08-14 15:33:21 -07:00
ip6_tunnel.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ip_fib.h [IPV4]: Fix compile error building without CONFIG_FS_PROC 2008-02-05 02:54:16 -08:00
ip_vs.h include/net net/ - csum_partial - remove unnecessary casts 2008-11-19 15:44:53 -08:00
ip.h net: avoid a pair of dst_hold()/dst_release() in ip_append_data() 2008-11-24 15:52:46 -08:00
ipcomp.h ipsec: ipcomp - Merge IPComp implementations 2008-07-25 02:54:40 -07:00
ipconfig.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ipip.h inet: Make tunnel RX/TX byte counters more consistent 2008-10-09 12:03:17 -07:00
ipv6.h ipv6: making ip and icmp statistics per/namespace 2008-10-08 11:16:45 -07:00
ipx.h [SK_BUFF]: Introduce skb_transport_header(skb) 2007-04-25 22:25:31 -07:00
iw_handler.h wext: Emit event stream entries correctly when compat. 2008-06-16 18:50:49 -07:00
lapb.h
lib80211.h wireless: missing include in lib80211.h 2008-11-21 11:42:55 -05:00
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h [NET]: Make socket creation namespace safe. 2007-10-10 16:49:07 -07:00
llc_if.h [LLC]: Kill static inline llc_addrany 2008-02-29 11:46:17 -08:00
llc_pdu.h [LLC]: skb allocation size for responses 2008-03-31 21:02:47 -07:00
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h [LLC]: skb allocation size for responses 2008-03-31 21:02:47 -07:00
llc.h [LLC]: station source mac address 2008-03-28 16:28:36 -07:00
mac80211.h mac80211: add explicit padding in struct ieee80211_tx_info 2008-11-21 11:08:18 -05:00
mip6.h [IPV6] MIP6: Use our standard definitions for paddings. 2008-04-12 13:43:22 +09:00
ndisc.h bonding: send IPv6 neighbor advertisement on failover 2008-11-06 00:49:37 -05:00
neighbour.h net: Cleanup of neighbour code 2008-11-12 00:54:54 -08:00
net_namespace.h net: Introduce read_pnet() and write_pnet() helpers 2008-11-12 00:53:30 -08:00
netdma.h
netevent.h [NET]: Remove unnecessary inclusion of dst.h 2008-01-28 14:53:38 -08:00
netlabel.h netlabel: Add configuration support for local labeling 2008-10-10 10:16:34 -04:00
netlink.h netlink: constify struct nlattr * arg to parsing functions 2008-10-28 11:59:11 -07:00
netrom.h
nexthop.h
p8022.h
pkt_cls.h ematch: simpler tcf_em_unregister() 2008-11-16 23:01:49 -08:00
pkt_sched.h pkt_sched: Remove the tx queue state check in qdisc_run() 2008-09-23 01:05:56 -07:00
protocol.h [NETNS]: Drop packets in the non-initial namespace on the per/protocol basis. 2008-03-24 15:33:00 -07:00
psnap.h
raw.h [RAW]: Add raw_hashinfo member on struct proto. 2008-03-22 16:56:51 -07:00
rawv6.h [IPv6] RAW: Compact the API for the kernel 2008-01-28 14:54:29 -08:00
red.h [NET_SCHED]: turn PSCHED_GET_TIME into inline function 2007-04-25 22:27:55 -07:00
request_sock.h tcp: Fix kernel panic when calling tcp_v(4/6)_md5_do_lookup 2008-08-06 23:50:04 -07:00
rose.h rose: improving AX25 routing frames via ROSE network 2008-06-17 17:08:32 -07:00
route.h ipv4: Conditionally enable transparent flow flag when connecting 2008-10-01 07:35:39 -07:00
rtnetlink.h [RTNL]: Introduce the rtnl_kill_links helper. 2008-04-16 00:46:52 -07:00
sch_generic.h pkt_sched: Remove qdisc->ops->requeue() etc. 2008-11-13 22:56:30 -08:00
scm.h net: Fix recursive descent in __scm_destroy(). 2008-11-06 13:51:50 -08:00
slhc_vj.h
snmp.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
sock.h Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2008-11-18 23:38:23 -08:00
stp.h net: Add STP demux layer 2008-07-05 21:25:39 -07:00
tcp_states.h
tcp.h tcp: remove an unnecessary field in struct tcp_skb_cb 2008-11-13 22:44:11 -08:00
timewait_sock.h
transp_v6.h net: change proto destroy method to return void 2008-06-14 17:04:49 -07:00
udp.h udp: Use hlist_nulls in UDP RCU code 2008-11-16 19:39:21 -08:00
udplite.h udp: introduce struct udp_table and multiple spinlocks 2008-10-29 01:41:45 -07:00
wext.h wext: Dispatch and handle compat ioctls entirely in net/wireless/wext.c 2008-06-16 18:32:46 -07:00
wireless.h net: struct device - replace bus_id with dev_name(), dev_set_name() 2008-11-10 13:55:14 -08:00
x25.h
x25device.h [SK_BUFF]: Introduce skb_reset_mac_header(skb) 2007-04-25 22:24:32 -07:00
xfrm.h xfrm: remove unused struct xfrm_policy::next 2008-10-31 00:42:25 -07:00