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
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
act_api.h
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_unix.h	net: unix: fix inflight counting bug in garbage collector	2008-11-09 11:17:33 -08:00
ah.h
arp.h
atmclip.h
ax25.h
ax88796.h
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
datalink.h
dcbnl.h	DCB: Add support for DCB BCN	2008-11-20 21:10:23 -08:00
dn.h
dn_dev.h
dn_fib.h
dn_neigh.h
dn_nsp.h
dn_route.h
dsa.h	dsa: add support for Trailer tagging format	2008-10-08 17:24:16 -07:00
dsfield.h
dst.h	net: make sure struct dst_entry refcount is aligned on 64 bytes	2008-11-16 19:46:36 -08:00
esp.h
fib_rules.h
flow.h	ipv4: Loosen source address check on IPv4 output	2008-10-01 07:28:28 -07:00
garp.h
gen_stats.h
genetlink.h
icmp.h
ieee80211.h	lib80211: absorb crypto bits from net/ieee80211	2008-11-21 11:08:17 -05:00
ieee80211_radiotap.h	include: use get/put_unaligned_* helpers	2008-07-25 10:53:26 -07:00
if_inet6.h
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
inet_connection_sock.h	net: more #ifdef CONFIG_COMPAT	2008-08-28 02:53:51 -07:00
inet_ecn.h
inet_frag.h
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
ip.h	net: avoid a pair of dst_hold()/dst_release() in ip_append_data()	2008-11-24 15:52:46 -08:00
ip6_checksum.h
ip6_fib.h
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
ip_fib.h
ip_vs.h	include/net net/ - csum_partial - remove unnecessary casts	2008-11-19 15:44:53 -08:00
ipcomp.h
ipconfig.h
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
iw_handler.h
lapb.h
lib80211.h	wireless: missing include in lib80211.h	2008-11-21 11:42:55 -05:00
llc.h
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
mac80211.h	mac80211: add explicit padding in struct ieee80211_tx_info	2008-11-21 11:08:18 -05:00
mip6.h
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
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
psnap.h
raw.h
rawv6.h
red.h
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
route.h	ipv4: Conditionally enable transparent flow flag when connecting	2008-10-01 07:35:39 -07:00
rtnetlink.h
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
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
tcp.h	tcp: remove an unnecessary field in struct tcp_skb_cb	2008-11-13 22:44:11 -08:00
tcp_states.h
timewait_sock.h
transp_v6.h
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
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
xfrm.h	xfrm: remove unused struct xfrm_policy::next	2008-10-31 00:42:25 -07:00