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6869c4d8e0
linux-next/net/ipv4
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Harald Welte 6869c4d8e0 [NETFILTER]: reduce netfilter sk_buff enlargement 
As discussed at netconf'05, we're trying to save every bit in sk_buff.
The patch below makes sk_buff 8 bytes smaller.  I did some basic
testing on my notebook and it seems to work.

The only real in-tree user of nfcache was IPVS, who only needs a
single bit.  Unfortunately I couldn't find some other free bit in
sk_buff to stuff that bit into, so I introduced a separate field for
them.  Maybe the IPVS guys can resolve that to further save space.

Initially I wanted to shrink pkt_type to three bits (PACKET_HOST and
alike are only 6 values defined), but unfortunately the bluetooth code
overloads pkt_type :(

The conntrack-event-api (out-of-tree) uses nfcache, but Rusty just
came up with a way how to do it without any skb fields, so it's safe
to remove it.

- remove all never-implemented 'nfcache' code
- don't have ipvs code abuse 'nfcache' field. currently get's their own
  compile-conditional skb->ipvs_property field.  IPVS maintainers can
  decide to move this bit elswhere, but nfcache needs to die.
- remove skb->nfcache field to save 4 bytes
- move skb->nfctinfo into three unused bits to save further 4 bytes

Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-29 15:31:04 -07:00
..
ipvs [NETFILTER]: reduce netfilter sk_buff enlargement 2005-08-29 15:31:04 -07:00
netfilter [NETFILTER]: reduce netfilter sk_buff enlargement 2005-08-29 15:31:04 -07:00
af_inet.c [IPV4]: Fix up lots of little whitespace indentation stuff in fib_trie. 2005-07-19 14:01:51 -07:00
ah4.c [IPSEC]: Add xfrm_init_state 2005-06-20 13:18:08 -07:00
arp.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
datagram.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
devinet.c [PATCH] create a kstrdup library function 2005-06-23 09:45:18 -07:00
esp4.c [IPSEC]: Add xfrm_init_state 2005-06-20 13:18:08 -07:00
fib_frontend.c [NETLINK]: fib_lookup() via netlink 2005-06-20 13:36:39 -07:00
fib_hash.c [NETLINK]: Correctly set NLM_F_MULTI without checking the pid 2005-06-18 22:54:12 -07:00
fib_lookup.h [NETLINK]: Correctly set NLM_F_MULTI without checking the pid 2005-06-18 22:54:12 -07:00
fib_rules.c [NETLINK]: Correctly set NLM_F_MULTI without checking the pid 2005-06-18 22:54:12 -07:00
fib_semantics.c [IPV4]: Fix memory leak during fib_info hash expansion. 2005-08-05 04:12:48 -07:00
fib_trie.c [FIB_TRIE]: Don't ignore negative results from fib_semantic_match 2005-08-23 22:06:09 -07:00
icmp.c [IPV4]: Fix DST leak in icmp_push_reply() 2005-08-18 14:05:44 -07:00
igmp.c [IPV4]: fix IPv4 leave-group group matching 2005-07-08 17:48:38 -07:00
inetpeer.c [IPV4]: Fix negative timer loop with lots of ipv4 peers. 2005-08-23 10:10:15 -07:00
ip_forward.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ip_fragment.c [IPV4]: Debug cleanup 2005-08-08 14:26:52 -07:00
ip_gre.c [NET]: fix oops after tunnel module unload 2005-07-30 17:46:44 -07:00
ip_input.c [IPV4]: Snmpv2 Mib IP counter ipInAddrErrors support 2005-06-28 13:06:23 -07:00
ip_options.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ip_output.c [NETFILTER]: reduce netfilter sk_buff enlargement 2005-08-29 15:31:04 -07:00
ip_sockglue.c [IPSEC]: Restrict socket policy loading to CAP_NET_ADMIN. 2005-08-06 06:33:15 -07:00
ipcomp.c [IPCOMP]: Fix false smp_processor_id warning 2005-08-18 14:36:59 -07:00
ipconfig.c [IPV4]: ipconfig.c: fix dhcp timeout behaviour 2005-06-28 13:21:12 -07:00
ipip.c [NET]: fix oops after tunnel module unload 2005-07-30 17:46:44 -07:00
ipmr.c [NET]: Spelling mistakes threshoulds -> thresholds 2005-07-30 17:41:59 -07:00
Kconfig [IPV4]: Fix Kconfig syntax error 2005-07-27 13:00:04 -07:00
Makefile [NET]: Move in_aton from net/ipv4/utils.c to net/core/utils.c 2005-07-27 15:24:42 -07:00
multipath_drr.c [IPV4]: Multipath modules need a license to prevent kernel tainting. 2005-06-13 14:29:06 -07:00
multipath_random.c [IPV4]: Multipath modules need a license to prevent kernel tainting. 2005-06-13 14:29:06 -07:00
multipath_rr.c [IPV4]: Multipath modules need a license to prevent kernel tainting. 2005-06-13 14:29:06 -07:00
multipath_wrandom.c [IPV4]: Multipath modules need a license to prevent kernel tainting. 2005-06-13 14:29:06 -07:00
multipath.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
proc.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
protocol.c [PATCH] update Ross Biro bouncing email address 2005-05-05 16:36:49 -07:00
raw.c [IPV4]: [4/4] signed vs unsigned cleanup in net/ipv4/raw.c 2005-06-18 23:00:34 -07:00
route.c [IPV4]: Prevent oops when printing martian source 2005-07-11 21:01:42 -07:00
syncookies.c [NET] Rename open_request to request_sock 2005-06-18 22:47:21 -07:00
sysctl_net_ipv4.c [TCP]: Add pluggable congestion control algorithm infrastructure. 2005-06-23 12:19:55 -07:00
tcp_bic.c [TCP]: Add TCP BIC congestion control module. 2005-06-23 12:23:25 -07:00
tcp_cong.c [TCP]: Allow choosing TCP congestion control via sockopt. 2005-06-23 20:37:36 -07:00
tcp_diag.c [TCP]: Report congestion control algorithm in tcp_diag. 2005-06-23 12:21:28 -07:00
tcp_highspeed.c [TCP]: Add High Speed TCP congestion control module. 2005-06-23 12:24:58 -07:00
tcp_htcp.c [TCP]: Add H-TCP congestion control module. 2005-06-23 12:28:11 -07:00
tcp_hybla.c [TCP]: Add TCP Hybla congestion control module. 2005-06-23 12:26:34 -07:00
tcp_input.c [NET]: Transform skb_queue_len() binary tests into skb_queue_empty() 2005-07-08 14:57:23 -07:00
tcp_ipv4.c [TCP]: Document non-trivial locking path in tcp_v{4,6}_get_port(). 2005-08-23 10:49:54 -07:00
tcp_minisocks.c [TCP]: Add pluggable congestion control algorithm infrastructure. 2005-06-23 12:19:55 -07:00
tcp_output.c [TCP]: Do TSO deferral even if tail SKB can go out now. 2005-08-23 10:09:27 -07:00
tcp_scalable.c [TCP]: Add Scalable TCP congestion control module. 2005-06-23 12:29:07 -07:00
tcp_timer.c [NET]: Transform skb_queue_len() binary tests into skb_queue_empty() 2005-07-08 14:57:23 -07:00
tcp_vegas.c [TCP]: Add TCP Vegas congestion control module. 2005-06-23 12:27:19 -07:00
tcp_westwood.c [TCP]: Add TCP Westwood congestion control module. 2005-06-23 12:24:09 -07:00
tcp.c [TCP]: Unconditionally clear TCP_NAGLE_PUSH in skb_entail(). 2005-08-23 10:13:06 -07:00
udp.c [IPV4]: Debug cleanup 2005-08-08 14:26:52 -07:00
xfrm4_input.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
xfrm4_output.c [IPSEC]: Add XFRM_STATE_NOPMTUDISC flag 2005-06-20 13:21:43 -07:00
xfrm4_policy.c [IPSEC]: Store idev entries 2005-05-03 16:27:10 -07:00
xfrm4_state.c [IPSEC]: Add XFRM_STATE_NOPMTUDISC flag 2005-06-20 13:21:43 -07:00
xfrm4_tunnel.c [NET]: Make ipip/ip6_tunnel independant of XFRM 2005-07-19 14:03:34 -07:00