Eric Dumazet 29e75252da [IPV4] route cache: Introduce rt_genid for smooth cache invalidation ... Current ip route cache implementation is not suited to large caches. We can consume a lot of CPU when cache must be invalidated, since we currently need to evict all cache entries, and this eviction is sometimes asynchronous. min_delay & max_delay can somewhat control this asynchronism behavior, but whole thing is a kludge, regularly triggering infamous soft lockup messages. When entries are still in use, this also consumes a lot of ram, filling dst_garbage.list. A better scheme is to use a generation identifier on each entry, so that cache invalidation can be performed by changing the table identifier, without having to scan all entries. No more delayed flushing, no more stalling when secret_interval expires. Invalidated entries will then be freed at GC time (controled by ip_rt_gc_timeout or stress), or when an invalidated entry is found in a chain when an insert is done. Thus we keep a normal equilibrium. This patch : - renames rt_hash_rnd to rt_genid (and makes it an atomic_t) - Adds a new rt_genid field to 'struct rtable' (filling a hole on 64bit) - Checks entry->rt_genid at appropriate places :		2008-01-31 19:28:27 -08:00
..
9p	Use helpers to obtain task pid in printks	2007-10-19 11:53:43 -07:00
bluetooth	[NET]: Remove FASTCALL macro	2008-01-28 14:57:23 -08:00
irda	[IrDA]: Irport removal - part 1	2008-01-28 15:08:10 -08:00
iucv	[AF_IUCV]: postpone receival of iucv-packets	2007-10-10 16:54:51 -07:00
netfilter	[NETFILTER]: nf_conntrack: annotate l3protos with const	2008-01-31 19:28:13 -08:00
netns	[NETFILTER]: arp_tables: per-netns arp_tables FILTER	2008-01-31 19:27:41 -08:00
sctp	[NET] CORE: Introducing new memory accounting interface.	2008-01-28 15:00:18 -08:00
tc_act	[PKT_SCHED]: Add stateless NAT	2007-10-10 16:53:11 -07:00
tipc
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	[IPV4]: Enable use of 240/4 address space.	2008-01-28 15:08:44 -08:00
af_rxrpc.h
af_unix.h	[AF_UNIX]: Remove unused declaration of sysctl_unix_max_dgram_qlen.	2008-01-28 14:57:13 -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	[NET] include/net/: Spelling fixes	2007-12-20 13:56:32 -08:00
ax88796.h	ax88796: add 93cx6 eeprom support	2007-10-10 16:53:56 -07:00
cfg80211.h	cfg80211/nl80211: implement station attribute retrieval	2008-01-28 14:59:52 -08:00
checksum.h	[NET]: Move netfilter checksum helpers to net/core/utils.c	2008-01-28 14:55:14 -08:00
cipso_ipv4.h
compat.h
datalink.h
dn.h
dn_dev.h
dn_fib.h
dn_neigh.h
dn_nsp.h
dn_route.h	[NET]: Wrap netdevice hardware header creation.	2007-10-10 16:52:50 -07:00
dsfield.h	[NET]: Constify include/net/dsfield.h	2008-01-28 14:55:58 -08:00
dst.h	[DST]: shrinks sizeof(struct rtable) by 64 bytes on x86_64	2008-01-28 15:10:41 -08:00
esp.h	[IPSEC]: Use crypto_aead and authenc in ESP	2008-01-31 19:27:02 -08:00
fib_rules.h	[NETNS]: Process FIB rule action in the context of the namespace.	2008-01-28 15:08:14 -08:00
flow.h	[IPV4]: Remove unused multipath cached routing defintion in net/flow.h	2008-01-28 15:00:20 -08:00
gen_stats.h	[NET_SCHED]: Convert packet schedulers from rtnetlink to new netlink API	2008-01-28 15:11:10 -08:00
genetlink.h
icmp.h	[IPV4]: Add ICMPMsgStats MIB (RFC 4293)	2007-10-10 16:51:28 -07:00
ieee80211.h	ieee80211: fix misannotations	2008-01-28 15:08:48 -08:00
ieee80211_crypt.h
ieee80211_radiotap.h	[MAC80211]: Add get_unaligned to ieee80211_get_radiotap_len	2007-10-10 16:47:40 -07:00
ieee80211softmac.h	[IEEE80211]: Fix softmac lockdep reports.	2007-10-10 16:52:22 -07:00
ieee80211softmac_wx.h
if_inet6.h	IPoIB: improve IPv4/IPv6 to IB mcast mapping functions	2008-01-25 14:15:37 -08:00
inet6_connection_sock.h
inet6_hashtables.h	[NETNS]: Tcp-v6 sockets per-net lookup.	2008-01-31 19:28:20 -08:00
inet_common.h	[INET]: Remove leftover prototypes from include/net/inet_common.h	2007-11-12 21:02:51 -08:00
inet_connection_sock.h
inet_ecn.h	[INET]: Give outer DSCP directly to ip*_copy_dscp	2008-01-28 14:53:45 -08:00
inet_frag.h	[NETNS][FRAGS]: Make the pernet subsystem for fragments.	2008-01-28 15:10:40 -08:00
inet_hashtables.h	[NETNS]: Tcp-v4 sockets per-net lookup.	2008-01-31 19:28:19 -08:00
inet_sock.h	[UDP]: Make use of inet_iif() when doing socket lookups.	2007-10-25 18:54:46 -07:00
inet_timewait_sock.h	[INET]: Uninline the inet_twsk_put function.	2008-01-28 14:59:28 -08:00
inetpeer.h	[INET]: Use list_head-s in inetpeer.c	2007-11-12 21:27:28 -08:00
ip.h	[NETNS][FRAGS]: Make the mem counter per-namespace.	2008-01-28 15:10:36 -08:00
ip6_checksum.h
ip6_fib.h	[XFRM] IPv6: Fix dst/routing check at transformation.	2008-01-28 14:59:36 -08:00
ip6_route.h	[NETNS][IPV6]: Make sysctls route per namespace.	2008-01-28 15:01:20 -08:00
ip6_tunnel.h	[NET] include/net/: Spelling fixes	2007-12-20 13:56:32 -08:00
ip_fib.h	[NETNS]: Add netns parameter to fib_select_default.	2008-01-28 15:11:03 -08:00
ip_vs.h	[IPVS]: Switch to using ctl_paths.	2008-01-28 15:01:08 -08:00
ipcomp.h	[IPSEC]: Get rid of ipv6_{auth,esp,comp}_hdr	2007-10-10 16:55:55 -07:00
ipconfig.h
ipip.h	[IPV4]: Add ip_local_out	2008-01-28 14:53:47 -08:00
ipv6.h	[NETNS][FRAGS]: Make the mem counter per-namespace.	2008-01-28 15:10:36 -08:00
ipx.h
iw_handler.h	[NL80211]: add netlink interface to cfg80211	2007-10-10 16:52:14 -07:00
lapb.h
llc.h
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_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
mac80211.h	mac80211: add unified BSS configuration	2008-01-28 15:09:43 -08:00
mip6.h
ndisc.h	[IPv6]: Export userland ND options through netlink (RDNSS support)	2007-10-10 21:22:05 -07:00
neighbour.h	[ARP]: neigh_parms_put(destroy) are essentially local to core/neighbour.c.	2008-01-28 15:02:11 -08:00
net_namespace.h	[NETFILTER]: x_tables: per-netns xt_tables	2008-01-31 19:27:35 -08:00
netdma.h
netevent.h	[NET]: Remove unnecessary inclusion of dst.h	2008-01-28 14:53:38 -08:00
netlabel.h	NetLabel: Introduce static network labels for unlabeled connections	2008-01-30 08:17:28 +11:00
netlink.h	[NETLINK]: Add nla_append()	2008-01-28 15:11:09 -08:00
netrom.h
nexthop.h
p8022.h
pkt_cls.h	[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API	2008-01-28 15:11:11 -08:00
pkt_sched.h	[NET_SCHED]: Convert packet schedulers from rtnetlink to new netlink API	2008-01-28 15:11:10 -08:00
protocol.h	[IPV6]: make inet6_register_protosw to return an error code	2008-01-28 14:57:12 -08:00
psnap.h
raw.h	[RAW]: Wrong content of the /proc/net/raw6.	2008-01-31 19:27:26 -08:00
rawv6.h	[IPv6] RAW: Compact the API for the kernel	2008-01-28 14:54:29 -08:00
red.h
request_sock.h	[INET]: Fix potential kfree on vmalloc-ed area of request_sock_queue	2007-11-15 02:57:06 -08:00
rose.h	[ROSE]: Fix rose.ko oops on unload	2007-10-07 23:44:17 -07:00
route.h	[IPV4] route cache: Introduce rt_genid for smooth cache invalidation	2008-01-31 19:28:27 -08:00
rtnetlink.h	[NET]: Make the device list and device lookups per namespace.	2007-10-10 16:49:10 -07:00
sch_generic.h	[NET_SCHED]: Convert classifiers from rtnetlink to new netlink API	2008-01-28 15:11:11 -08:00
scm.h	pid namespaces: changes to show virtual ids to user	2007-10-19 11:53:40 -07:00
slhc_vj.h
snmp.h	[XFRM]: Define packet dropping statistics.	2008-01-28 14:59:38 -08:00
sock.h	[NET]: Introducing socket mark socket option.	2008-01-31 19:27:19 -08:00
syncppp.h
tcp.h	[TCP]: Uninline tcp_is_cwnd_limited	2008-01-28 15:01:48 -08:00
tcp_states.h
timewait_sock.h
transp_v6.h	[IPV6]: make the protocol initialization to return an error code	2008-01-28 14:57:13 -08:00
udp.h	[NET]: prot_inuse cleanups and optimizations	2008-01-28 15:00:36 -08:00
udplite.h	[UDP]: Restore missing inDatagrams increments	2008-01-28 14:56:33 -08:00
wext.h	[NET]: Make the device list and device lookups per namespace.	2007-10-10 16:49:10 -07:00
wireless.h
x25.h
x25device.h
xfrm.h	[XFRM]: constify 'struct xfrm_type'	2008-01-31 19:27:20 -08:00