Michal Kubeček ba310bc86f ipv6: prevent fib6_run_gc() contention ... commit 2ac3ac8f86f2fe065d746d9a9abaca867adec577 upstream. On a high-traffic router with many processors and many IPv6 dst entries, soft lockup in fib6_run_gc() can occur when number of entries reaches gc_thresh. This happens because fib6_run_gc() uses fib6_gc_lock to allow only one thread to run the garbage collector but ip6_dst_gc() doesn't update net->ipv6.ip6_rt_last_gc until fib6_run_gc() returns. On a system with many entries, this can take some time so that in the meantime, other threads pass the tests in ip6_dst_gc() (ip6_rt_last_gc is still not updated) and wait for the lock. They then have to run the garbage collector one after another which blocks them for quite long. Resolve this by replacing special value ~0UL of expire parameter to fib6_run_gc() by explicit "force" parameter to choose between spin_lock_bh() and spin_trylock_bh() and call fib6_run_gc() with force=false if gc_thresh is reached but not max_size. Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net> Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-07-03 19:48:09 -07:00
..
9p	9p: turn fid->dlist into hlist	2013-02-27 22:51:08 -05:00
bluetooth	Bluetooth: Introduce a new HCI_RFKILLED flag	2013-10-13 16:08:32 -07:00
caif	caif: Remove my bouncing email address.	2013-04-23 13:25:51 -04:00
irda	irda: small read past the end of array in debug code	2013-04-19 17:32:31 -04:00
iucv	af_iucv: fix recvmsg by replacing skb_pull() function	2013-04-08 17:16:57 -04:00
netfilter	netfilter: nf_conntrack: reserve two bytes for nf_ct_ext->len	2014-05-30 21:52:11 -07:00
netns	ipv4: tcp: get rid of ugly unicast_sock	2015-02-26 17:48:48 -08:00
nfc	NFC: RFKILL support	2013-04-12 16:54:45 +02:00
phonet	net: remove my future former mail address	2012-06-17 16:29:38 -07:00
sctp	net: sctp: fix skb_over_panic when receiving malformed ASCONF chunks	2014-11-21 09:22:55 -08:00
tc_act
act_api.h	act_police: move struct tcf_police to act_police.c	2013-02-12 18:59:45 -05:00
addrconf.h	IPv6 NAT: Do not drop DNATed 6to4/6rd packets	2013-10-13 16:08:30 -07:00
af_ieee802154.h
af_rxrpc.h
af_unix.h	af_unix: fix a fatal race with bit fields	2013-05-01 15:13:49 -04:00
ah.h
arp.h	net: Dont use ifindices in hash fns	2012-08-09 16:18:06 -07:00
atmclip.h
ax25.h	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00
ax88796.h
cfg80211-wext.h
cfg80211.h	cfg80211: introduce critical protocol indication from user-space	2013-04-22 15:48:00 +02:00
checksum.h	net: core: add function for incremental IPv6 pseudo header checksum updates	2012-08-30 03:00:16 +02:00
cipso_ipv4.h	net: fix cipso packet validation when !NETLABEL	2013-11-04 04:31:04 -08:00
cls_cgroup.h	cls_cgroup: remove task_struct parameter from sock_update_classid()	2013-04-09 13:19:35 -04:00
codel.h	codel: refine one condition to avoid a nul rec_inv_sqrt	2012-08-10 16:52:54 -07:00
compat.h	net: cleanup unsigned to unsigned int	2012-04-15 12:44:40 -04:00
datalink.h
dcbevent.h
dcbnl.h	net/dcb: Add an optional max rate attribute	2012-04-05 05:08:04 -04:00
dn_dev.h
dn_fib.h	decnet: Parse netlink attributes on our own	2013-03-22 10:31:16 -04:00
dn_neigh.h
dn_nsp.h
dn_route.h	decnet: use correct RCU API to deref sk_dst_cache field	2013-01-28 00:15:27 -05:00
dn.h	net: cleanup unsigned to unsigned int	2012-04-15 12:44:40 -04:00
dsa.h
dsfield.h	ipv6: Optimize ipv6_change_dsfield().	2013-01-09 23:59:53 -08:00
dst_ops.h	net: Fix warnings in dst_ops.h	2012-07-19 10:43:03 -07:00
dst.h	net: dst: provide accessor function to dst->xfrm	2013-11-04 04:31:03 -08:00
esp.h
ethoc.h
fib_rules.h	ipv4: Elide fib_validate_source() completely when possible.	2012-06-29 01:36:36 -07:00
firewire.h	firewire net, ipv4 arp: Extend hardware address and remove driver-level packet inspection.	2013-03-26 12:32:13 -04:00
flow_keys.h	flow_keys: include thoff into flow_keys for later usage	2013-03-20 12:14:36 -04:00
flow.h	ipv4: Add FLOWI_FLAG_KNOWN_NH	2012-10-08 17:42:36 -04:00
garp.h
gen_stats.h
genetlink.h	genl: Hold reference on correct module while netlink-dump.	2013-09-14 06:54:55 -07:00
gre.h	GRE: Refactor GRE tunneling code.	2013-03-26 12:27:18 -04:00
gro_cells.h	gro: Fix kcalloc argument order	2013-01-27 22:46:33 -05:00
icmp.h	ipv4: fix error handling in icmp_protocol.	2013-02-22 15:10:18 -05:00
ieee80211_radiotap.h	mac80211: support (partial) VHT radiotap information	2012-11-27 11:56:18 +01:00
ieee802154_netdev.h	ieee802154/nl-mac.c: make some MLME operations optional	2013-04-08 12:00:16 -04:00
ieee802154.h
if_inet6.h	net: ipv6: only invalidate previously tokenized addresses	2013-04-09 13:12:23 -04:00
inet6_connection_sock.h	ipv6: Add helper inet6_csk_update_pmtu().	2012-07-16 03:44:56 -07:00
inet6_hashtables.h	ipv6: use a stronger hash for tcp	2013-02-21 18:15:58 -05:00
inet_common.h	net-tcp: Fast Open client - sendmsg(MSG_FASTOPEN)	2012-07-19 11:02:03 -07:00
inet_connection_sock.h	tcp: fix tcp_release_cb() to dispatch via address family for mtu_reduced()	2014-10-15 08:31:56 +02:00
inet_ecn.h	tunnel: drop packet if ECN present with not-ECT	2012-09-27 18:12:37 -04:00
inet_frag.h	net: frag, fix race conditions in LRU list maintenance	2013-05-06 11:06:51 -04:00
inet_hashtables.h	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00
inet_sock.h	ipv6: use a stronger hash for tcp	2013-02-21 18:15:58 -05:00
inet_timewait_sock.h	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00
inetpeer.h	inetpeer: get rid of ip_id_count	2014-08-14 09:24:15 +08:00
ip6_checksum.h	ipv6: move csum_ipv6_magic() and udp6_csum_init() into static library	2013-01-08 17:56:10 -08:00
ip6_fib.h	ipv6: prevent fib6_run_gc() contention	2015-07-03 19:48:09 -07:00
ip6_route.h	ipv6: Limit mtu to 65575 bytes	2014-05-30 21:52:14 -07:00
ip6_tunnel.h	GRE: Refactor GRE tunneling code.	2013-03-26 12:27:18 -04:00
ip_fib.h	ipv4: fix definition of FIB_TABLE_HASHSZ	2013-03-13 10:47:09 -04:00
ip_tunnels.h	ip_gre: Fix WCCPv2 header parsing.	2013-11-20 12:27:46 -08:00
ip_vs.h	netfilter: push reasm skb through instead of original frag skbs	2013-12-08 07:29:25 -08:00
ip.h	ipv4: tcp: get rid of ugly unicast_sock	2015-02-26 17:48:48 -08:00
ipcomp.h
ipconfig.h
ipv6.h	inetpeer: get rid of ip_id_count	2014-08-14 09:24:15 +08:00
ipx.h
iw_handler.h
lapb.h	lapb: Neaten debugging	2012-05-17 18:45:20 -04:00
lib80211.h	hostap: Don't use create_proc_read_entry()	2013-04-29 15:41:56 -04:00
llc_c_ac.h
llc_c_ev.h	net: cleanup unsigned to unsigned int	2012-04-15 12:44:40 -04:00
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h	net: delete all instances of special processing for token ring	2012-05-15 20:14:35 -04:00
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
llc.h	llc: Remove stray reference to sysctl_llc_station_ack_timeout.	2012-09-17 13:13:24 -04:00
mac80211.h	mac80211: add a flag to indicate CCK support for HT clients	2013-09-07 22:09:59 -07:00
mac802154.h	mac802154: add wpan device-class support	2012-06-26 21:06:11 -07:00
mip6.h
mld.h
mrp.h	net/802: Implement Multiple Registration Protocol (MRP)	2013-02-10 20:37:22 -05:00
ndisc.h	ndisc: Add missing inline to ndisc_addr_option_pad	2013-08-11 18:35:26 -07:00
neighbour.h	net neighbour, decnet: Ensure to align device private data on preferred alignment.	2013-02-11 00:21:44 -05:00
net_namespace.h	netfilter: make /proc/net/netfilter pernet	2013-04-05 19:35:02 +02:00
net_ratelimit.h
netdma.h
netevent.h	ipv6 netevent: Remove old_neigh from netevent_redirect.	2013-01-14 15:04:59 -05:00
netlabel.h	userns: Convert the audit loginuid to be a kuid	2012-09-17 18:08:54 -07:00
netlink.h	netlink: Rename pid to portid to avoid confusion	2012-09-10 15:30:41 -04:00
netprio_cgroup.h	netprio_cgroup: remove task_struct parameter from sock_update_netprio()	2013-04-09 13:19:37 -04:00
netrom.h	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00
nexthop.h
nl802154.h
p8022.h
ping.h
pkt_cls.h	pkt_sched: namespace aware act_mirred	2013-01-14 15:09:36 -05:00
pkt_sched.h	sch_api: introduce qdisc_watchdog_schedule_ns()	2013-02-12 18:59:45 -05:00
protocol.h	net: Remove code duplication between offload structures	2012-11-15 17:39:51 -05:00
psnap.h
raw.h
rawv6.h	ipv6: bool/const conversions phase2	2012-05-19 01:08:16 -04:00
red.h	net_sched: red: Make minor corrections to comments	2012-04-16 23:53:11 -04:00
regulatory.h	regulatory: use RCU to protect last_request	2013-01-03 13:01:30 +01:00
request_sock.h	net: remove a stale comment for dl_next	2013-04-22 15:55:48 -04:00
rose.h
route.h	ipv4: avoid a test in ip_rt_put()	2012-11-03 14:59:04 -04:00
rtnetlink.h	rtnetlink: Remove passing of attributes into rtnl_doit functions	2013-03-22 10:31:16 -04:00
sch_generic.h	net_sched: restore "linklayer atm" handling	2013-09-14 06:54:55 -07:00
scm.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-04-22 20:32:51 -04:00
secure_seq.h	inetpeer: get rid of ip_id_count	2014-08-14 09:24:15 +08:00
slhc_vj.h
snmp.h	net: avoid reloads in SNMP_UPD_PO_STATS	2012-08-06 13:40:47 -07:00
sock.h	tcp: fix tcp_release_cb() to dispatch via address family for mtu_reduced()	2014-10-15 08:31:56 +02:00
stp.h
tcp_memcontrol.h	cgroup: pass struct mem_cgroup instead of struct cgroup to socket memcg	2012-04-10 10:04:07 -07:00
tcp_states.h
tcp.h	tcp: fix tcp_release_cb() to dispatch via address family for mtu_reduced()	2014-10-15 08:31:56 +02:00
timewait_sock.h	[PATCH] tcp: Cache inetpeer in timewait socket, and only when necessary.	2012-06-09 14:56:12 -07:00
transp_v6.h	ipv6: rename datagram_send_ctl and datagram_recv_ctl	2013-01-31 13:53:08 -05:00
udp.h	ipv6: call udp_push_pending_frames when uncorking a socket with AF_INET pending data	2013-07-28 16:29:49 -07:00
udplite.h	net: ipv4: Standardize prefixes for message logging	2012-03-12 17:05:21 -07:00
wext.h
wimax.h	net: cleanup unsigned to unsigned int	2012-04-15 12:44:40 -04:00
wpan-phy.h	mac802154: monitor device support	2012-05-16 15:17:08 -04:00
x25.h	net: cleanup unsigned to unsigned int	2012-04-15 12:44:40 -04:00
x25device.h
xfrm.h	xfrm: force a garbage collection after deleting a policy	2013-05-31 17:30:07 -07:00