linux/include/net
Eric Dumazet e88a276614 gro_cells: mark napi struct as not busy poll candidates
Rolf Neugebauer reported very long delays at netns dismantle.

Eric W. Biederman was kind enough to look at this problem
and noticed synchronize_net() occurring from netif_napi_del() that was
added in linux-4.5

Busy polling makes no sense for tunnels NAPI.
If busy poll is used for sessions over tunnels, the poller will need to
poll the physical device queue anyway.

netif_tx_napi_add() could be used here, but function name is misleading,
and renaming it is not stable material, so set NAPI_STATE_NO_BUSY_POLL
bit directly.

This will avoid inserting gro_cells napi structures in napi_hash[]
and avoid the problematic synchronize_net() (per possible cpu) that
Rolf reported.

Fixes: 93d05d4a32 ("net: provide generic busy polling to all NAPI drivers")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
Reported-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-15 22:27:27 -05:00
..
9p
bluetooth Bluetooth: Add support for appearance in scan rsp 2016-09-19 20:19:34 +02:00
caif
irda
iucv
netfilter netfilter: conntrack: avoid excess memory allocation 2016-10-27 18:29:02 +02:00
netns Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-09-25 23:34:19 +02:00
nfc NFC: digital: Add support for NFC DEP Response Waiting Time 2016-07-11 02:01:14 +02:00
phonet
sctp sctp: hold transport instead of assoc when lookup assoc in rx path 2016-10-31 16:20:33 -04:00
tc_act net_sched: act_vlan: add helper inlines to access tcf_vlan info 2016-09-23 07:22:11 -04:00
6lowpan.h
act_api.h net_sched: convert tcf_exts from list to pointer array 2016-08-17 19:27:51 -04:00
addrconf.h ipv6: fix a potential deadlock in do_ipv6_setsockopt() 2016-10-21 11:29:02 -04:00
af_ieee802154.h
af_rxrpc.h rxrpc: Rewrite the data and ack handling code 2016-09-08 11:10:12 +01:00
af_unix.h af_unix: split 'u->readlock' into two: 'iolock' and 'bindlock' 2016-09-04 13:29:29 -07:00
af_vsock.h VSOCK: Introduce virtio_vsock_common.ko 2016-08-02 02:57:29 +03:00
ah.h
arp.h
atmclip.h
ax25.h
ax88796.h
bond_3ad.h
bond_alb.h
bond_options.h
bonding.h bonding: quit messing with IOCTL 2016-09-27 21:15:21 -04:00
busy_poll.h
calipso.h
cfg80211-wext.h
cfg80211.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-29 20:33:20 -07:00
cfg802154.h ieee802154: add netns support 2016-07-08 12:20:57 +02:00
checksum.h
cipso_ipv4.h
cls_cgroup.h
codel_impl.h
codel_qdisc.h
codel.h
compat.h
datalink.h
dcbevent.h
dcbnl.h
devlink.h devlink: remove unused priv_size 2016-08-26 11:55:18 -07:00
dn_dev.h
dn_fib.h
dn_neigh.h
dn_nsp.h
dn_route.h
dn.h
dsa.h net: dsa: add port fast ageing 2016-09-23 08:38:50 -04:00
dsfield.h
dst_cache.h
dst_metadata.h net/dst: Utility functions to build dst_metadata without supplying an skb 2016-09-10 20:53:55 -07:00
dst_ops.h
dst.h
esp.h
ethoc.h
fib_rules.h
firewire.h
flow_dissector.h rps: flow_dissector: Add the const for the parameter of flow_keys_have_l4 2016-09-01 16:51:08 -07:00
flow.h net: flow: Remove FLOWI_FLAG_L3MDEV_SRC flag 2016-09-10 23:12:53 -07:00
flowcache.h
fou.h
fq_impl.h fq.h: Port memory limit mechanism from fq_codel 2016-09-30 13:29:21 +02:00
fq.h fq.h: Port memory limit mechanism from fq_codel 2016-09-30 13:29:21 +02:00
garp.h
gen_stats.h
genetlink.h
geneve.h
gre.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-08-18 01:17:32 -04:00
gro_cells.h gro_cells: mark napi struct as not busy poll candidates 2016-11-15 22:27:27 -05:00
gtp.h gtp: #define #define _GTP_H_ and not #define _GTP_H 2016-07-25 17:55:43 -07:00
gue.h
hwbm.h
icmp.h
ieee80211_radiotap.h mac80211: add support for radiotap timestamp field 2016-09-12 11:45:45 +02:00
ieee802154_netdev.h
if_inet6.h IPv6: fix DESYNC_FACTOR 2016-10-14 10:59:15 -04:00
ila.h
inet6_connection_sock.h
inet6_hashtables.h
inet_common.h
inet_connection_sock.h tcp: increase ICSK_CA_PRIV_SIZE from 64 bytes to 88 2016-09-21 00:23:01 -04:00
inet_ecn.h ipv6: suppress sparse warnings in IP6_ECN_set_ce() 2016-08-13 15:08:00 -07:00
inet_frag.h
inet_hashtables.h
inet_sock.h
inet_timewait_sock.h
inetpeer.h
ip6_checksum.h
ip6_fib.h net: ipv6: Fix processing of RAs in presence of VRF 2016-10-27 16:30:52 -04:00
ip6_route.h net: ipv6: Do not consider link state for nexthop validation 2016-10-27 16:33:12 -04:00
ip6_tunnel.h ip6_tunnel: Clear IP6CB in ip6tunnel_xmit() 2016-11-02 15:18:36 -04:00
ip_fib.h switchdev: remove FIB offload infrastructure 2016-09-28 04:48:00 -04:00
ip_tunnels.h ip_tunnel: add collect_md mode to IPIP tunnel 2016-09-17 10:13:07 -04:00
ip_vs.h
ip.h ipv4: allow local fragmentation in ip_finish_output_gso() 2016-11-03 16:10:26 -04:00
ipcomp.h
ipconfig.h
ipv6.h Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/selinux into next 2016-07-07 10:15:34 +10:00
ipx.h
iw_handler.h
kcm.h kcm: Use stream parser 2016-08-17 19:36:23 -04:00
l3mdev.h net: ipv4: Do not drop to make_route if oif is l3mdev 2016-10-13 12:05:26 -04:00
lapb.h
lib80211.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
llc.h
lwtunnel.h net: lwtunnel: Handle fragmentation 2016-08-30 22:27:18 -07:00
mac80211.h mac80211: fix some sphinx warnings 2016-10-26 08:01:07 +02:00
mac802154.h ieee802154: cleanup WARN_ON for fc fetch 2016-07-08 13:23:12 +02:00
mip6.h
mld.h
mpls_iptunnel.h
mpls.h openvswitch: use mpls_hdr 2016-10-03 02:00:22 -04:00
mrp.h
ncsi.h net/ncsi: Introduce ncsi_stop_dev() 2016-10-04 02:11:51 -04:00
ndisc.h
neighbour.h
net_namespace.h netns: Add a limit on the number of net namespaces 2016-08-08 14:42:04 -05:00
net_ratelimit.h
netevent.h
netlabel.h
netlink.h
netprio_cgroup.h
netrom.h
nexthop.h
nl802154.h ieee802154: add netns support 2016-07-08 12:20:57 +02:00
p8022.h
ping.h
pkt_cls.h net/sched: pkt_cls: change tc actions order to be as the user sets 2016-09-28 05:02:44 -04:00
pkt_sched.h net: sched: convert qdisc linked list to hashtable 2016-08-10 17:19:02 -07:00
pptp.h pptp: Refactor the struct and macros of PPTP codes 2016-08-15 10:55:53 -07:00
protocol.h
psnap.h
raw.h
rawv6.h
red.h
regulatory.h
request_sock.h
rose.h
route.h net: ipv4: Remove l3mdev_get_saddr 2016-09-10 23:12:53 -07:00
rtnetlink.h
sch_generic.h sched: add and use qdisc_skb_head helpers 2016-09-19 01:47:18 -04:00
scm.h
secure_seq.h
slhc_vj.h
snmp.h
sock_reuseport.h
sock.h dccp: do not release listeners too soon 2016-11-03 16:16:50 -04:00
Space.h
stp.h
strparser.h kcm: Remove TCP specific references from kcm and strparser 2016-08-28 23:32:41 -04:00
switchdev.h switchdev: remove FIB offload infrastructure 2016-09-28 04:48:00 -04:00
tcp_states.h
tcp.h tcp: take care of truncations done by sk_filter() 2016-11-13 12:30:02 -05:00
timewait_sock.h
transp_v6.h
tso.h
udp_tunnel.h
udp.h udp: must lock the socket in udp_disconnect() 2016-10-20 14:45:52 -04:00
udplite.h
vsock_addr.h
vxlan.h vxlan: avoid using stale vxlan socket. 2016-10-29 20:56:31 -04:00
wext.h
wimax.h
x25.h
x25device.h
xfrm.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-09-23 06:46:57 -04:00