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Florian Westphal 5892f910f4 netfilter: conntrack: collect all entries in one cycle 
[ Upstream commit 4608fdfc07e116f9fc0895beb40abad7cdb5ee3d ]

Michal Kubecek reports that conntrack gc is responsible for frequent
wakeups (every 125ms) on idle systems.

On busy systems, timed out entries are evicted during lookup.
The gc worker is only needed to remove entries after system becomes idle
after a busy period.

To resolve this, always scan the entire table.
If the scan is taking too long, reschedule so other work_structs can run
and resume from next bucket.

After a completed scan, wait for 2 minutes before the next cycle.
Heuristics for faster re-schedule are removed.

GC_SCAN_INTERVAL could be exposed as a sysctl in the future to allow
tuning this as-needed or even turn the gc worker off.

Reported-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2021-09-03 10:08:12 +02:00
..
6lowpan 6lowpan: no need to check return value of debugfs_create functions 2019-07-06 12:50:01 +02:00
9p net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid 2020-11-05 11:43:20 +01:00
802 net/802/garp: fix memleak in garp_request_join() 2021-07-31 08:19:38 +02:00
8021q net: vlan: avoid leaks on register_vlan_dev() failures 2021-01-17 14:05:31 +01:00
appletalk appletalk: Fix skb allocation size in loopback case 2021-04-07 14:47:41 +02:00
atm atm: fix a memory leak of vcc->user_back 2020-10-01 13:17:58 +02:00
ax25 AX.25: Prevent integer overflows in connect and sendmsg 2020-07-31 18:39:31 +02:00
batman-adv batman-adv: Avoid WARN_ON timing related checks 2021-06-23 14:41:23 +02:00
bluetooth Bluetooth: hidp: use correct wait queue when removing ctrl_wait 2021-08-26 08:36:15 -04:00
bpf bpf/flow_dissector: support flags in BPF_PROG_TEST_RUN 2019-07-25 18:00:41 -07:00
bpfilter bpfilter: Specify the log level for the kmsg message 2021-07-14 16:53:33 +02:00
bridge net: bridge: fix memleak in br_add_if() 2021-08-18 08:57:00 +02:00
caif net: fix uninit-value in caif_seqpkt_sendmsg 2021-07-28 13:30:56 +02:00
can can: j1939: j1939_session_deactivate(): clarify lifetime of session object 2021-08-04 12:27:40 +02:00
ceph libceph: clear con->out_msg on Policy::stateful_server faults 2020-11-05 11:43:34 +01:00
core net: linkwatch: fix failure to restore device state across suspend/resume 2021-08-18 08:57:00 +02:00
dcb net: dcb: Accept RTM_GETDCB messages carrying set-like DCB commands 2021-01-23 15:57:59 +01:00
dccp dccp: add do-while-0 stubs for dccp_pr_debug macros 2021-08-26 08:36:16 -04:00
decnet net: decnet: Fix sleeping inside in af_decnet 2021-07-28 13:30:56 +02:00
dns_resolver KEYS: Don't write out to userspace while holding key semaphore 2020-04-23 10:36:45 +02:00
dsa net: dsa: fix error code getting shifted with 4 in dsa_slave_get_sset_count 2021-06-03 08:59:12 +02:00
ethernet net: add annotations on hh->hh_len lockless accesses 2020-01-09 10:20:06 +01:00
hsr hsr: use netdev_err() instead of WARN_ONCE() 2021-05-14 09:44:10 +02:00
ieee802154 net: Fix memory leak in ieee802154_raw_deliver 2021-08-18 08:57:00 +02:00
ife net: Fix Kconfig indentation 2019-09-26 08:56:17 +02:00
ipv4 net: igmp: increase size of mr_ifc_count 2021-08-18 08:57:01 +02:00
ipv6 ipv6: ip6_finish_output2: set sk into newly allocated nskb 2021-07-31 08:19:39 +02:00
iucv net/af_iucv: remove WARN_ONCE on malformed RX packets 2021-03-07 12:20:42 +01:00
kcm kcm: disable preemption in kcm_parse_func_strparser() 2019-09-27 10:27:14 +02:00
key af_key: relax availability checks for skb size calculation 2021-02-13 13:52:54 +01:00
l2tp l2tp: remove skb_dst_set() from l2tp_xmit_skb() 2020-07-22 09:32:47 +02:00
l3mdev ipv6: convert major tx path to use RT6_LOOKUP_F_DST_NOREF 2019-06-23 13:24:17 -07:00
lapb net: lapb: Copy the skb before sending a packet 2021-02-10 09:25:28 +01:00
llc net: llc: fix skb_over_panic 2021-08-04 12:27:39 +02:00
mac80211 mac80211: remove iwlwifi specific workaround NDPs of null_response 2021-07-14 16:53:32 +02:00
mac802154 net: mac802154: Fix general protection fault 2021-04-14 08:24:18 +02:00
mpls net: avoid infinite loop in mpls_gso_segment when mpls_hlen == 0 2021-03-17 17:03:31 +01:00
ncsi net/ncsi: Avoid channel_monitor hrtimer deadlock 2021-04-14 08:24:15 +02:00
netfilter netfilter: conntrack: collect all entries in one cycle 2021-09-03 10:08:12 +02:00
netlabel netlabel: Fix memory leak in netlbl_mgmt_add_common 2021-07-14 16:53:29 +02:00
netlink netlink: disable IRQs for netlink_lock_table() 2021-06-16 11:59:34 +02:00
netrom netrom: Decrease sock refcount when sock timers expire 2021-07-28 13:30:56 +02:00
nfc net/nfc/rawsock.c: fix a permission check bug 2021-06-16 11:59:33 +02:00
nsh treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
openvswitch ovs: clear skb->tstamp in forwarding path 2021-08-26 08:36:19 -04:00
packet net/packet: annotate accesses to po->ifindex 2021-06-30 08:47:48 -04:00
phonet net: use skb_queue_empty_lockless() in poll() handlers 2019-10-28 13:33:41 -07:00
psample net: psample: fix skb_over_panic 2019-12-04 22:30:54 +01:00
qrtr net: qrtr: fix another OOB Read in qrtr_endpoint_post 2021-09-03 10:08:12 +02:00
rds net: rds: fix memory leak in rds_recvmsg 2021-06-23 14:41:24 +02:00
rfkill rfkill: Fix use-after-free in rfkill_resume() 2020-11-24 13:29:05 +01:00
rose rose: Fix Null pointer dereference in rose_send_frame() 2020-12-08 10:40:23 +01:00
rxrpc rxrpc: Fix clearance of Tx/Rx ring when releasing a call 2021-02-17 10:35:18 +01:00
sched net: sched: act_mirred: Reset ct info when mirror/redirect skb 2021-08-18 08:56:59 +02:00
sctp sctp: move the active_key update after sh_keys is added 2021-08-12 13:20:57 +02:00
smc Revert "net/smc: fix a NULL pointer dereference" 2021-06-03 08:59:08 +02:00
strparser Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-22 08:59:24 -04:00
sunrpc SUNRPC: Should wake up the privileged task firstly. 2021-07-14 16:53:05 +02:00
switchdev net: switchdev: don't set port_obj_info->handled true when -EOPNOTSUPP 2021-02-07 15:35:46 +01:00
tipc tipc: fix sleeping in tipc accept routine 2021-08-04 12:27:39 +02:00
tls tls: prevent oversized sendfile() hangs by ignoring MSG_MORE 2021-07-14 16:53:31 +02:00
unix af_unix: fix garbage collect vs MSG_PEEK 2021-07-31 08:19:37 +02:00
vmw_vsock vsock/virtio: avoid potential deadlock when vsock device remove 2021-08-18 08:57:01 +02:00
wimax wimax: no need to check return value of debugfs_create functions 2019-08-10 15:25:47 -07:00
wireless cfg80211: Fix possible memory leak in function cfg80211_bss_update 2021-08-04 12:27:38 +02:00
x25 net/x25: Return the correct errno code 2021-06-18 09:59:00 +02:00
xdp xsk: Simplify detection of empty and full rings 2021-05-22 11:38:27 +02:00
xfrm xfrm: Fix error reporting in xfrm_state_construct. 2021-07-19 08:53:11 +02:00
Kconfig net: Fix CONFIG_NET_CLS_ACT=n and CONFIG_NFT_FWD_NETDEV={y, m} build 2020-04-01 11:02:18 +02:00
Makefile net: split out functions related to registering inflight socket files 2019-02-28 08:24:23 -07:00
compat.c net: Return the correct errno code 2021-06-18 09:59:00 +02:00
socket.c net: make get_net_ns return error if NET_NS is disabled 2021-06-23 14:41:25 +02:00
sysctl_net.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00