Eric Dumazet 23300d6a39 tcp: fix SO_RCVLOWAT hangs with fat skbs ... [ Upstream commit 24adbc1676 ] We autotune rcvbuf whenever SO_RCVLOWAT is set to account for 100% overhead in tcp_set_rcvlowat() This works well when skb->len/skb->truesize ratio is bigger than 0.5 But if we receive packets with small MSS, we can end up in a situation where not enough bytes are available in the receive queue to satisfy RCVLOWAT setting. As our sk_rcvbuf limit is hit, we send zero windows in ACK packets, preventing remote peer from sending more data. Even autotuning does not help, because it only triggers at the time user process drains the queue. If no EPOLLIN is generated, this can not happen. Note poll() has a similar issue, after commit c7004482e8 ("tcp: Respect SO_RCVLOWAT in tcp_poll().") Fixes: 03f45c883c ("tcp: avoid extra wakeups for SO_RCVLOWAT users") Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-05-20 08:20:10 +02:00
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6lowpan
9p
802
8021q	vlan: vlan_changelink() should propagate errors	2020-01-12 12:21:50 +01:00
appletalk
atm	net: atm: Reduce the severity of logging in unlink_clip_vcc	2019-11-18 17:08:20 -08:00
ax25
batman-adv	batman-adv: Fix refcnt leak in batadv_v_ogm_process	2020-05-14 07:58:28 +02:00
bluetooth	Bluetooth: RFCOMM: fix ODEBUG bug in rfcomm_dev_ioctl	2020-04-13 10:48:13 +02:00
bpf
bpfilter	net/bpfilter: remove superfluous testing message	2020-04-21 09:04:53 +02:00
bridge	net: add bool confirm_neigh parameter for dst_ops.update_pmtu	2020-01-04 19:18:58 +01:00
caif	net: use skb_queue_empty_lockless() in poll() handlers	2019-10-28 13:33:41 -07:00
can	can: j1939: j1939_sk_bind(): take priv after lock is held	2019-12-31 16:45:56 +01:00
ceph	libceph: fix alloc_msg_with_page_vector() memory leaks	2020-04-02 15:11:02 +02:00
core	net: fix a potential recursive NETDEV_FEAT_CHANGE	2020-05-20 08:20:08 +02:00
dcb
dccp	net: ipv6: add net argument to ip6_dst_lookup_flow	2019-12-18 16:08:40 +01:00
decnet	net: add bool confirm_neigh parameter for dst_ops.update_pmtu	2020-01-04 19:18:58 +01:00
dns_resolver	KEYS: Don't write out to userspace while holding key semaphore	2020-04-23 10:36:45 +02:00
dsa	net: dsa: Do not make user port errors fatal	2020-05-20 08:20:03 +02:00
ethernet	net: add annotations on hh->hh_len lockless accesses	2020-01-09 10:20:06 +01:00
hsr	hsr: check protocol version in hsr_newlink()	2020-04-21 09:04:44 +02:00
ieee802154	nl802154: add missing attribute validation for dev_type	2020-03-18 07:17:44 +01:00
ife
ipv4	tcp: fix SO_RCVLOWAT hangs with fat skbs	2020-05-20 08:20:10 +02:00
ipv6	Revert "ipv6: add mtu lock check in __ip6_rt_update_pmtu"	2020-05-20 08:20:09 +02:00
iucv
kcm
key
l2tp	l2tp: Allow management of tunnels and session in user namespace	2020-04-21 09:04:44 +02:00
l3mdev
lapb
llc	llc2: Fix return statement of llc_stat_ev_rx_null_dsap_xid_c (and _test_c)	2020-01-12 12:21:45 +01:00
mac80211	mac80211: add ieee80211_is_any_nullfunc()	2020-05-10 10:31:32 +02:00
mac802154
mpls	net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup	2019-12-18 16:08:42 +01:00
ncsi
netfilter	netfilter: nf_osf: avoid passing pointer to local var	2020-05-14 07:58:29 +02:00
netlabel	netlabel: cope with NULL catmap	2020-05-20 08:20:08 +02:00
netlink	netlink: Use netlink header as base to calculate bad attribute offset	2020-03-18 07:17:40 +01:00
netrom	net: netrom: Fix potential nr_neigh refcnt leak in nr_add_node	2020-04-29 16:33:08 +02:00
nfc	nfc: add missing attribute validation for vendor subcommand	2020-03-18 07:17:46 +01:00
nsh
openvswitch	net: openvswitch: ovs_ct_exit to be done under ovs_lock	2020-04-29 16:33:08 +02:00
packet	net/packet: tpacket_rcv: avoid a producer race condition	2020-04-01 11:01:35 +02:00
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: send msgs from local of same id as broadcast	2020-04-21 09:04:47 +02:00
rds	rds: ib: update WR sizes when bringing up connection	2019-11-16 12:59:08 -08:00
rfkill	rfkill: Fix incorrect check to avoid NULL pointer dereference	2020-01-12 12:21:33 +01:00
rose
rxrpc	rxrpc: Fix DATA Tx to disable nofrag for UDP on AF_INET6 socket	2020-05-02 08:48:47 +02:00
sched	net_sched: fix tcm_parent in tc filter dump	2020-05-20 08:20:07 +02:00
sctp	sctp: Fix bundling of SHUTDOWN with COOKIE-ACK	2020-05-14 07:58:24 +02:00
smc	net/smc: cancel event worker during device removal	2020-03-18 07:17:59 +01:00
strparser
sunrpc	SUNRPC: Fix GSS privacy computation of auth->au_ralign	2020-05-20 08:20:05 +02:00
switchdev
tipc	tipc: fix partial topology connection closure	2020-05-14 07:58:22 +02:00
tls	net/tls: Fix sk_psock refcnt leak when in tls_data_ready()	2020-05-14 07:58:22 +02:00
unix	af_unix: add compat_ioctl support	2020-01-17 19:48:52 +01:00
vmw_vsock	hv_sock: Remove the accept port restriction	2020-02-14 16:34:07 -05:00
wimax
wireless	nl80211: fix NL80211_ATTR_FTM_RESPONDER policy	2020-04-21 09:04:59 +02:00
x25	net/x25: Fix x25_neigh refcnt leak when receiving frame	2020-04-29 16:33:09 +02:00
xdp	xsk: Add missing check on user supplied headroom size	2020-04-23 10:36:21 +02:00
xfrm	xfrm: policy: Fix doulbe free in xfrm_policy_timer	2020-04-01 11:02:07 +02:00
compat.c
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
socket.c	compat_ioctl: handle SIOCOUTQNSD	2020-01-17 19:48:52 +01:00
sysctl_net.c