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0a2cf20c3f
linux/net
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Soheil Hassas Yeganeh 0a2cf20c3f tcp: remove SKBTX_ACK_TSTAMP since it is redundant 
The SKBTX_ACK_TSTAMP flag is set in skb_shinfo->tx_flags when
the timestamp of the TCP acknowledgement should be reported on
error queue. Since accessing skb_shinfo is likely to incur a
cache-line miss at the time of receiving the ack, the
txstamp_ack bit was added in tcp_skb_cb, which is set iff
the SKBTX_ACK_TSTAMP flag is set for an skb. This makes
SKBTX_ACK_TSTAMP flag redundant.

Remove the SKBTX_ACK_TSTAMP and instead use the txstamp_ack bit
everywhere.

Note that this frees one bit in shinfo->tx_flags.

Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Suggested-by: Willem de Bruijn <willemb@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-28 16:06:10 -04:00
..
6lowpan 6lowpan: move mac802154 header 2016-04-13 10:41:10 +02:00
9p net/9p: convert to new CQ API 2016-03-10 20:54:09 -05:00
802
8021q vlan: propagate gso_max_segs 2016-03-17 21:05:01 -04:00
appletalk appletalk: fix erroneous return value 2016-02-18 14:59:34 -05:00
atm net: Generalise wq_has_sleeper helper 2015-11-30 14:47:33 -05:00
ax25 ax25: add link layer header validation function 2016-03-09 22:13:01 -05:00
batman-adv batman-adv: clarify CFG80211 dependency 2016-03-02 13:45:47 -05:00
bluetooth Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 2016-04-26 13:15:56 -04:00
bridge ipv6: rename IP6_INC_STATS_BH() 2016-04-27 22:48:24 -04:00
caif net: caif: fix misleading indentation 2016-03-14 13:09:50 -04:00
can sock: enable timestamping using control messages 2016-04-04 15:50:30 -04:00
ceph mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
core net: rename NET_{ADD|INC}_STATS_BH() 2016-04-27 22:48:24 -04:00
dcb
dccp net: snmp: kill STATS_BH macros 2016-04-27 22:48:25 -04:00
decnet decnet: Do not build routes to devices without decnet private data. 2016-04-10 23:01:30 -04:00
dns_resolver net: dns_resolver: convert time_t to time64_t 2015-11-18 16:27:46 -05:00
dsa net: dsa: remove tag_protocol from dsa_switch 2016-04-21 13:43:11 -04:00
ethernet eth: Pull header from first fragment via eth_get_headlen 2016-02-24 13:58:05 -05:00
hsr NLA_BINARY misuse bug in HSR 2016-04-21 13:59:08 -04:00
ieee802154 Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 2016-04-26 13:15:56 -04:00
ipv4 tcp: remove SKBTX_ACK_TSTAMP since it is redundant 2016-04-28 16:06:10 -04:00
ipv6 ipv6: kill ICMP6MSGIN_INC_STATS_BH() 2016-04-27 22:48:25 -04:00
ipx
irda Merge 4.5-rc4 into tty-next 2016-02-14 14:36:04 -08:00
iucv af_iucv: Validate socket address length in iucv_sock_bind() 2016-01-19 14:21:08 -05:00
kcm kcm: Add receive message timeout 2016-03-09 16:36:15 -05:00
key
l2tp l2tp: use nla_put_u64_64bit() 2016-04-25 15:09:10 -04:00
l3mdev net: l3mdev: address selection should only consider devices in L3 domain 2016-02-26 14:22:26 -05:00
lapb
llc sock: tigthen lockdep checks for sock_owned_by_user 2016-04-13 22:37:20 -04:00
mac80211 cfg80211: remove enum ieee80211_band 2016-04-12 15:56:15 +02:00
mac802154 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-03-19 10:05:34 -07:00
mpls GSO: Add GSO type for fixed IPv4 ID 2016-04-14 16:23:40 -04:00
netfilter netfilter/ipvs: use nla_put_u64_64bit() 2016-04-25 15:09:11 -04:00
netlabel netlabel: do not initialise statics to NULL 2016-03-07 11:08:26 -05:00
netlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-04-23 18:51:33 -04:00
netrom
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-03-19 10:05:34 -07:00
openvswitch ovs: align nlattr properly when needed 2016-04-26 12:00:48 -04:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-04-23 18:51:33 -04:00
phonet sock: struct proto hash function may error 2016-02-11 03:54:14 -05:00
rds RDS: TCP: Call pskb_extract() helper function 2016-04-25 16:54:14 -04:00
rfkill rfkill: Use switch to demux userspace operations 2016-04-05 10:48:53 +02:00
rose
rxrpc net: udp: rename UDP_INC_STATS_BH() 2016-04-27 22:48:23 -04:00
sched net: remove NETDEV_TX_LOCKED support 2016-04-26 15:53:05 -04:00
sctp net: rename NET_{ADD|INC}_STATS_BH() 2016-04-27 22:48:24 -04:00
sunrpc net: udp: rename UDP_INC_STATS_BH() 2016-04-27 22:48:23 -04:00
switchdev switchdev: Adding complete operation to deferred switchdev ops 2016-04-24 14:23:32 -04:00
tipc tipc: fix stale links after re-enabling bearer 2016-04-24 14:35:07 -04:00
unix Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-02-23 00:09:14 -05:00
vmw_vsock VSOCK: Only check error on skb_recv_datagram when skb is NULL 2016-04-19 20:42:01 -04:00
wimax
wireless wireless: use nla_put_u64_64bit() 2016-04-25 15:09:11 -04:00
x25
xfrm xfrm: align nlattr properly when needed 2016-04-23 20:13:25 -04:00
compat.c
Kconfig Make DST_CACHE a silent config option 2016-03-21 22:56:38 -04:00
Makefile kcm: Kernel Connection Multiplexor module 2016-03-09 16:36:14 -05:00
socket.c tcp: remove SKBTX_ACK_TSTAMP since it is redundant 2016-04-28 16:06:10 -04:00
sysctl_net.c