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Eric Dumazet 1402d36601 tcp: introduce tcp_try_coalesce 
commit c8628155ec (tcp: reduce out_of_order memory use) took care of
coalescing tcp segments provided by legacy devices (linear skbs)

We extend this idea to fragged skbs, as their truesize can be heavy.

ixgbe for example uses 256+1024+PAGE_SIZE/2 = 3328 bytes per segment.

Use this coalescing strategy for receive queue too.

This contributes to reduce number of tcp collapses, at minimal cost, and
reduces memory overhead and packets drops.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Tom Herbert <therbert@google.com>
Cc: Maciej Żenczykowski <maze@google.com>
Cc: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-04-23 22:42:49 -04:00
..
9p net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
802 net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
8021q vlan: Stop using NLA_PUT*(). 2012-04-02 04:33:44 -04:00
appletalk net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
atm net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
ax25 net ax25: Simplify and cleanup the ax25 sysctl handling. 2012-04-20 21:22:28 -04:00
batman-adv batman-adv: skip the window protection test when the originator has no neighbours 2012-04-18 09:54:02 +02:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth 2012-04-09 15:47:49 -04:00
bridge net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
caif net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
can can: fix sparse warning for cgw_list 2012-04-16 21:08:18 +02:00
ceph net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
core net: add a limit parameter to sk_add_backlog() 2012-04-23 22:28:28 -04:00
dcb net/dcb: Add an optional max rate attribute 2012-04-05 05:08:04 -04:00
dccp net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
decnet net decnet: Convert to use register_net_sysctl 2012-04-20 21:22:29 -04:00
dns_resolver net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
dsa
econet sock: Introduce named constants for sk_reuse 2012-04-21 15:52:25 -04:00
ethernet net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
ieee802154 net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
ipv4 tcp: introduce tcp_try_coalesce 2012-04-23 22:42:49 -04:00
ipv6 tcp: sk_add_backlog() is too agressive for TCP 2012-04-23 22:28:28 -04:00
ipx net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
irda net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
iucv Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2012-03-22 18:15:32 -07:00
key net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
l2tp net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
lapb Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
llc net: add a limit parameter to sk_add_backlog() 2012-04-23 22:28:28 -04:00
mac80211 mac80211: add function retrieve average rssi 2012-04-16 14:38:49 -04:00
netfilter sock: Introduce named constants for sk_reuse 2012-04-21 15:52:25 -04:00
netlabel netlabel: use GFP flags from caller instead of GFP_ATOMIC 2012-03-22 19:29:57 -04:00
netlink netlink: dont drop packet but consume it 2012-04-19 14:23:55 -04:00
netrom net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
nfc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2012-04-18 14:27:48 -04:00
openvswitch net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
packet af_packet: packet_getsockopt() cleanup 2012-04-21 16:36:42 -04:00
phonet net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
rds sock: Introduce named constants for sk_reuse 2012-04-21 15:52:25 -04:00
rfkill device.h: cleanup users outside of linux/include (C files) 2012-03-11 14:27:37 -04:00
rose net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
rxrpc net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
sched pkt_sched: Stop using NLA_PUT*(). 2012-04-01 18:11:37 -04:00
sctp net: add a limit parameter to sk_add_backlog() 2012-04-23 22:28:28 -04:00
sunrpc sock: Introduce named constants for sk_reuse 2012-04-21 15:52:25 -04:00
tipc net: add a limit parameter to sk_add_backlog() 2012-04-23 22:28:28 -04:00
unix net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
wanrouter
wimax net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
wireless Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2012-04-18 14:27:48 -04:00
x25 net: add a limit parameter to sk_add_backlog() 2012-04-23 22:28:28 -04:00
xfrm net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
compat.c net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
Kconfig
Makefile
nonet.c
socket.c net: change big iov allocations 2012-04-21 16:24:20 -04:00
sysctl_net.c net: Remove register_net_sysctl_table 2012-04-20 21:22:30 -04:00