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def87cf420
linux/net
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Krishna Kumar def87cf420 tcp: Slightly optimize tcp_sendmsg 
Slightly optimize tcp_sendmsg since NETIF_F_SG is used many
times iteratively in the loop. The only other modification is
to change:
			} else if (i == MAX_SKB_FRAGS ||
				   (!i &&
				   !(sk->sk_route_caps & NETIF_F_SG))) {
	to:
			} else if (i == MAX_SKB_FRAGS || !sg) {

The reason why this change is correct: this code (other than
the MAX_SKB_FRAGS case) executes only due to the else part
of: "if (skb_tailroom(skb) > 0) {" - i.e. there was no space
in the skb to put the data inline. Hence SG is false is a
sufficient condition, and there is no way a fragment can be
added to the skb.

Changelog:
	- Added the above explanation for the change

Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-23 14:13:29 -08:00
..
9p 9p connect fixes 2009-12-16 12:16:41 -05:00
802 sysctl net: Remove unused binary sysctl code 2009-11-12 02:05:06 -08:00
8021q netdevice: provide common routine for macvlan and vlan operstate management 2009-12-03 15:59:22 -08:00
appletalk Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
atm atm: [br2684] allow routed mode operation again 2009-12-08 20:22:31 -08:00
ax25 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
bluetooth Bluetooth: Fix L2CAP locking scheme regression 2009-12-17 12:07:25 -08:00
bridge Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
can net: Move && and || to end of previous line 2009-11-29 16:55:45 -08:00
core Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-12-16 10:33:18 -08:00
dcb net: Move && and || to end of previous line 2009-11-29 16:55:45 -08:00
dccp kfifo: rename kfifo_put... into kfifo_in... and kfifo_get... into kfifo_out... 2009-12-22 14:17:56 -08:00
decnet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
dsa netdev: convert pseudo-devices to netdev_tx_t 2009-09-01 01:13:07 -07:00
econet net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
ethernet remove deprecated and not used: print_mac() 2009-11-15 22:21:34 -08:00
ieee802154 net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
ipv4 tcp: Slightly optimize tcp_sendmsg 2009-12-23 14:13:29 -08:00
ipv6 ipv6: fix an oops when force unload ipv6 module 2009-12-18 20:25:13 -08:00
ipx Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
irda tree-wide: convert open calls to remove spaces to skip_spaces() lib function 2009-12-15 08:53:32 -08:00
iucv const: constify remaining dev_pm_ops 2009-12-15 08:53:25 -08:00
key xfrm: Fix truncation length of authentication algorithms installed via PF_KEY 2009-12-11 15:07:57 -08:00
lapb net: remove NET_RX_BAD and NET_RX_CN* defines 2009-07-05 19:15:35 -07:00
llc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
mac80211 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 2009-12-21 11:54:49 -08:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-12-16 10:33:18 -08:00
netlabel Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-12-09 19:43:33 -08:00
netlink net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
netrom Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
packet packet: dont call sleeping functions while holding rcu_read_lock() 2009-12-15 21:12:21 -08:00
phonet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
rds Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2009-12-16 10:32:31 -08:00
rfkill net/rfkill/core.c: work around gcc-4.0.2 silliness 2009-12-07 16:51:23 -05:00
rose Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
rxrpc net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
sched Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-12-09 19:43:33 -08:00
sctp Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-12-09 19:43:33 -08:00
sunrpc Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6 2009-12-16 10:47:44 -08:00
tipc net: Move && and || to end of previous line 2009-11-29 16:55:45 -08:00
unix Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
wanrouter headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
wimax Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-12-09 19:43:33 -08:00
wireless wireless: update old static regulatory domain rules 2009-12-10 16:21:51 -05:00
x25 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
compat.c net: use compat helper functions in compat_sys_recvmmsg 2009-12-11 15:07:57 -08:00
Kconfig net/compat/wext: send different messages to compat tasks 2009-07-15 08:53:39 -07:00
Makefile net: remove redundant sched/ in net/Makefile 2009-07-12 20:11:14 -07:00
nonet.c
socket.c fs: no games with DCACHE_UNHASHED 2009-12-17 10:51:40 -05:00
sysctl_net.c net: sysctl_net - use net_eq to compare nets 2009-03-16 16:23:30 +01:00
TUNABLE