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9d21493b4b
linux/net
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Eric Dumazet 9d21493b4b net: tx scalability works : trans_start 
struct net_device trans_start field is a hot spot on SMP and high performance
devices, particularly multi queues ones, because every transmitter dirties
it. Is main use is tx watchdog and bonding alive checks.

But as most devices dont use NETIF_F_LLTX, we have to lock
a netdev_queue before calling their ndo_start_xmit(). So it makes
sense to move trans_start from net_device to netdev_queue. Its update
will occur on a already present (and in exclusive state) cache line, for
free.

We can do this transition smoothly. An old driver continue to
update dev->trans_start, while an updated one updates txq->trans_start.

Further patches could also put tx_bytes/tx_packets counters in 
netdev_queue to avoid dirtying dev->stats (vlan device comes to mind)

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-05-17 20:55:16 -07:00
..
9p
802 tr: fix leakage of device in net/802/tr.c 2009-04-11 01:43:17 -07:00
8021q Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-04-29 20:30:35 -07:00
appletalk proc 2/2: remove struct proc_dir_entry::owner 2009-03-31 01:14:44 +04:00
atm Subject: [PATCH] br2684: restore net_dev initialization 2009-05-02 13:49:36 -07:00
ax25 ax25: proc uid file misses header 2009-04-20 02:14:59 -07:00
bluetooth Bluetooth: Move dev_set_name() to a context that can sleep 2009-05-05 13:26:08 -07:00
bridge netfilter: bridge: allow fragmentation of VLAN packets traversing a bridge 2009-04-20 17:12:35 +02:00
can can: Network Drop Monitor: Make use of consume_skb() in af_can.c 2009-04-17 01:38:46 -07:00
core tcp: tcp_prequeue() can use keyed wakeups 2009-05-17 20:44:43 -07:00
dcb
dccp
decnet ipv4: remove an unused parameter from configure method of fib_rules_ops. 2009-05-17 11:59:45 -07:00
dsa dsa: add switch chip cascading support 2009-03-21 19:06:54 -07:00
econet
ethernet
ipv4 ipv4: remove an unused parameter from configure method of fib_rules_ops. 2009-05-17 11:59:45 -07:00
ipv6 net: remove needless (now buggy) & from dev->dev_addr 2009-05-17 11:59:47 -07:00
ipx ipx: use constant for strings and desciptor 2009-03-21 19:06:51 -07:00
irda proc tty: switch ircomm to ->proc_fops 2009-04-01 08:59:10 -07:00
iucv af_iucv: Fix merge. 2009-04-23 06:37:16 -07:00
key
lapb
llc net: remove needless (now buggy) & from dev->dev_addr (part2) 2009-05-17 11:59:53 -07:00
mac80211 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 2009-05-08 12:46:17 -07:00
netfilter Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6 2009-05-05 12:00:53 -07:00
netlabel netlabel: Always remove the correct address selector 2009-04-22 00:46:09 -07:00
netlink Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-03-26 15:23:24 -07:00
netrom net/netrom: Fix socket locking 2009-04-22 00:49:51 -07:00
packet packet: avoid warnings when high-order page allocation fails 2009-04-15 03:39:52 -07:00
phonet trivial: fix typos/grammar errors in Kconfig texts 2009-03-30 15:22:01 +02:00
rds ERR_PTR() dereference in net/rds/ib.c 2009-04-09 17:21:22 -07:00
rfkill net/rfkill/rfkill.c: fix build with CONFIG_RFKILL_LEDS=n 2009-05-06 15:14:40 -04:00
rose Revert "rose: zero length frame filtering in af_rose.c" 2009-04-14 20:28:00 -07:00
rxrpc
sched net: tx scalability works : trans_start 2009-05-17 20:55:16 -07:00
sctp sctp: add feature bit for SCTP offload in hardware 2009-04-28 01:53:14 -07:00
sunrpc Merge branch 'for-2.6.30' of git://linux-nfs.org/~bfields/linux 2009-04-06 13:25:56 -07:00
tipc net: remove needless (now buggy) & from dev->dev_addr 2009-05-17 11:59:47 -07:00
unix New helper - current_umask() 2009-03-31 23:00:26 -04:00
wanrouter
wimax Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-05-08 02:48:30 -07:00
wireless Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 2009-05-08 12:46:17 -07:00
x25 af_rose/x25: Sanity check the maximum user frame size 2009-03-27 00:28:21 -07:00
xfrm xfrm: wrong hash value for temporary SA 2009-04-27 02:58:59 -07:00
compat.c
Kconfig net: remove stale reference to fastroute from Kconfig help text 2009-05-07 16:31:01 -07:00
Makefile
nonet.c
socket.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-04-06 18:05:43 -07:00
sysctl_net.c
TUNABLE