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Eric Dumazet adc9300e78 net: use jump_label to shortcut RPS if not setup 
Most machines dont use RPS/RFS, and pay a fair amount of instructions in
netif_receive_skb() / netif_rx() / get_rps_cpu() just to discover
RPS/RFS is not setup.

Add a jump_label named rps_needed.

If no device rps_map or global rps_sock_flow_table is setup,
netif_receive_skb() / netif_rx() do a single instruction instead of many
ones, including conditional jumps.

jmp +0    (if CONFIG_JUMP_LABEL=y)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-17 17:06:08 -05:00
..
datagram.c net: add skb frag size accessors 2011-10-19 03:10:46 -04:00
dev.c net: use jump_label to shortcut RPS if not setup 2011-11-17 17:06:08 -05:00
dev_addr_lists.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
drop_monitor.c net,rcu: convert call_rcu(free_dm_hw_stat) to kfree_rcu() 2011-05-07 22:50:59 -07:00
dst.c net: fix potential neighbour race in dst_ifdown() 2011-08-09 21:47:14 -07:00
ethtool.c net: ethtool: fix coding style 2011-11-16 22:00:14 -05:00
fib_rules.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
filter.c filter: use unsigned int to silence static checker warning 2011-10-19 19:35:51 -04:00
flow.c net/flow: Fix potential memory leak 2011-10-17 19:18:42 -04:00
gen_estimator.c net,rcu: convert call_rcu(__gen_kill_estimator) to kfree_rcu() 2011-05-07 22:50:57 -07:00
gen_stats.c net/core: EXPORT_SYMBOL cleanups 2010-07-12 12:57:55 -07:00
iovec.c net: Limit socket I/O iovec total length to INT_MAX. 2010-10-28 11:47:52 -07:00
kmap_skb.h net: convert core to skb paged frag APIs 2011-08-24 17:52:11 -07:00
link_watch.c net: linkwatch: allow vlans to get carrier changes faster 2011-09-15 15:36:34 -04:00
Makefile net: Compute protocol sequence numbers and fragment IDs using MD5. 2011-08-06 18:33:19 -07:00
neighbour.c neigh: new unresolved queue limits 2011-11-14 00:47:54 -05:00
net-sysfs.c net: use jump_label to shortcut RPS if not setup 2011-11-17 17:06:08 -05:00
net-sysfs.h xps: Add CONFIG_XPS 2010-11-28 18:24:14 -08:00
net-traces.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
net_namespace.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
netevent.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
netpoll.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
pktgen.c pktgen: remove ndelay() call 2011-10-20 17:00:21 -04:00
request_sock.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-08 13:47:38 -08:00
rtnetlink.c if_link: Add additional parameter to IFLA_VF_INFO for spoof checking 2011-10-16 13:15:38 -07:00
scm.c af_unix: dont send SCM_CREDENTIALS by default 2011-09-28 13:29:50 -04:00
secure_seq.c tcp: add const qualifiers where possible 2011-10-21 05:22:42 -04:00
skbuff.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2011-11-17 13:11:43 -05:00
sock.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2011-11-17 13:11:43 -05:00
stream.c net: Fix the condition passed to sk_wait_event() 2010-10-03 20:41:32 -07:00
sysctl_net_core.c net: use jump_label to shortcut RPS if not setup 2011-11-17 17:06:08 -05:00
timestamping.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
user_dma.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
utils.c net: Kill ratelimit.h dependency in linux/net.h 2011-05-27 13:41:33 -04:00