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| author |   Eric Dumazet <edumazet@google.com> | 2012-08-03 21:27:25 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2012-08-04 01:27:57 -0700 |
| commit | 9eb43e765368f835d92c93844ebce30da7efeb84 (patch) | |
| tree | c8ae2176f95886fafd8e70e7c32f2aa6257ca73d /include/net/snmp.h | |
| parent | ipv4: change inet_addr_hash() (diff) | |
| download | linux-dev-9eb43e765368f835d92c93844ebce30da7efeb84.tar.xz linux-dev-9eb43e765368f835d92c93844ebce30da7efeb84.zip | |
ipv4: Introduce IN_DEV_NET_ROUTE_LOCALNET
performance profiles show a high cost in the IN_DEV_ROUTE_LOCALNET()
call done in ip_route_input_slow(), because of multiple dereferences,
even if cache lines are clean and available in cpu caches.
Since we already have the 'net' pointer, introduce
IN_DEV_NET_ROUTE_LOCALNET() macro avoiding two dereferences
(dev_net(in_dev->dev))
Also change the tests to use IN_DEV_NET_ROUTE_LOCALNET() only if saddr
or/and daddr are loopback addresse.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/snmp.h')
0 files changed, 0 insertions, 0 deletions