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author | Eric Dumazet | 2011-11-18 18:32:46 +0100 |
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committer | David S. Miller | 2011-11-21 22:38:08 +0100 |
commit | a2d7ec58ac09f30ab726f216827f7c7095b2a98f (patch) | |
tree | 1b733090406abc18c42308e84703dcb703e15125 /fs/isofs | |
parent | tg3: switch to build_skb() infrastructure (diff) | |
download | kernel-qcow2-linux-a2d7ec58ac09f30ab726f216827f7c7095b2a98f.tar.gz kernel-qcow2-linux-a2d7ec58ac09f30ab726f216827f7c7095b2a98f.tar.xz kernel-qcow2-linux-a2d7ec58ac09f30ab726f216827f7c7095b2a98f.zip |
netfilter: use jump_label for nf_hooks
On configs where CONFIG_JUMP_LABEL=y, we can replace in fast path a
load/compare/conditional jump by a single jump with no dcache reference.
Jump target is modified as soon as nf_hooks[pf][hook] switches from
empty state to non empty states. jump_label state is kept outside of
nf_hooks array so has no cost on cpu caches.
This patch removes the test on CONFIG_NETFILTER_DEBUG : No need to call
nf_hook_slow() at all if nf_hooks[pf][hook] is empty, this didnt give
useful information, but slowed down things a lot.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Patrick McHardy <kaber@trash.net>
CC: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/isofs')
0 files changed, 0 insertions, 0 deletions