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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-07-18 03:16:33 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-07-18 10:41:18 -0700 |
| commit | 5c74501f76360ce6f410730b9b5e5976f38e8504 (patch) | |
| tree | 4965fe06affeaa121afa4a18b0644cbeb9e7d639 /Documentation/stable_kernel_rules.txt | |
| parent | d3aaeb38c40e5a6c08dd31a1b64da65c4352be36 (diff) | |
ipv4: save cpu cycles from check_leaf()
Compiler is not smart enough to avoid double BSWAP instructions in
ntohl(inet_make_mask(plen)).
Lets cache this value in struct leaf_info, (fill a hole on 64bit arches)
With route cache disabled, this saves ~2% of cpu in udpflood bench on
x86_64 machine.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/stable_kernel_rules.txt')
0 files changed, 0 insertions, 0 deletions