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| author | Eric Dumazet <edumazet@google.com> | 2016-05-02 10:56:27 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-03 16:02:36 -0400 |
| commit | 1d2077ac0165c0d173a2255e37cf4dc5033d92c7 (patch) | |
| tree | fc18bebb7e5ffe2109fd61c56230c5f47d5f313b /net/ipv6/icmp.c | |
| parent | e34b1638d02bef8c3278af30ee73077c5babc082 (diff) | |
| download | linux-1d2077ac0165c0d173a2255e37cf4dc5033d92c7.tar.bz2 | |
net: add __sock_wfree() helper
Hosts sending lot of ACK packets exhibit high sock_wfree() cost
because of cache line miss to test SOCK_USE_WRITE_QUEUE
We could move this flag close to sk_wmem_alloc but it is better
to perform the atomic_sub_and_test() on a clean cache line,
as it avoid one extra bus transaction.
skb_orphan_partial() can also have a fast track for packets that either
are TCP acks, or already went through another skb_orphan_partial()
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/icmp.c')
0 files changed, 0 insertions, 0 deletions