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| author |   Eric Dumazet <eric.dumazet@gmail.com> | 2010-06-14 19:35:21 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-06-14 23:13:08 -0700 |
| commit | d6cc1d642de9284cb26488ea390d915b50ee2504 (patch) | |
| tree | 7652471f541c11f63f54e282a04a9cba614e8d5e /drivers/net/bnx2x_link.c | |
| parent | loopback: Implement 64bit stats on 32bit arches (diff) | |
| download | linux-dev-d6cc1d642de9284cb26488ea390d915b50ee2504.tar.xz linux-dev-d6cc1d642de9284cb26488ea390d915b50ee2504.zip | |
inetpeer: various changes
Try to reduce cache line contentions in peer management, to reduce IP
defragmentation overhead.
- peer_fake_node is marked 'const' to make sure its not modified.
(tested with CONFIG_DEBUG_RODATA=y)
- Group variables in two structures to reduce number of dirtied cache
lines. One named "peers" for avl tree root, its number of entries, and
associated lock. (candidate for RCU conversion)
- A second one named "unused_peers" for unused list and its lock
- Add a !list_empty() test in unlink_from_unused() to avoid taking lock
when entry is not unused.
- Use atomic_dec_and_lock() in inet_putpeer() to avoid taking lock in
some cases.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions