| commit | 355b590ca24a53f5e2f6999218b5321eaf730a7e | [log] [tgz] |
|---|---|---|
| author | Eric Dumazet <edumazet@google.com> | Fri May 01 10:37:49 2015 -0700 |
| committer | David S. Miller <davem@davemloft.net> | Fri May 01 19:44:00 2015 -0400 |
| tree | e6a48af10ed15aca0c6d6a34533aef5636714c1c | |
| parent | 9dd3c797496affd699805c8a9d8429ad318c892f [diff] |
ipv4: speedup ip_idents_reserve() Under stress, ip_idents_reserve() is accessing a contended cache line twice, with non optimal MESI transactions. If we place timestamps in separate location, we reduce this pressure by ~50% and allow atomic_add_return() to issue a Request for Ownership. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>