Hi David Here is the second patch, after one for sockets_allocated Thank you [PATCH] net: Use a percpu_counter for orphan_count Instead of using one atomic_t per protocol, use a percpu_counter for "orphan_count", to reduce cache line contention on heavy duty network servers. Signed-off-by: Eric Dumazet --- include/net/sock.h | 2 +- include/net/tcp.h | 2 +- net/dccp/dccp.h | 2 +- net/dccp/proto.c | 16 ++++++++++------ net/ipv4/inet_connection_sock.c | 4 ++-- net/ipv4/proc.c | 2 +- net/ipv4/tcp.c | 12 +++++++----- net/ipv4/tcp_timer.c | 2 +- 8 files changed, 24 insertions(+), 18 deletions(-)