Re: [RFC PATCH 0/4] inet: add second hash table

[Eric Dumazet <eric.dumazet@gmail.com>]

On Wed, 2012-05-30 at 10:36 +0300, Alexandru Copot wrote:
> This patchset implements all the operations needed to use a second
> (port,address) bind hash table for inet. It uses a similar approach
> as the UDP implementation.
> 
> The performance improvements for port allocation are very good and
> detailed in the last message.
> 
> This is based on a series of patches written by Lucian Grijincu at Ixia.
> 
> Signed-off-by: Alexandru Copot <alex.mihai.c@gmail.com>
> Cc: Daniel Baluta <dbaluta@ixiacom.com>
> Cc: Lucian Grijincu <lucian.grijincu@gmail.com>
> ---
> Alexandru Copot (4):
>       inet: add counter to inet_bind_hashbucket
>       inet: add a second bind hash
>       inet: add/remove inet buckets in the second bind hash
>       inet: use second hash in inet_csk_get_port
> 
>  include/net/inet_hashtables.h    |  140 +++++++++++++++++++++++++++++++--
>  include/net/inet_timewait_sock.h |    5 +-
>  net/dccp/proto.c                 |   37 ++++++++-
>  net/ipv4/inet_connection_sock.c  |   66 ++++++++--------
>  net/ipv4/inet_hashtables.c       |  158 ++++++++++++++++++++++++++++++++++++--
>  net/ipv4/inet_timewait_sock.c    |   16 ++--
>  net/ipv4/tcp.c                   |   17 ++++
>  net/ipv6/inet6_hashtables.c      |   95 +++++++++++++++++++++++
>  8 files changed, 477 insertions(+), 57 deletions(-)


Its a huge change (with many details to look at), for a yet to be
understood need.

What sensible workload needs this at all ?