Big servers have bloated bind table, making very hard to succeed
ephemeral port allocations, without special containers/namespace tricks.
This patch series extends the strategy added in commit 07f4c90062f8
("tcp/dccp: try to not exhaust ip_local_port_range in connect()").
Since ports used by connect() are much likely to be shared among them,
we give a hint to both bind() and connect() to keep the crowds separated
if possible.
Of course, if on a specific host an application needs to allocate ~30000
ports using bind(), it will still be able to do so. Same for ~30000 connect()
to a unique 2-tuple (dst addr, dst port)
New implemetation is also more friendly to softirqs and reschedules.
Eric Dumazet (2):
tcp/dccp: better use of ephemeral ports in connect()
tcp/dccp: better use of ephemeral ports in bind()
net/ipv4/inet_connection_sock.c | 231 +++++++++++++++++++---------------------
net/ipv4/inet_hashtables.c | 170 ++++++++++++++---------------
2 files changed, 195 insertions(+), 206 deletions(-)
--
2.7.0.rc3.207.g0ac5344
