tcp: change default tcp hash size

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As time passed, available memory increased faster than number of
concurrent tcp sockets.

As a result, a machine with 4GB of ram gets a hash table
with 524288 slots, using 8388608 bytes of memory.

Lets change that by a 16x factor (one slot for 128 KB of ram)

Even if a small machine needs a _lot_ of sockets, tcp lookups are now
very efficient, using one cache line per socket.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Eric Dumazet 2012-11-30 10:08:52 +00:00 • committed by David S. Miller

parent abe303dbc2

commit fd90b29d75

1 changed files with 2 additions and 4 deletions

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net/ipv4/tcp.c

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