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    SubjectRe: Is kernel 2.6.11 adjust tcp_max_syn_backlog incorrectly?
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    Skywind <gnuwind@gmail.com> writes:
    >
    > It seems that kernel don't adjust these value automatic, is this a bug?
    >
    > I guess the mechanism of tcp.c in 2.6.11 have some changes(between
    > 2.6.10), and it conduce to this result,
    > Is this guess correctly?

    Yes, there were some changes here when it was converted to a common
    function for all hash tables (alloc_large_system_hash - the function
    with the argument list from hell). Anyways, here's a quick fix.

    DaveM for your consideration.

    Adjust TCP mem order check to new alloc_large_system_hash

    Signed-off-by: Andi Kleen <ak@suse.de>

    --- linux-2.6.11-work/net/ipv4/tcp.c~ 2005-03-02 08:37:51.000000000 +0100
    +++ linux-2.6.11-work/net/ipv4/tcp.c 2005-06-11 12:16:22.000000000 +0200
    @@ -2337,7 +2337,7 @@
    (tcp_bhash_size * sizeof(struct tcp_bind_hashbucket));
    order++)
    ;
    - if (order > 4) {
    + if (order >= 4) {
    sysctl_local_port_range[0] = 32768;
    sysctl_local_port_range[1] = 61000;
    sysctl_tcp_max_tw_buckets = 180000;


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