Messages in this thread | | | Date | Tue, 7 Jun 2005 08:45:15 +0800 | From | Skywind <> | Subject | Re: Is kernel 2.6.11 adjust tcp_max_syn_backlog incorrectly? |
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Any one know the reason?
I think the subject may change to "Is kernel 2.6.11 havn't set /proc network variable" or "Kernel 2.6.11 havn't set /proc network variable correctly by mem size"
> Is kernel 2.6.11 adjust tcp_max_syn_backlog incorrectly? > > Test Backgroud: > CPU: Intel P4 > Mem: 512Mb > The /etc/sysctl.conf and other haven't touch anything. > > I found a strange question: when I use kernel 2.6.11, the value of > /proc/sys/net/ipv4/tcp_max_syn_backlog is 256, > while kernel 2.6.10 on same computer the value is 1024. > > So I check the net/ipv4/[tcp.c, tcp_ipv4.c] and know when Mem >= 256Mb > the tcp_max_syn_backlog will be set to 1024, > but it is 256 in my test above.
> Some other variables that should be adjust all together with > tcp_max_syn_backlog are: > ip_local_port_range > tcp_max_tw_buckets > tcp_max_orphans > But they don't be adjust to correctly value(refer to net/ipv4/tcp.c) all. > > 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?
> Xu Gang (Skywind) > 2005/06/06 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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