> I do not understand why it is broken to lower the value below 2 hours when it
> can be lowered even now in linux system wide. Try echo
> 2>/proc/sys/net/ipv4/tcp_keepalive_time. Then all keepalive
It is broken already then IMHO 8).
> The RFC 1122 says that it MUST be configurable and MUST default to no less than
> 2 hours.
RFC1122 is a sore point with a lot of people. Real blood was spilt over tcp
keepalives. The whole concept should never have been allowed to get into the
protocol.
I've benchmarked your patch - you seem to be right. I can't measure performance
differences above the noise level between the patched and unpatched kernel.
Alan
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