Re: TCP 2MSL on loopback

2007-03-06 Thread Howard Chu
but I suppose that may no longer be true. True. Thankfully, the web learned to use persistent connections so later versions of SPECweb benchmarking make use of persistent connections. As a complete aside, I think it's about time for a SPECldap benchmark... -- -- Howard Chu Chie

Re: TCP 2MSL on loopback

2007-03-06 Thread Howard Chu
on a CPU's instruction cache... -- -- Howard Chu Chief Architect, Symas Corp. http://www.symas.com Director, Highland Sunhttp://highlandsun.com/hyc Chief Architect, OpenLDAP http://www.openldap.org/project/ - To unsubscribe from this list: send the line "unsubscribe

Re: TCP 2MSL on loopback

2007-03-06 Thread Howard Chu
ey still have to preserve the reliable in-order delivery semantics of TCP, otherwise the system is broken. It may not have much use, sure, I admitted that much from the outset. So I'll leave it at this, thanks for the feedback. -- -- Howard Chu Chief Architect, Symas Corp. http://www

Re: TCP 2MSL on loopback

2007-03-06 Thread Howard Chu
other hand, being able to configure a small MSL for the loopback device is perfectly safe. Being able to configure a small MSL for other interfaces may be safe, depending on the rest of the network layout. -- -- Howard Chu Chief Architect, Symas Corp. http://www.symas.com Director, H

Re: TCP 2MSL on loopback

2007-03-06 Thread Howard Chu
/proc/sys/net/ipv4/tcp_tw_reuse:0 /proc/sys/net/ipv4/tcp_window_scaling:1 /proc/sys/net/ipv4/tcp_wmem:409616384 4194304 /proc/sys/net/ipv4/tcp_workaround_signed_windows:0 -- -- Howard Chu Chief Architect, Symas Corp. http://www.symas.com Director, Highland Sunhttp

Re: TCP 2MSL on loopback

2007-03-06 Thread Howard Chu
increasing sequence numbers aren't a security risk if there's still a randomly determined gap from one connection to the next. But I don't think it's necessary to consider this at the moment. -- -- Howard Chu Chief Architect, Symas Corp. http://www.symas.com Dir

Re: TCP 2MSL on loopback

2007-03-06 Thread Howard Chu
Eric Dumazet wrote: On Tuesday 06 March 2007 10:22, Howard Chu wrote: It's a combination of 2MSL and /proc/sys/net/ipv4/ip_local_port_range - on my system the default port range is 32768-61000. That means if I use up 28232 ports in less than 2MSL then everything stops. netstat will show

Re: TCP 2MSL on loopback

2007-03-06 Thread Howard Chu
Eric Dumazet wrote: On Monday 05 March 2007 12:20, Howard Chu wrote: Why is the Maximum Segment Lifetime a global parameter? Surely the maximum possible lifetime of a particular TCP segment depends on the actual connection. At the very least, it would be useful to be able to set it on a per

Re: The Proposed Linux kevent API

2006-08-22 Thread Howard Chu
eave it in place, as I proposed back here? http://groups.google.com/group/linux.kernel/browse_frm/ thread/57847cfedb61bdd5/8d02afa60a8f83af?lnk=gst&q=equeue&rnum= 1#8d02afa60a8f83af -- -- Howard Chu Chief Architect, Symas Corp. http://www.symas.com Director, Highland Sunhttp://h