From owner-freebsd-stable  Mon Nov 12  9:49:32 2001
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From: Nate Williams <nate@yogotech.com>
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Date: Mon, 12 Nov 2001 10:49:23 -0700
To: Matthew Dillon <dillon@apollo.backplane.com>
Cc: Nate Williams <nate@yogotech.com>, stable@FreeBSD.ORG,
	jayanth@FreeBSD.ORG
Subject: Re: TCP NewReno causing wild performance fluctuations
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>     I think you should MFC this, Nate.

I too think it should be merged, but I wanted to get Jayanth's feedback
first.


Nate

> 
> :We've been using FreeBSD boxes as our reference ftp servers at work, and
> :because of the recent security issues, I've went through and updated a
> :number of our public boxes from 3.x -> 4.4.
> :
> :However, we're seeing significant variations in ftp throughput from
> :boxes that are directly connected on the lan segment.  If I disable the
> :New Reno code, things go back to normal (ie; no fluctuations).
> :
> :I went through the logfiles, and it turns out there has been one fix to
> :the code that hasn't been merged into stable.
> :
> :Rev1.139 in tcp_input.c has not (yet) been merged into -stable.
> :...
> :
> :I hand-merged this change back onto my box, installed a new kernel, and
> :now in my *very* minor testing things appear to be more normal.  My
> :question is should this fix be merged into stable, and would the lack of
> :this bugfix explain my performance results?
> :
> :Unfortunately, I don't haven't gotten any tcpdump outputs to analyze
> :what was going on, but I didn't want this bugfix to slip through the
> :cracks.
> :
> :Nate
> 

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