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Date:      Tue, 12 Sep 2006 11:25:18 +0900
From:      gnn@FreeBSD.org
To:        Yar Tikhiy <yar@comp.chem.msu.su>
Cc:        src-committers@FreeBSD.org, cvs-src@FreeBSD.org, Mike Silbersack <silby@silby.com>, cvs-all@FreeBSD.org, Gleb Smirnoff <glebius@FreeBSD.org>, Ruslan Ermilov <ru@FreeBSD.org>
Subject:   Re: cvs commit: src/sys/netinet tcp_subr.c
Message-ID:  <m23baxes8h.wl%gnn@neville-neil.com>
In-Reply-To: <20060911223812.GA1439@comp.chem.msu.su>
References:  <200609081309.k88D9GCQ077401@repoman.freebsd.org> <20060908100034.M18039@odysseus.silby.com> <20060908154824.GK40020@FreeBSD.org> <20060911003357.V23530@odysseus.silby.com> <20060911142826.GG27667@FreeBSD.org> <20060911223812.GA1439@comp.chem.msu.su>

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At Tue, 12 Sep 2006 02:38:13 +0400,
Yar Tikhiy wrote:
> 
> On Mon, Sep 11, 2006 at 06:28:26PM +0400, Gleb Smirnoff wrote:
> > On Mon, Sep 11, 2006 at 12:36:57AM -0500, Mike Silbersack wrote:
> > M> >It stops creating any state (nor socket neither compressed tcptw) for the
> > M> >TCP connection, where both endpoints were local. This save a lot of
> > M> >resources on servers running HTTP accelerators, or database 
> > M> >servers+clients.
> > M> 
> > M> I think that you should change the description to say "Do not create TCP 
> > M> TIME_WAIT entries for local <-> local connections" (or something similar) 
> > M> to remove the ambiguity, and turn it on by default for 7.  This seems like 
> > M> a good idea, I'm jealous that I didn't think of it. :)
> > 
> > OOh, the sysctl name and its description were discussed with ru@, who
> > is our famous nitpicker. If you want to change name or description -
> > mail to him. /me hides
> 
> (It was me who suggested a different name for the sysctl in question.)
> 
> IMHO it's time to define a general style for new sysctl names.
> The first two points could be a) "foo" vs. "nofoo" for boolean
> knobs, and b) underscore usage.
> 
> Presently there seem to be few "nofoo" knobs in the system, e.g.:
> 
> 	# sysctl -aN | fgrep .no
> 	kern.nodump_coredump		-- should be coredump_nodump
> 	net.inet6.icmp6.nodeinfo	-- false match
> 	debug.nosleepwithlocks
> 	dev.fxp.0.noflow
> 
> I don't think new ones should be introduced; their logic would be
> unnecessarily vague.
> 
> OTOH, there are enough sysctl names containing an underscore to
> encourage using it in complex names.  An exception could be made
> for really short names, such as consisting of not more than 2 words,
> each being not longer than 4 letters.
> 
> What do you think about that, folks?

I am for it, in particular if it is documented.

Later,
George



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