Date: Sun, 20 May 2007 14:24:28 +0930 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: Doug Barton <dougb@FreeBSD.org> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org, edwin@freebsd.org Subject: Re: cvs commit: src/etc services Message-ID: <20070520045428.GG2288@wantadilla.lemis.com> In-Reply-To: <464FD1F7.2010907@FreeBSD.org> References: <200705200331.l4K3Vq3V079479@repoman.freebsd.org> <464FD1F7.2010907@FreeBSD.org>
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--KIzF6Cje4W/osXrF Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Saturday, 19 May 2007 at 21:43:35 -0700, Doug Barton wrote: > Greg Lehey wrote: >> grog 2007-05-20 03:31:52 UTC >> >> FreeBSD src repository >> >> Modified files: >> etc services >> Log: >> Bring the well known ports of /etc/services into sync with the IANA >> list. >> >> This is only for the well known known ports (port 1-1023) for tcp and >> udp only. >> >> Changes: >> - Removed "problems" comments around port 57, 77 and 87 >> - Removed audionews (port 114) >> - Added imap3 (port 220) >> - Removed yak-chat (port 258) >> - Removed concert (port 786) >> - Added a lot of new allocations > > In the past we've avoided adding entries to /etc/services that were > not actually being used by something we care about since every extra > entry increases response time for getservby*() calls. Understood. It's a factor I thought about. > Do we feel this is no longer a factor worth worrying about? It's certainly worth worrying about, and I thought about it before committing. My thoughts: - Clearly a lot of this stuff was just corrections. - We don't know in advance which IP ports are used by ports from the Ports Collection. - Maybe the performance issue isn't that serious after all. To quote from services(5): BUGS A name server should be used instead of a static file. I was just thinking that it might be relatively simple to build a "compiled" file in tabular format and then mmap it. That should be relatively simple, and should greatly improve performance modulo mmap overhead. How does the mmap overhead compare with querying a name server? Greg -- See complete headers for address and phone numbers. --KIzF6Cje4W/osXrF Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (FreeBSD) iD8DBQFGT9SEIubykFB6QiMRAhoNAKCLzhGeVT2ohrjhwGH6AeEBeIQ3jwCgiPEv j5M33ghp1UK86ubWmiuXSi8= =nkad -----END PGP SIGNATURE----- --KIzF6Cje4W/osXrF--
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