Date: Wed, 19 May 1999 09:04:05 +0100 From: Brian Somers <brian@Awfulhak.org> To: "Tim Pushor" <timp@orion.ab.ca> Cc: questions@FreeBSD.ORG Subject: Re: Number of TUN devices Message-ID: <199905190804.JAA01055@keep.lan.Awfulhak.org> In-Reply-To: Your message of "Tue, 18 May 1999 12:31:44 MDT." <003401bea15c$c0af4e10$1001a8c0@timmys.shl.com>
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> Hello, > > Does anyone know how man tun devices I can run in the 3.x kernels? I would > like to run LOTS (as many as possible), so even if I had to potentially > modify the kernel... I've got 300 configured on my development box, and I've tested the devices > minor 256 (to see that minor numbers with the ``hole'' work). Unfortunately, after running ppp a couple of hundred times, the machine was suffering a bit. I haven't tried this since I revised the setitimer() stuff in ppp though - so it may actually be plausible to run 200-300 ppps, especially if it's something like ppp over udp without compression as there are far fewer overheads. YMMV - especially with something like nos-tun(8). AFAIR, there was a problem in OpenBSD's version of config(8) that stopped ``pseudo-device tun 257'' from getting things right as it ended up overflowing the minor number and incrementing the major number :-( There may have been some minor (heh!) MAKEDEV problems too. I wouldn't be surprised if NetBSD suffered similar problems. > Thanks, > Tim PS, the output of ``netstat -i'' looks silly when you've got more than 100 devices :-/ -- Brian <brian@Awfulhak.org> <brian@FreeBSD.org> <http://www.Awfulhak.org> <brian@OpenBSD.org> Don't _EVER_ lose your sense of humour ! <brian@uk.FreeBSD.org> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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