From owner-freebsd-stable@FreeBSD.ORG Tue Feb 28 23:08:18 2012 Return-Path: Delivered-To: stable@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D0552106564A; Tue, 28 Feb 2012 23:08:18 +0000 (UTC) (envelope-from flo@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 9839B8FC08; Tue, 28 Feb 2012 23:08:18 +0000 (UTC) Received: from nibbler-wlan.fritz.box (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.5/8.14.5) with ESMTP id q1SN8ELo040638; Tue, 28 Feb 2012 23:08:15 GMT (envelope-from flo@FreeBSD.org) Message-ID: <4F4D5E5D.9040302@FreeBSD.org> Date: Wed, 29 Feb 2012 00:08:13 +0100 From: Florian Smeets User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:11.0) Gecko/20120222 Thunderbird/11.0 MIME-Version: 1.0 To: Doug Barton References: <20120221143537.Horde.deyFDZjmRSRPQ52pxBIpnLA@webmail.leidinger.net> <4F4BA707.5070608@wasikowski.net> <4F4C3FE7.3040802@FreeBSD.org> <4F4D51CB.2010508@FreeBSD.org> In-Reply-To: <4F4D51CB.2010508@FreeBSD.org> X-Enigmail-Version: 1.4a1pre Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigFF6DB0873B17E8CFCEC0B443" Cc: stable@FreeBSD.org, current@FreeBSD.org, Steve Wills , =?UTF-8?B?eiBXxIVzaWtvd3NraQ==?= , Arnaud Lacombe , Alexander Leidinger , "Bjoern A. Zeeb" , =?UTF-8?B?xYF1a2Fz?= Subject: flowtable usable or not (was: Re: [CFT] modular kernel config X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Feb 2012 23:08:18 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigFF6DB0873B17E8CFCEC0B443 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 28.02.12 23:14, Doug Barton wrote: > On 2/28/2012 10:48 AM, Arnaud Lacombe wrote: >> You will sure go really far with this kind of "It is broken ? Let's >> not fix it and disable it instead" mentality, even more when coming >> from a committer. >> >> As long as there will be these kind of comments around here, FreeBSD >> will deserve nothing but to keep dying piece by piece, and it will be >> deserved. >=20 > In general, I tend to agree with you, but in this case it's useful to > know the history of the flowtable option. >=20 > 1. It was introduced in -current > 2. It received fairly good testing, was pronounced good and useful, and= > MFC'ed. > 3. Several releases happened with flowtable. > 4. Users started to report problems that were ultimately tracked down t= o > flowtable. > 5. Ultimately it was decided that flowtable was not a universal good. > 6. The developer of the option agreed that it should be disabled by > default until such time as it can be fixed. > 7. The fixing hasn't happened yet. >=20 I talked to Kip Macy, who implemented flowtable, about this. He thinks that the problem was caused by inappropriate default setting of net.inet.ip.output_flowtable_size. This should have been fixed by r205488 which was MFC'd to 8 and should be part of 8.2 and of course 9.0. However nobody who experienced the problem wanted to try any of these releases with flowtable enabled, so we still don't know if it's fixed or not. Should anyone try this it could certainly be the case that net.inet.ip.output_flowtable_size needs to be tuned even more. Florian --------------enigFF6DB0873B17E8CFCEC0B443 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iEYEARECAAYFAk9NXl4ACgkQapo8P8lCvwmVJACggwmUsmUEH8dfi/1tY+k3JGUu ATIAnR+lR8pRo+kQNGeXpX/mdmcHKS4C =+h1y -----END PGP SIGNATURE----- --------------enigFF6DB0873B17E8CFCEC0B443--