Date: Tue, 13 Jan 2015 10:32:29 -0500 From: Pedro Giffuni <pfg@FreeBSD.org> To: Midori Kato <aoimidori27@gmail.com> Cc: svn-src-head@freebsd.org, Lars Eggert <lars@netapp.com>, Hiren Panchasara <hiren@freebsd.org> Subject: Re: svn commit: r277054 - in head: share/man/man4 sys/modules/cc sys/modules/cc/cc_dctcp sys/netinet sys/netinet/cc Message-ID: <54B53A8D.4050000@FreeBSD.org> In-Reply-To: <CAMas6sO1bwONayhSvQYFPS5hVEqjdiVnxeJwfaBP2iR-4LkHZw@mail.gmail.com> References: <201501120833.t0C8X53s071470@svn.freebsd.org> <54B3F10F.70506@FreeBSD.org> <CAMas6sO1bwONayhSvQYFPS5hVEqjdiVnxeJwfaBP2iR-4LkHZw@mail.gmail.com>
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Midori-san; I am aware of the patent issue as we spoke about it with George (gnn@) at BSDCan. It's not really an issue for us, and if you find more patent under the same free-use conditions, feel free to send patches :). The linux guys are aware of the patent but I agree that the issues linux might have are none of our business. Thank you all involved in the DCTCP implementation: it's great to see FreeBSD's networking implementation getting better! Best regards, Pedro. On 01/13/15 06:49, Midori Kato wrote: > Hi Pedro, > > Thank you for your mention about the patent problem. > Thanks to Hiren and Lars support, we have already discuss patent with > microsoft people. But I am not sure that we must care about Linux > because we worked on our implementation without linux. Let's wait and > see if redhat people say about it. > > Again, thank you for your interest to dctcp implementation :) > > Regards, > -- Midori > > > 2015-01-13 1:06 GMT+09:00 Pedro Giffuni <pfg@freebsd.org > <mailto:pfg@freebsd.org>>: > > > On 12/01/2015 03:33 a.m., Hiren Panchasara wrote: > > Author: hiren > Date: Mon Jan 12 08:33:04 2015 > New Revision: 277054 > URL: https://svnweb.freebsd.org/changeset/base/277054 > > Log: > DCTCP (Data Center TCP) implementation. > DCTCP congestion control algorithm aims to maximise > throughput and minimise > latency in data center networks by utilising the proportion > of Explicit > Congestion Notification (ECN) marked packets received from > capable hardware as a > congestion signal. > Highlights: > Implemented as a mod_cc(4) module. > ECN (Explicit congestion notification) processing is done > differently from > RFC3168. > Takes one-sided DCTCP into consideration where only one of > the sides is using > DCTCP and other is using standard ECN. > IETF draft: > http://tools.ietf.org/html/draft-bensley-tcpm-dctcp-00 > Thesis report by Midori Kato: > https://eggert.org/students/kato-thesis.pdf > Submitted by: Midori Kato <katoon@sfc.wide.ad.jp > <mailto:katoon@sfc.wide.ad.jp>> and > Lars Eggert <lars@netapp.com > <mailto:lars@netapp.com>> > with help and modifications from > hiren > Differential Revision: https://reviews.freebsd.org/D604 > Reviewed by: gnn > > > Missing > > RelNotes= yes > > Huge thank you! > > FWIW, I thought the linux guys wouldn't take it over some GPL vs > patent issue but apparently redhat pushed some muscle and just did it: > > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e3118e8359bb7c59555aca60c725106e6d78c5ce > > Not that I care much what they do ;). > > Pedro. > >
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