Date: Wed, 23 Jan 2019 23:16:43 +0100 From: Michael Tuexen <michael.tuexen@lurchi.franken.de> To: Freddie Cash <fjwcash@gmail.com> Cc: "Scheffenegger, Richard" <Richard.Scheffenegger@netapp.com>, "freebsd-transport@freebsd.org" <freebsd-transport@freebsd.org>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: RFC8312 Cubic Message-ID: <DC14EBAB-61A1-4559-99D6-1C894E80956C@lurchi.franken.de> In-Reply-To: <CAOjFWZ5khCCW2PUFqLceJF%2BPm1FxPOwTHasKogUtYBkXB2JUxA@mail.gmail.com> References: <SN4PR0601MB3728AC1A0E08DEF47B0EA3C686990@SN4PR0601MB3728.namprd06.prod.outlook.com> <CAOjFWZ5khCCW2PUFqLceJF%2BPm1FxPOwTHasKogUtYBkXB2JUxA@mail.gmail.com>
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> On 23. Jan 2019, at 21:41, Freddie Cash <fjwcash@gmail.com> wrote: >=20 > On Wed, Jan 23, 2019 at 12:34 PM Scheffenegger, Richard < > Richard.Scheffenegger@netapp.com> wrote: >=20 >> Hi, >>=20 >> we encounted an issue with the BSD11 cubic implementation during = testing, >> when dealing with app-stalled and app-limited traffic patterns. >>=20 >> The gist is, that at least in the after_idle cong_func for cubic, the >> states for ssthresh and cubic epoch time are not reset, leading to >> excessive cwnd values (overflows even) and self-inflicted drops due = to >> dramatic burst transmissions. >>=20 >> Bug Report, or Patch directly to Phabricator (when it is fully = qualified)? >>=20 >=20 > Search the freebsd-stable mailing list archives for the thread with = subject > line: >=20 > HEADS UP: TCP CUBIC Broken on 12.0-RELEASE/STABLE >=20 > = https://lists.freebsd.org/pipermail/freebsd-stable/2018-December/090255.ht= ml >=20 > An Errata Notice should be going out sometime this month-ish. Aren't you referring to: = https://www.freebsd.org/security/advisories/FreeBSD-EN-19:01.cc_cubic.asc Best regards Michael >=20 > --=20 > Freddie Cash > fjwcash@gmail.com > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
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