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Date:      Thu, 04 Jan 2024 21:39:37 +0100
From:      "Herbert J. Skuhra" <herbert@gojira.at>
To:        tuexen@freebsd.org
Cc:        current@freebsd.org, net@freebsd.org
Subject:   Re: Request for Testing: TCP RACK
Message-ID:  <87jzoosuie.wl-herbert@gojira.at>
In-Reply-To: <99432C3E-6AD0-4B1B-9E50-C455D397861B@freebsd.org>
References:  <42C327BD-6CE4-43AA-A1AE-3BEC08D623DB@freebsd.org> <87pm09ykb8.wl-herbert@gojira.at> <87o7ftyhkp.wl-herbert@gojira.at> <CA%2Bq%2BTcoU21yisYDuCkYtAkJE-WXLdtohZi893zMP%2BNMG0WUh3Q@mail.gmail.com> <87msvdy0v4.wl-herbert@gojira.at> <867DC224-F0B1-4C9C-8EB7-C9F7BE1C029A@freebsd.org> <87edgo33s9.wl-herbert@gojira.at> <87o7e1s7oc.wl-herbert@gojira.at> <87le95rnp8.wl-herbert@gojira.at> <99432C3E-6AD0-4B1B-9E50-C455D397861B@freebsd.org>

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On Thu, 04 Jan 2024 21:22:22 +0100, tuexen@freebsd.org wrote:
>=20
> > On Jan 4, 2024, at 18:52, Herbert J. Skuhra <herbert@gojira.at> wrote:
> >=20
> > On Thu, 04 Jan 2024 11:40:35 +0100, "Herbert J. Skuhra" wrote:
> >>=20
> >> On Fri, 17 Nov 2023 14:31:02 +0100, "Herbert J. Skuhra" wrote:
> >>>=20
> >>> Hi,
> >>>=20
> >>> On Fri, 17 Nov 2023 00:15:13 +0100, tuexen@freebsd.org wrote:
> >>>>=20
> >>>>> On Nov 16, 2023, at 20:06, Herbert J. Skuhra <herbert@gojira.at> wr=
ote:
> >>>>>=20
> >>>>> On Thu, 16 Nov 2023 19:07:29 +0100, Olivier Cochard-Labb=C3=A9 wrot=
e:
> >>>>>>=20
> >>>>>> On Thu, Nov 16, 2023 at 5:10=E2=80=AFPM Herbert J. Skuhra <herbert=
@gojira.at> wrote:
> >>>>>>=20
> >>>>>>>=20
> >>>>>>> OK, I am now running GENERIC-NODEBUG + "options TCPHPTS".
> >>>>>>>=20
> >>>>>>> After setting "sysctl net.inet.tcp.functions_default=3Drack" git =
no
> >>>>>>> longer works:
> >>>>>>>=20
> >>>>>>>=20
> >>>>>> Are you using a fresh 15 head or a specific network setup ?
> >>>>>>=20
> >>>>>> Because I'm not able to reproduce your problem on my system:
> >>>>>>=20
> >>>>>> $ uname -a
> >>>>>> FreeBSD bigone 15.0-CURRENT FreeBSD 15.0-CURRENT #0
> >>>>>> main-n266452-070d9e3540e6: Thu Nov 16 17:53:15 CET 2023
> >>>>>> root@bigone:/usr/obj/usr/src/amd64.amd64/sys/TCPHPTS
> >>>>>> amd64
> >>>>>> $ cat /usr/src/sys/amd64/conf/TCPHPTS
> >>>>>> include GENERIC-NODEBUG
> >>>>>> ident                   TCPHPTS
> >>>>>> options                 TCPHPTS
> >>>>>> $ sysctl net.inet.tcp.functions_default
> >>>>>> net.inet.tcp.functions_default: rack
> >>>>>> $ git clone -q git@github.com:freebsd/freebsd-src.git && echo work=
ing
> >>>>>> working
> >>>>>> $
> >>>>>=20
> >>>>> OK, (g)it works if I disable pf. Do you use pf?
> >>>> Can you share your pf config such that I can reproduce the problem l=
ocally?
> >>>=20
> >>> 1. It even fails with a simple pf.conf:
> >>>  pass in all
> >>>  pass out all
> >>>=20
> >>> 2. Fetching port distfiles also failed.
> >>>=20
> >>> 3. If I disable rxcsum on the ethernet adapter (igb0) it works.
> >>=20
> >> Disabling lro also resolves the issue.
> >=20
> > If I run "sysctl net.inet.tcp.rack.features.cmpack=3D0" I don't have to
> > disable rxcsum/tcxsum or lro on igb0.
> Does the problem also goes away if you disable pf completely, but keep
> compressed acks enabled?

Yes, it works with pf disabled and compressed acks enabled.

--
Herbert



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