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Date:      Fri, 8 Jul 2022 08:58:28 +0200
From:      Sebastian Huber <sebastian.huber@embedded-brains.de>
To:        Warner Losh <imp@bsdimp.com>
Cc:        FreeBSD Hackers <freebsd-hackers@freebsd.org>
Subject:   Re: [PATCH 0/6] Simplify pps_capture() and pps_event()
Message-ID:  <5efeedf3-51dc-e186-48a4-c3dd14b7712e@embedded-brains.de>
In-Reply-To: <CANCZdfru6K7Z-TCvRk3YcSGrU6EWSD8Ottd6vDNhe_2jQEFsrg@mail.gmail.com>
References:  <20220707152506.55626-1-sebastian.huber@embedded-brains.de> <CANCZdfru6K7Z-TCvRk3YcSGrU6EWSD8Ottd6vDNhe_2jQEFsrg@mail.gmail.com>

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On 07.07.22 17:52, Warner Losh wrote:
> You might have better luck getting these patches reviewed with either a=
=20
> pull request against github
> mentioning the usual time people (phk, etc), or as a series=C2=A0of=20
> phabricator reviews adding said people.
> If unsure, mention/add me and I'll add others :).

Thanks for the hint. I opened a Github pull request:

https://github.com/freebsd/freebsd-src/pull/604

>=20
> Hackers is (or has been) a high enough volume list that this may not be=
=20
> noticed by those people,
> especially since there's not a strong tradition of reviewing patches he=
re.
>=20
> On their surface (without having had time to study them in depth), thes=
e=20
> seem reasonable improvements.
> But having some context about why you are making these, and/or=20
> measurements you've done to show no
> harm (or hopefully an improvement) would be even better. This is=20
> slightly tricky code that has had about 20
> years of "soak time" in some fairly demanding environments, and so some=
=20
> caution is advised in updating
> it.

I don't use FreeBSD directly. I use the FreeBSD timecounters in RTEMS.=20
We recently enabled the PPS_SYNC support and would like to use it for=20
the time synchronization on a spacecraft. For this we have to do a=20
specification and validation tests. This work increases with every "if"=20
in the code. I didn't test the patch on a real system so far (in fact,=20
patch 6 has a typo which was detected by the CI runner). We will=20
definitely do extensive testing when the hardware is available.

--=20
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