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Date:      Sat, 24 Feb 2018 12:24:45 -0700
From:      Warner Losh <imp@bsdimp.com>
To:        "Conrad E. Meyer" <cem@freebsd.org>
Cc:        Eitan Adler <lists@eitanadler.com>, FreeBSD Hackers <freebsd-hackers@freebsd.org>,  FreeBSD Standards <freebsd-standards@freebsd.org>
Subject:   Re: Marking select(2) as restrict
Message-ID:  <CANCZdfpmB2KEfORKhsC9=AK0KP2z2_A=LC0YeZrFZv-8MEgT=g@mail.gmail.com>
In-Reply-To: <CAG6CVpV-YBfGsh5zDRuB7N43N4FW5X69BDyi_XF21fs7tOr5JQ@mail.gmail.com>
References:  <20180221032247.GA81670@ns.kevlo.org> <CAF6rxg=WwqeBnmJzfOZgtwrYesXPfvJFeaVmQwtTa_89_sxaJg@mail.gmail.com> <CANCZdfo46bhfaRpbqOmJjk4%2B=1R2c5kvmrJPENaxNgK==5M4kg@mail.gmail.com> <CAF6rxg=wNVgDUF9o744ngmzPNeHB3hqdrLufy=yS3D4osczxFQ@mail.gmail.com> <20180221104400.GU94212@kib.kiev.ua> <23181.46427.671514.319710@khavrinen.csail.mit.edu> <20180221185920.GA94212@kib.kiev.ua> <23181.50488.186767.579361@khavrinen.csail.mit.edu> <20180221201002.GC94212@kib.kiev.ua> <23181.54825.511195.393054@khavrinen.csail.mit.edu> <20180222212746.GB58772@stack.nl> <CAF6rxgkW=Fgh4%2B1-aJG=VUCYso9gcKnER17UOiBy8GtTMsJNYQ@mail.gmail.com> <CAF6rxg=-nBz8caa1Wn1Labn3DydpEO6B8W9PaLhNKYFwGvuZxw@mail.gmail.com> <CAG6CVpV-YBfGsh5zDRuB7N43N4FW5X69BDyi_XF21fs7tOr5JQ@mail.gmail.com>

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On Sat, Feb 24, 2018 at 11:55 AM, Conrad Meyer <cem@freebsd.org> wrote:

> On Sat, Feb 24, 2018 at 10:35 AM, Eitan Adler <lists@eitanadler.com>
> wrote:
> > After this entire thread here is the summary. If I've misrepresented
> > you here please let me know.
> > ...
> >
> > kib@ - no benefit; concerned fallout could be hard to observe
> > cem@ - concerned about warnings
>
> Consider me a +1 to kib@.  I did not voice those concerns explicitly
> in earlier email because kib did already and I didn't anticipate you
> would ignore him.


So there's no benefit to the change (we won't optimize better). It's hard
to observe breakage. No answer about how we'd even know if something broke
because a exp run sure as hell isn't going to tell us.

All that militates against the change rather strongly. Your exp run will
change no minds because it is useless.

Warner



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