[Python-modules-team] Bug#818265: Bug#818187: Bug#818265: Bug#818187: zeromq3 migrated without any transition being done

[Luca Boccassi]

On Tue, 29 Nov 2016 22:10:47 +0100 Julian Taylor <jtaylor.debian at google
mail.com> wrote:
> On 29.11.2016 15:10, Tobias Hansen wrote:
> > On Thu, 3 Nov 2016 20:25:23 +0100 Julian Taylor
> > <jtaylor.debian at googlemail.com> wrote:
> >> On 03.11.2016 20:17, Sandro Tosi wrote:
> >>>> Looks like your last upload fixed the build on most
architectures. However the
> >>>> package still failed to build on arm64.
> >>>>
> >>>> https://buildd.debian.org/status/package.php?p=pyzmq
> >>>
> >>> Hey Julian, do you have time to look at the failures in the
> >>> https://buildd.debian.org/status/package.php?p=pyzmq ? it looks
like
> >>> upstream released 16.0.0 so it might worth a shot packaging it to
see
> >>> if that solves them. thanks!!
> >>>
> >>
> >> I have packaged it though the tests are also unreliable on x86,
still
> >> needs to be looked at.
> >>
> > 
> > Could it be that zeromq3 4.2.0 (which is now in unstable) helps?
> > 
> > It would be nice if this could be fixed before the soft freeze on
> > January 5. We are trying to get sagemath (currently not uploaded
yet) to
> > migrate to testing before that date and it could become a problem
to
> > have different versions of pyzmq (and zeromq3) in unstable and
testing.
> > 
> 
> 
> No luck still hangs sometimes and I still had no time to properly
look
> into it :/
> Also the decision to not provide aligned even 4 byte aligned payload
> buffers in zmq 4.2 as indicated in #844479 is going to be a minefield
in
> our arches without unaligned access ...

Hi,

Note that there's a new option in libzmq 4.2.5 (still in DRAFT so not
available without rebuilding for now) to disable the zero-copy receive
that was added in 4.2.0:

https://github.com/zeromq/libzmq/blob/master/doc/zmq_ctx_set.txt#L130

I'm not sure in which use case payloads would need to be aligned, but
for such programs you'll be able to set it - if you have already
encountered issues you can rebuild libzmq (or get the packages from our
OBS repos: https://software.opensuse.org/download.html?project=network%
3Amessaging%3Azeromq%3Arelease-draft&package=libzmq3-dev ) and try it
out.

-- 
Kind regards,
Luca Boccassi
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