Hi folks,

I learned in disappointment after becoming LuaJit uploader that
the LuaJit upstream behaves uncooperatively especially for IBM
architectures [1]. IIUC, the upstream has no intention to care
about IBM architectures (ppc64el, s390x).

The current ppc64el support on stable is done through cherry-picked
out-of-tree patch. And I learned that the patch is no longer
functional[2] for newer snapshots if we step away from that
ancient 2.1.0~beta3 release.

However, architectures like amd64 needs relatively newer version[3],
while IBM architecture still has demand luajit[4] (only the
ancient version will possibly work on IBM archs).

I'm looking for suggestions on what to do next:

option 1:
drop IBM architectures that the upstream cannot support
from src:luajit, and provide archs like amd64 with relatively
newer snapshot versions[5].
and package reliable alternatives (if any) for IBM archs.
option 2:
use latest source for amd64 architecture, and rollback the
source specifically for IBM architectures to keep it
functional.
option 3:
rollback to the ancient stable release and screw it
option 4:
...

Thanks.

[1] https://github.com/LuaJIT/LuaJIT/pull/140
[2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1004511
[3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=981808
[4] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1008858
[5] Yes ... the upstream do not release anymore.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Hi!

On 5/12/22 03:29, M. Zhou wrote:

I learned in disappointment after becoming LuaJit uploader that
the LuaJit upstream behaves uncooperatively especially for IBM
architectures [1]. IIUC, the upstream has no intention to care
about IBM architectures (ppc64el, s390x).

The current ppc64el support on stable is done through cherry-picked out-of-tree patch. And I learned that the patch is no longer
functional[2] for newer snapshots if we step away from that
ancient 2.1.0~beta3 release.

However, architectures like amd64 needs relatively newer version[3],
while IBM architecture still has demand luajit[4] (only the
ancient version will possibly work on IBM archs).

I saw that Matej Cepl was replying in the thread who is a colleague of
mine and who is the maintainer of the luajit package in openSUSE/SLE.

Since SUSE has a commercial interest in working POWER/S390 support, he
takes care of the package and makes sure it keeps working on these architectures.

My suggestion would be to just pick the packages from openSUSE [1]
since they are kept up-to-date.

Adrian

[1] https://build.opensuse.org/package/show/devel:languages:lua/luajit

--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer
`. `' Physicist
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913

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--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Hi Dipack,

I filed an ITP bug for luajit2 and will look into it.
Thank you!

On Mon, 2022-05-16 at 16:22 +0000, Dipak Zope1 wrote:

Hello all,
It'd be better to switch to luajit2 if it is possible. We can see
right now the main issue with luajit project is no response from
upstream of LuaJIT to previous merge request attempts. And luajit2
already contains almost everything needed for s390x support.
 
Thanks,
-Dipak
 

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

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--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

To: lumin@debian.org (M. Zhou)
Copy: debian-devel@lists.debian.org (debian-devel)

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--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

From the buildlogs / testlogs / local tests (ppc64el qemu), it seems that there is completely no improvement for ppc64el. Simple scripts can still encounter segmentation faults (e.g., autopkgtest for src:lua-moses).

s390x is newly enabled. I still have not seen enough test log to give
any preliminary conclusion.


On Thu, 2022-06-09 at 16:19 +0200, Frédéric Bonnard wrote:

Hi Mo, Paul,
did you see any improvement with luajit2 ?
I was looking at luakit, which still fails "silently" on ppc64el, a lua script generating a .h with no symbols with luajit2, where it does work
with lua.
Also I see that the autopkgtest of knot-resolver still fails on
ppc64el.

F.

On Thu, 19 May 2022 22:14:01 -0400 "M. Zhou" <lumin@debian.org> wrote:

On Thu, 2022-05-19 at 16:30 +0200, Frédéric Bonnard wrote:

Hi,

I've followed luajit closely since 2015 on ppc64el as a porter
without enough knowledge to port it, but trying to ease on the packaging/Debian side (being both IBMer/DD).
That port has been a mixed effort between a code bounty and an IBM
effort (some devs) .
It didn't started well ( https://www.freelists.org/post/luajit/PPC64le-port-status,1 )
and it has never grown and be really part of the upstream project
sadly.

With the years, I'm even less optimistic as no IBM nor external
developer seem to be working on that. Mike Pall seems to be around
though as you said there's no release (not necessarily a bad sign).
I can ping inside IBM but I'm not sure there will be any positive feedback.

So I'd say we have no choice, i.e. let's drop IBM arches .
What I did a few times for packages depending on libluajit was to use liblua instead :
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=892765

Thanks,
F.

Nobody want to spend time on an bottomless hole ...
I'll simply remove ppc64el architecture support from src:luajit,
and give src:luajit2 (openresty) a try.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)