Your message dated Sat, 13 Dec 2025 17:52:44 +0000
with message-id <[email protected]>
and subject line Bug#1094805: fixed in openmpi 5.0.9-2
has caused the Debian Bug report #1094805,
regarding openmpi: Consider re-enabling UCX in openmpi-mca-params.conf
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
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misconfiguration somewhere. Please contact [email protected]
immediately.)
--
1094805: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1094805
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Source: openmpi
Version: 5.0.6-3
Dear Maintainer,
UCX is disabled in /etc/openmpi/openmpi-mca-params.conf by
no-warning-unused.patch:
https://sources.debian.org/src/openmpi/5.0.6-3/debian/patches/no-warning-unused.patch/
with the motivation to silence warnings when RDMA devices are not available:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=980033
https://github.com/open-mpi/ompi/issues/8367
Could UCX be re-enabled? I believe recent versions should no longer produce
these messages.
Re-enabling would also restore OpenMPI's default behavior of selecting UCX
for Infiniband-enabled systems. At the moment, OpenMPI is falling back to
ob1 for Infiniband communication, which has been significantly less
performant in our testing.
To enable UCX, we're adjusting /etc/openmpi/openmpi-mca-params.conf from:
mtl = ^ofi
btl = ^uct,openib,ofi
pml = ^ucx
osc = ^ucx,pt2pt
to:
mtl = ^ofi
btl = ^openib,ofi
osc = ^pt2pt
I couldn't comment on openfabric/openib.
-- System Information:
Debian Release: trixie/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 6.11.7-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8),
LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
--- End Message ---
--- Begin Message ---
Source: openmpi
Source-Version: 5.0.9-2
Done: Alastair McKinstry <[email protected]>
We believe that the bug you reported is fixed in the latest version of
openmpi, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Alastair McKinstry <[email protected]> (supplier of updated openmpi package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Sat, 13 Dec 2025 14:49:55 +0000
Source: openmpi
Binary: libopenmpi-dev libopenmpi40 libopenmpi40-dbgsym openmpi-bin
openmpi-bin-dbgsym openmpi-common openmpi-doc
Architecture: source arm64 all
Version: 5.0.9-2
Distribution: experimental
Urgency: medium
Maintainer: Debian Science Maintainers
<[email protected]>
Changed-By: Alastair McKinstry <[email protected]>
Description:
libopenmpi-dev - high performance message passing library -- header files
libopenmpi40 - high performance message passing library -- shared library
openmpi-bin - high performance message passing library -- binaries
openmpi-common - high performance message passing library -- common files
openmpi-doc - high performance message passing library -- man pages
Closes: 910251 983600 1094805 1101509 1118105 1120217
Changes:
openmpi (5.0.9-2) experimental; urgency=medium
.
* Drop MA:foreign from openmpi-bin (#1057727)
* Ditto dropping MA: same from libopenmpi-dev. Closes: #983600
* Drop obsolete breaks/replaces/conflicts
* Drop Spurious build-dep on libpsm-infinipath1-dev. Closes: #1101509
* Add salsa-ci.yml to enable CI automatically
* Close previously fixed bug: Closes: #910251
* Updated build_hurd patch from Drew Parsons. Closes: #1120217
* B-D on sphinx-common for dh_sphinxdoc
* d/watch now at version 4
* Re-enable UCX by default in openmpi-mca-params.conf.
Closes: #1094805
* openmpi-bin.postinst/prerm: delete obsolete conffiles
* Enable ucx for loong64. Closes: #1118105
* openmpi-doc: dep on node-mathjax-full for tex-mml-chtml.js
* privacy-mathjax.patch: Use local files not web
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