Alexander Grund

> There is no `host` configuration anymore, everything that used to be `host` is now `exec`. However, as part of that change, `--distinct_host_configuration` went away, which is why you saw...

Yes I was the one. This time this is not that problem (did this properly using this files) So the problem still persists. Files are here: http://www63.zippyshare.com/v/86360739/file.html BTW: I tested...

As you can see I build with ucx and ofi. So OMPI can choose, I guess.

The reason we build with libfabric and UCX (as far as I remember) is that the compilation process should be universal so the built package can be used on different...

> @Flamefire OFI (with osc/rdma layer) is being selected by default since it has higher priority (=101) than osc/ucx (=70). > Can you please add also "-mca osc ucx" to...

@ggouaillardet So do I understand this correctly that a workaround would be to either exclude libfabric from the build or add a line `osc_rdma_priority=50` to `/etc/openmpi-mca-params.conf`?

> If you are using module files, export OMPI_MCA_osc_rdma_priority=50 is also an option. As EasyBuild creates module files this might indeed be an option. To make sure this works across...

> Which feels like an actual code issue, and I'm sorry I don't know how to solve that one. When you checkout different commits (e.g. when bisecting) you need to...

> Which commit specifically caused it to break? Would love to have a fix. That is the big question. @diwilli did you found anything by bisecting? @Ekliptor or who else...

@Ekliptor You can pass `-DRTTR_ENABLE_WERROR=OFF` to cmake to avoid having to modify the source for those warnings. That should make the bisecting easier.