[BUG/ISSUE] MAPL crashes on systems with >2.147 TB of memory

[LiamBindle]

I noticed some GCHPctm simulations are crashing on some nodes on compute1 with the following error

...
At line 548 of file /my-projects/sgv/line-3/GCHPctm/src/MAPL/MAPL_Base/MAPL_MemUtils.F90
Fortran runtime error: Integer overflow while reading item 1
...

The line where the overflow occurs is https://github.com/geoschem/MAPL/blob/10e7a0bc8d0d79eb90a3742980fa6f7f073a87e3/MAPL_Base/MAPL_MemUtils.F90#L548 because memtot is a 32-bit signed integer, and this is happening on nodes that report >3TB of memory in /proc/meminfo.

Changing memtot to a 64-bit integer should fix this. I'll do this when I get a chance

[LiamBindle]

On LSF you can deny-list hosts with >2TB of memory like so

#BSUB -R "select[mem < 2000000]"

to prevent your job from landing on hosts with too much memory

[LiamBindle]

I'll follow up with a PR for this shortly. It's trivial.

[LiamBindle]

Hopefully fixed in GEOS-ESM/MAPL#591