I built 2 systems running identical software with these two modules:
Colibri iMX6ULL 512MB IT V1.0A
Colibri iMX6ULL 512MB IT V1.1A
On system #2 I get several messages like this:
alloc_contig_range: [980a0, 980b4] PFNs busy
When trying to store data in a file. The program does not crush, but the data is not stored.
The modules are of two different software versions, V1.0A and V1.1A, so I am thinking it is related to that, because it does not happen on system #1.