This functions is called after an previous calls to WB_NMTReserveMemory and WB_NMTAttemptReserveMemoryAt, which both already registered an NMT tag. So, explicitly recording an NMT tag for this memory is redundant and slightly confusing.

The HotSpot JVM code does not record NMT tags when committing memory (except in a special case on Windows when mapping file memory).