The configuration guidance for nvdimm indicates that fsdax mode requires 64 byte of metadata per 4K bytes of nvdimm. The map= command line argument can be used to control whether that metadata is stored in the nvdimm or regular (presumably DRAM) memory. We were pondering this as wonder what the metadata is used for. I am thinking someone on this list can clarify. Thanks!
Eliot Moss PS: Concerning that huge pages mapping question from a while back, is there an fsdax group / list to which I could post that for followup? Thanks - EM
