I'm testing pmem performance using SPDK (to use ioat). spdk_mem_register returned
error on mmap-ed 1G aligned devdax device (Either 2M hugepages or 1G hugepages failed). It
trace the problem, and found vtophys_get_paddr_memseg(at
) returned error. I
also tried 2M alignment, it worked fine on both hugepage sizes.
What can be the cause of this problem?