/dev/pmem0 does not report written blocks while used as FS DAX backend

Solution Unverified - Updated -

Issue

  • While using /dev/pmem devices as backend for DAX filesystem the /proc/diskstats are not updated with written/read data. Due to this the devices do not appear in iostats report.

Environment

  • Red Hat Enterprise Linux 8
    • Observed on kernel-4.18.0-60.el8.x86_64

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