I need help with error:device does not support DAX.

[dangzzz]

I'm try to install NOVA in my VMware Workstation,and I try to emulate Persistent Memory using DRAM,followinghttps://software.intel.com/en-us/articles/how-to-emulate-persistent-memory-on-an-intel-architecture-server.

I use linux-nova-master and configure kernel with CONFIG_LIBNVDIMM=y, CONFIG_BLK_DEV_PMEM=y, CONFIG_FS_DAX=y and CONFIG_NOVA_FS=y.

I successfully saw pmem0 in /dev/,and I can mount it without DAX.
But when I run "mount -t NOVA -o init /dev/pmem0 /mnt/pmemdir",there is an error which is device does not support DAX.(when I use EXT4 with DAX,it said DAX unsupported by block device.)

I don't know how to solve it.Could you help me?
Thank you very much!

[Andiry]

Can you post your findings in case others encounter the same issue? Thanks.

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[TaehoHwang]

I saw the same message on real intel optane memory. After configuring pmem mode (from 'raw' to 'fsdax') with ndctl, the problem was resolved.