Some support has been added to the Linux kernel like DAX [0] to avoid extra copy operations [0].

SNIA has some interesting talks regarding using non volatile memory and its applications (DBs). Where using pmem and DAX to directly to store logging operations [1].

[0] What is Direct-Access (DAX)? https://kb.pmem.io/faq/100000008-What-is-DAX/

[1] SDC2020: How can Persistent Memory Make Databases Faster, and How Could we go Ahead? https://www.youtube.com/watch?v=rTgITrVhpQM