I am new to the list and looks like I've got lucky timing. Penguin
Computing just got some NVDIMM's and a BIOS to support them in our
Tundra Relion 1930g system. (Haswell, DDR4, memory + flash + supercap,
I was able to compile and boot 4.0.0 and get the device detected as
persistent. Loaded pmem which took ownership of it. Made an XFS
filesystem on it and was able to read/write to it.
As mentioned in another thread, performance isn't anything to write
home about just yet, but I'm sure it will improve.
I've also got some BIOS bugs to fix which I'm working on separately.
I'll keep an eye out for benchmarks to run and patches to try.
My goal is to be able to use an NVDIMM as a ZFS ZIL or other
filesystem journal to accelerate filesystem performance. NVDIMM's are
architecturally identical to the ZeusRAM SCSI drive used by many to
accelerate ZFS performance. One would hope that we can get
performance to equal or exceed that device (a 6Gbps SAS drive).
Let me know how I can help.
Philip Pokorny, RHCE
Chief Technology Officer
PENGUIN COMPUTING, Inc
Changing the world through technical innovation