Re: [RFC PATCH v1 0/6] use mm to manage NVDIMM (pmem) zone

[Dan Williams]

On Mon, May 7, 2018 at 12:28 PM, Jeff Moyer <jmoyer@xxxxxxxxxx> wrote:
> Dan Williams <dan.j.williams@xxxxxxxxx> writes:
[..]
>>> What's the use case?
>>
>> Use NVDIMMs as System-RAM given their potentially higher capacity than
>> DDR. The expectation in that case is that data is forfeit (not
>> persisted) after a crash. Any persistent use case would need to go
>> through the pmem driver, filesystem-dax or device-dax.
>
> OK, but that sounds different from what was being proposed, here.  I'll
> quote from above:
>
>>>>>> But for the critical pages, which we hope them could be recovered
>                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>>>>> from power fail or system crash, we make them to be persistent by
>       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>>>>> storing them to NVM zone.
>
> Hence my confusion.

Yes, now mine too, I overlooked that.