Re: [PATCH 4/4] dax: "Hotplug" persistent memory for use like normal RAM

[Bjorn Helgaas]

On Wed, Jan 16, 2019 at 3:40 PM Dave Hansen <dave.hansen@xxxxxxxxx> wrote:
> On 1/16/19 1:16 PM, Bjorn Helgaas wrote:
> > On Wed, Jan 16, 2019 at 12:25 PM Dave Hansen
> > <dave.hansen@xxxxxxxxxxxxxxx> wrote:
> >> From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
> >> Currently, a persistent memory region is "owned" by a device driver,
> >> either the "Direct DAX" or "Filesystem DAX" drivers.  These drivers
> >> allow applications to explicitly use persistent memory, generally
> >> by being modified to use special, new libraries.
> >
> > Is there any documentation about exactly what persistent memory is?
> > In Documentation/, I see references to pstore and pmem, which sound
> > sort of similar, but maybe not quite the same?
>
> One instance of persistent memory is nonvolatile DIMMS.  They're
> described in great detail here: Documentation/nvdimm/nvdimm.txt

Thanks!  Some bread crumbs in the changelog to lead there would be great.

Bjorn