[dm-devel] [PATCH] vmalloc: introduce vmap_pfn for persistent memory

[Mikulas Patocka]

On Wed, 8 Nov 2017, Dan Williams wrote:

> On Wed, Nov 8, 2017 at 7:35 AM, Christoph Hellwig <hch at infradead.org> wrote:
> > On Wed, Nov 08, 2017 at 10:21:38AM -0500, Mikulas Patocka wrote:
> >> > And what do you do for an architecture with virtuall indexed caches?
> >>
> >> Persistent memory is not supported on such architectures - it is only
> >> supported on x86-64 and arm64.
> >
> > For now.  But once support is added your driver will just corrupt data
> > unless you have the right API in place.
> 
> I'm also in the process of ripping out page-less dax support. With
> pages we can potentially leverage the VIVT-cache support in some
> architectures, likely with more supporting infrastructure for
> dax_flush().

Should I remove all the code for page-less persistent memory from my 
driver?

Mikulas