Re: [PATCH 14/15] libnvdimm: support read-only btt backing devices

From: Christoph Hellwig
Date: Mon Jun 22 2015 - 12:32:36 EST

On Mon, Jun 22, 2015 at 12:00:54PM -0400, Jeff Moyer wrote:
> Right now, the guidance should be to always use btt since there are no
> applications that are directly taking advantage of persistent memory
> (that I know). I expect documentation would take care of that. I also
> expect that, as applications add support, they would note the
> requirement for dax mountpoints in their documentation.

It's not just DAX. Avoiding the overhead for anything else is
another good reason.
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