Re: [PATCH 00/13] dax, pmem: move cpu cache maintenance to libnvdimm

[Christoph Hellwig]

On Sun, Jan 22, 2017 at 09:30:23AM -0800, Dan Williams wrote:
> So are you saying we need a way to go from a block_device inode to a
> dax_device inode and then look up the dax_operations from there?
> 
> A filesystem, if it so chooses, could mount on top of the dax_device
> inode directly?

Sentence 1: maybe if we have to.  Sentence 2: absolutely.

> I did add a dax_superblock for the device-dax character device
> representation I could refactor that so the block_device presentation
> of a namespace and a character device presentation are just different
> layers on top of the base-level dax inode.

That's a good start.