Re: Snapshot target and DAX-capable devices

Mikulas Patocka
2018-08-30T19:47:37Z

On Thu, 30 Aug 2018, Jeff Moyer wrote:

> Mike Snitzer <snitzer@redhat.com> writes:
>
> > Until we properly add DAX support to dm-snapshot I'm afraid we really do
> > need to tolerate this "regression". Since reality is the original
> > support for snapshot of a DAX DM device never worked in a robust way.
>
> Agreed.
>
> -Jeff

You can't support dax on snapshot - if someone maps a block and the block
needs to be moved, then what?

Mikulas