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Re: [dm-devel] Snapshot target and DAX-capable devices




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


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