Re: [PATCH v15 09/12] dm: Add support for copy offload

[Hannes Reinecke]

On 9/6/23 18:38, Nitesh Shetty wrote:
> Before enabling copy for dm target, check if underlying devices and
> dm target support copy. Avoid split happening inside dm target.
> Fail early if the request needs split, currently splitting copy
> request is not supported.
And here is where I would have expected the emulation to take place;
didn't you have it in one of the earlier iterations?
After all, device-mapper already has the infrastructure for copying
data between devices, so adding a copy-offload emulation for 
device-mapper should be trivial.

Cheers,

Hannes
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