Re: [PATCH 0/7] s390/dasd: add hardware copy relation

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On 21.09.22 10:23, Stefan Haberland wrote:
> Am 21.09.22 um 09:07 schrieb Johannes Thumshirn:
>> On 20.09.22 21:26, Stefan Haberland wrote:
>>> Hi Jens,
>>>
>>> please apply the following patchset to for-next.
>>> It adds basic support for a harwdare based copy relation to the DASD
>>> device driver.
>> Hi Stefan,
>>
>> How's the relation of this patchset to the current efforts of getting a common
>> copy offload API (NVMe Simple Copy and SCSI XCOPY) into the block-layer?
>>
>>
>> Thanks,
>> 	Johannes
> 
> Hi Johannes,
> 
> there is no relation to this efforts.
> My patchset basically aims to add some support of IBMs 
> Peer-to-Peer-Remote-Copy (PPRC) hardware feature to the DASD device driver.
> PPRC is a protocol that might be used without any OS interaction on a 
> storage server level.
> This patchset allows the driver to recognize such devices correctly and 
> allows an user to make a copy relation known to the driver.
> In this case Linux is only an observer/user of the copy relation which 
> is set up by an external entity.

Thanks for the clarification.




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