Re: [PATCH v2] virtio-blk: add DISCARD support to virtio-blk driver

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On 05/07/2017 09:57, Liu, Changpeng wrote:
>> Please include a patch for the specification.  Since we are at it, I
> Thanks Paolo, do you mean include a text file which describe the changes for the specification?

The specification is hosted in an svn (Subversion) repository at
https://tools.oasis-open.org/version-control/svn/virtio.  You can
provide a patch and send it to virtio-comment@xxxxxxxxxxxxxxxxxxxx.

Thanks,

Paolo

>> would like to have three operations defined using the same descriptor:
>>
>> - discard (SCSI UNMAP)
>>
>> - write zeroes (SCSI WRITE SAME without UNMAP flag)
>>
>> - write zeroes and possibly discard (SCSI WRITE SAME with UNMAP flag)
>>
>> The last two can use the same command VIRTIO_BLK_T_WRITE_ZEROES, using
>> the reserved field as a flags field.
>
> Will add write zeroes feature.
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