Re: [PATCH v4] scsi: support packing multi-segment in UNMAP command

[Martin K. Petersen]

Chao,

> As SCSI SBC4 specification section 5.30.2 describes that it can
> support unmapping one or more LBA range in single UNMAP command.
>
> However, previously we only pack one LBA range in UNMAP command by
> default no matter device gives the block limits that says it can
> support unmapping multiple LBA ranges with a single UNMAP command.
>
> This patch sets max_discard_segments config according to block limits
> of device, and supports unmapping multiple LBA ranges with a single
> UNMAP command.

This looks OK to me. Will test with a variety of targets.

-- 
Martin K. Petersen	Oracle Linux Engineering