Re: [PATCH v7 0/5] Introduce provisioning primitives

Martin K. Petersen
2023-06-08T02:04:15Z

Dave,

> Possibly unintentionally, I didn't call it REQ_OP_PROVISION but that's
> what I intended - the operation does not contain data at all. It's an
> operation like REQ_OP_DISCARD or REQ_OP_WRITE_ZEROS - it contains a
> range of sectors that need to be provisioned (or discarded), and
> nothing else.

Yep. That's also how SCSI defines it. The act of provisioning a block
range is done through an UNMAP command using a special flag. All it does
is pin down those LBAs so future writes to them won't result in ENOSPC.

--
Martin K. Petersen Oracle Linux Engineering