RE: remove exofs, the T10 OSD code and block/scsi bidi support V3

Elliott, Robert (Persistent Memory)
2018-12-20T21:33:00Z

> -----Original Message-----
> From: linux-kernel-owner@vger.kernel.org <linux-kernel-
> owner@vger.kernel.org> On Behalf Of Douglas Gilbert
> Sent: Wednesday, December 19, 2018 9:02 PM
> Subject: Re: remove exofs, the T10 OSD code and block/scsi bidi support V3
>
...
> While on the subject of bidi, the order of transfers: is the data-out
> (to the target) always before the data-in or is it the target device
> that decides (depending on the semantics of the command) who is first?

In SCSI, that was command-specific. Some necessitated intermixing the
transfers, while others did all one direction before all the other
direction.

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Robert Elliott, HPE Persistent Memory