> -----Original Message----- > From: linux-kernel-ow...@vger.kernel.org <linux-kernel- > ow...@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. --- Robert Elliott, HPE Persistent Memory
