> On 23 Sep 2016, at 22:21, Wouter Verhelst <w...@uter.be> wrote: > > On Fri, Sep 23, 2016 at 02:00:06PM -0500, Eric Blake wrote: >> My preference would be a new flag to the existing commands, with >> explicit documentation that 0 offset and 0 length must be used with that >> flag, when requesting a full-device wipe. > > Alternatively, what about a flag that says "if you use this flag, the > size should be left-shifted by X bits before processing"? That allows > you to do TRIM or WRITE_ZEROES on much larger chunks, without being > limited to "whole disk" commands. We should probably make it an illegal > flag for any command that actually sends data over the wire, though.
I'd prefer an approach like this. Perhaps X could be negotiated with the block size extension (or simply be defined as the 'preferred block size'. This could then be defined to work with all commands. -- Alex Bligh
