On Wed, 2017-04-05 at 07:41 -0400, Martin K. Petersen wrote: > Separating discards and zeroout operations allows us to remove the LBPRZ > block zeroing constraints from discards and honor the device preferences > for UNMAP commands. > > If supported by the device, we'll also choose UNMAP over one of the > WRITE SAME variants for discards. Reviewed-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>