Christoph,
> For block devices the target code implements UNMAP as calls to > blkdev_issue_discard, which does not guarantee zeroing just because > Write Zeroes is supported. > > Note that this does not affect the file backed path which uses > fallocate to punch holes. Reviewed-by: Martin K. Petersen <martin.peter...@oracle.com> -- Martin K. Petersen Oracle Linux Engineering
