diff options
Diffstat (limited to 'content.tex')
| -rw-r--r-- | content.tex | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/content.tex b/content.tex index 2adeb62..47f0ef5 100644 --- a/content.tex +++ b/content.tex @@ -3983,7 +3983,9 @@ struct virtio_blk_discard_write_zeroes { \field{sector} indicates the starting offset (in 512-byte units) of the segment, while \field{num_sectors} indicates the number of sectors in each -discarded range. \field{unmap} is only used for write zeroes command. +discarded range. \field{unmap} is only used in write zeroes commands and allows +the device to discard the specified range, provided that following reads return +zeroes. The final \field{status} byte is written by the device: either VIRTIO_BLK_S_OK for success, VIRTIO_BLK_S_IOERR for device or driver |