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Diffstat (limited to 'Documentation/mkfs.btrfs.asciidoc')
| -rw-r--r-- | Documentation/mkfs.btrfs.asciidoc | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/Documentation/mkfs.btrfs.asciidoc b/Documentation/mkfs.btrfs.asciidoc index f69c529d..2a1c3592 100644 --- a/Documentation/mkfs.btrfs.asciidoc +++ b/Documentation/mkfs.btrfs.asciidoc @@ -100,7 +100,21 @@ Please see the mount option 'discard' for that in `btrfs`(5). *-r|--rootdir <rootdir>*:: Populate the toplevel subvolume with files from 'rootdir'. This does not -require root permissions and does not mount the filesystem. +require root permissions to write the new files or to mount the filesystem. ++ +NOTE: This option may enlarge the image or file to ensure it's big enough to +contain the files from 'rootdir'. Since version 4.14.1 the filesystem size is +not minimized. Please see option '--shrink' if you need that functionality. + +*--shrink*:: +Shrink the filesystem to its minimal size, only works with '--rootdir' option. ++ +If the destination is a regular file, this option will also truncate the +file to the minimal size. Otherwise it will reduce the filesystem available +space. Extra space will not be usable unless the filesystem is mounted and +resized using 'btrfs filesystem resize'. ++ +NOTE: prior to version 4.14.1, the shrinking was done automatically. *-O|--features <feature1>[,<feature2>...]*:: A list of filesystem features turned on at mkfs time. Not all features are |