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authorLiu Bo <bo.li.liu@oracle.com>2014-07-17 18:46:01 +0800
committerDavid Sterba <dsterba@suse.cz>2014-08-22 15:07:02 +0200
commitb2d0e10d491f447cd2888e4af44fad9d442e524d (patch)
treeb7f9df2b28f88323489b86b08448239b32b4a26d
parentf1672e50c7f73cbdb1d9817e126c41a3db6d93ce (diff)
Btrfs-progs: fix wrong manpage of defrag command
'btrfs filesystem defrag' has an option '-t', whose manpage says "Any extent bigger than threshold given by -t option, will be considered already defragged. Use 0 to take the kernel default, and use 1 to say every single extent must be rewritten." Here 'use 0' still works, it refers to the default value(256K), however, 'use 1' is an obvious typo, it should be -1, which means the largest value it can be. Right now, we use parse_size() which no more allow value '-1', so in order to keep the manpage correct, this updates it to only keep value '0'. If you want to make sure every single extent is rewritten, please use a fairly large size, say 1G. Reported-by: Sebastian Ochmann <ochmann@informatik.uni-bonn.de> Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: David Sterba <dsterba@suse.cz>
-rw-r--r--Documentation/btrfs-filesystem.txt3
1 files changed, 1 insertions, 2 deletions
diff --git a/Documentation/btrfs-filesystem.txt b/Documentation/btrfs-filesystem.txt
index 0ee79cba..c9c0b006 100644
--- a/Documentation/btrfs-filesystem.txt
+++ b/Documentation/btrfs-filesystem.txt
@@ -41,8 +41,7 @@ The start position and the number of bytes to defragment can be specified by
start and len using '-s' and '-l' options below.
Any extent bigger than threshold given by '-t' option, will be considered
already defragged.
-Use 0 to take the kernel default, and use 1 to
-say every single extent must be rewritten.
+Use 0 to take the kernel default.
You can also turn on compression in defragment operations.
+
`Options`