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authorQu Wenruo <quwenruo@cn.fujitsu.com>2014-01-06 09:58:31 +0800
committerChris Mason <clm@fb.com>2014-01-28 13:20:19 -0800
commita258af7a3e395a1d36190c81614dca0bcb5f6012 (patch)
treebd04146ab46bd470efbc4728cd0e9c4b7b472157 /Documentation/filesystems
parentbd0330ad2174d1a5f762eee2ee58f0148f10d575 (diff)
downloadop-kernel-dev-a258af7a3e395a1d36190c81614dca0bcb5f6012.zip
op-kernel-dev-a258af7a3e395a1d36190c81614dca0bcb5f6012.tar.gz
btrfs: Add datacow mount option.
Add datacow mount option to enable copy-on-write with remount option. Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r--Documentation/filesystems/btrfs.txt5
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/filesystems/btrfs.txt b/Documentation/filesystems/btrfs.txt
index 79c08f3..bbd1f0f 100644
--- a/Documentation/filesystems/btrfs.txt
+++ b/Documentation/filesystems/btrfs.txt
@@ -154,9 +154,10 @@ Options with (*) are default options and will not show in the mount options.
(non-battery-backed) write-back cache, nobarrier option will lead to
filesystem corruption on a system crash or power loss.
+ datacow(*)
nodatacow
- Disable data copy-on-write for newly created files. Implies nodatasum,
- and disables all compression.
+ Enable/disable data copy-on-write for newly created files.
+ Nodatacow implies nodatasum, and disables all compression.
nodatasum
Disable data checksumming for newly created files.
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