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-rw-r--r--Documentation/filesystems/ocfs2.txt16
1 files changed, 15 insertions, 1 deletions
diff --git a/Documentation/filesystems/ocfs2.txt b/Documentation/filesystems/ocfs2.txt
index ed55238023a9..c318a8bbb1ef 100644
--- a/Documentation/filesystems/ocfs2.txt
+++ b/Documentation/filesystems/ocfs2.txt
@@ -35,7 +35,6 @@ Features which OCFS2 does not support yet:
- Directory change notification (F_NOTIFY)
- Distributed Caching (F_SETLEASE/F_GETLEASE/break_lease)
- POSIX ACLs
- - readpages / writepages (not user visible)
Mount options
=============
@@ -62,3 +61,18 @@ data=writeback Data ordering is not preserved, data may be written
preferred_slot=0(*) During mount, try to use this filesystem slot first. If
it is in use by another node, the first empty one found
will be chosen. Invalid values will be ignored.
+commit=nrsec (*) Ocfs2 can be told to sync all its data and metadata
+ every 'nrsec' seconds. The default value is 5 seconds.
+ This means that if you lose your power, you will lose
+ as much as the latest 5 seconds of work (your
+ filesystem will not be damaged though, thanks to the
+ journaling). This default value (or any low value)
+ will hurt performance, but it's good for data-safety.
+ Setting it to 0 will have the same effect as leaving
+ it at the default (5 seconds).
+ Setting it to very large values will improve
+ performance.
+localalloc=8(*) Allows custom localalloc size in MB. If the value is too
+ large, the fs will silently revert it to the default.
+ Localalloc is not enabled for local mounts.
+localflocks This disables cluster aware flock.