[PATCH]ext4: add the spec for ext4 subdirectory limit(was: Problems with the max value for create directory)

[Zhang Xiliang <zhangxiliang@cn.fujitsu.com>]

ext4: add the spec for ext4 subdirectory limit

When the block size is 1024, users can't creat 32000 subdirectories for htree limit.
I think it should be added to ext4 document.

Signed-off-by: Zhang Xiliang <zhangxiliang@cn.fujitsu.com>
---
 Documentation/filesystems/ext4.txt |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index cec829b..df17557 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -85,7 +85,8 @@ Note: More extensive information for getting started with ext4 can be
 * extent format more robust in face of on-disk corruption due to magics,
 * internal redundancy in tree
 * improved file allocation (multi-block alloc)
-* fix 32000 subdirectory limit
+* fix 32000 subdirectory limit (when block size is 1024, the limit will be
+* less than 32000)
 * nsec timestamps for mtime, atime, ctime, create time
 * inode version field on disk (NFSv4, Lustre)
 * reduced e2fsck time via uninit_bg feature