[PATCH] nilfs2: add description of NILFS_IOCTL_SET_SUINFO ioctl

From: Ryusuke Konishi
Date: Mon Feb 03 2014 - 20:51:41 EST

Add description of NILFS_IOCTL_SET_SUINFO ioctl in
Documentation/filesystems/nilfs2.txt to make it up-to-date.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx>
Cc: Andreas Rohner <andreas.rohner@xxxxxxx>
Documentation/filesystems/nilfs2.txt | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/Documentation/filesystems/nilfs2.txt b/Documentation/filesystems/nilfs2.txt
index 06887d4..8b887ae 100644
--- a/Documentation/filesystems/nilfs2.txt
+++ b/Documentation/filesystems/nilfs2.txt
@@ -111,6 +111,13 @@ Table of NILFS2 specific ioctls
nilfs_resize utilities and by nilfs_cleanerd

+ NILFS_IOCTL_SET_SUINFO Modify segment usage info of requested
+ segments. This ioctl is used by
+ nilfs_cleanerd daemon to skip unnecessary
+ cleaning operation of segments and reduce
+ performance penalty or wear of flash device
+ due to redundant move of in-use blocks.
NILFS_IOCTL_GET_SUSTAT Return segment usage statistics. This ioctl
is used in lssu, nilfs_resize utilities and
by nilfs_cleanerd daemon.

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