linux-kernel - [PATCH] nilfs2: add description of NILFS_IOCTL_SET

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Date:	Tue,  4 Feb 2014 10:50:00 +0900
From:	Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	linux-nilfs <linux-nilfs@...r.kernel.org>,
	Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>,
	Andreas Rohner <andreas.rohner@....net>
Subject: [PATCH] nilfs2: add description of NILFS_IOCTL_SET_SUINFO ioctl

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@....ntt.co.jp>
Cc: Andreas Rohner <andreas.rohner@....net>
---
 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
 			        daemon.
 
+ 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.
-- 
1.7.9.3

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