2 files changed, 55 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
index 31942efcaf0e..32b0809203dd 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -24,3 +24,34 @@ Date:		July 2013
 Contact:        "Namjae Jeon" <namjae.jeon@samsung.com>
 Description:
                  Controls the victim selection policy for garbage collection.
+
+What:           /sys/fs/f2fs/<disk>/reclaim_segments
+Date:           October 2013
+Contact:        "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
+Description:
+                 Controls the issue rate of segment discard commands.
+
+What:           /sys/fs/f2fs/<disk>/ipu_policy
+Date:           November 2013
+Contact:        "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
+Description:
+                 Controls the in-place-update policy.
+
+What:           /sys/fs/f2fs/<disk>/min_ipu_util
+Date:           November 2013
+Contact:        "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
+Description:
+                 Controls the FS utilization condition for the in-place-update
+                 policies.
+
+What:           /sys/fs/f2fs/<disk>/max_small_discards
+Date:           November 2013
+Contact:        "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
+Description:
+                 Controls the issue rate of small discard commands.
+
+What:           /sys/fs/f2fs/<disk>/max_victim_search
+Date:           January 2014
+Contact:        "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
+Description:
+                 Controls the number of trials to find a victim segment.
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index a3fe811bbdbc..b8d284975f0f 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -120,6 +120,8 @@ active_logs=%u         Support configuring the number of active logs. In the
 disable_ext_identify   Disable the extension list configured by mkfs, so f2fs
                        does not aware of cold files such as media files.
 inline_xattr           Enable the inline xattrs feature.
+inline_data            Enable the inline data feature: New created small(<~3.4k)
+                       files can be written into inode block.
 
 ================================================================================
 DEBUGFS ENTRIES
@@ -171,6 +173,28 @@ Files in /sys/fs/f2fs/<devname>
                               conduct checkpoint to reclaim the prefree segments
                               to free segments. By default, 100 segments, 200MB.
 
+ max_small_discards           This parameter controls the number of discard
+                              commands that consist small blocks less than 2MB.
+                              The candidates to be discarded are cached until
+                              checkpoint is triggered, and issued during the
+                              checkpoint. By default, it is disabled with 0.
+
+ ipu_policy                   This parameter controls the policy of in-place
+                              updates in f2fs. There are five policies:
+                               0: F2FS_IPU_FORCE, 1: F2FS_IPU_SSR,
+                               2: F2FS_IPU_UTIL,  3: F2FS_IPU_SSR_UTIL,
+                               4: F2FS_IPU_DISABLE.
+
+ min_ipu_util                 This parameter controls the threshold to trigger
+                              in-place-updates. The number indicates percentage
+                              of the filesystem utilization, and used by
+                              F2FS_IPU_UTIL and F2FS_IPU_SSR_UTIL policies.
+
+ max_victim_search            This parameter controls the number of trials to
+                              find a victim segment when conducting SSR and
+                              cleaning operations. The default value is 4096
+                              which covers 8GB block address range.
+
 ================================================================================
 USAGE
 ================================================================================