Merge tag 'samsung-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene...

[sfrench/cifs-2.6.git] / Documentation / filesystems / f2fs.txt

diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index a2046a7d0a9d6319c5be0c59d9ffea461ad9f53f..2cca5a25ef89f4ab2c9a52986c4f2cc41a3c0f94 100644 (file)
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -192,15 +192,22 @@ Files in /sys/fs/f2fs/<devname>
 
  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.
+                               0x01: F2FS_IPU_FORCE, 0x02: F2FS_IPU_SSR,
+                               0x04: F2FS_IPU_UTIL,  0x08: F2FS_IPU_SSR_UTIL,
+                               0x10: F2FS_IPU_FSYNC.
 
  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.
 
+ min_fsync_blocks             This parameter controls the threshold to trigger
+                              in-place-updates when F2FS_IPU_FSYNC mode is set.
+                             The number indicates the number of dirty pages
+                             when fsync needs to flush on its call path. If
+                             the number is less than this value, it triggers
+                             in-place-updates.
+
  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