f2fs: add missing sysfs entries in documentation

This patch cleans up documentation to cover missing sysfs entries.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index f7b5e4f..66aca04 100644 (file)
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -246,11 +246,14 @@ Files in /sys/fs/f2fs/<devname>
 ..............................................................................
  File                         Content
 
- gc_max_sleep_time            This tuning parameter controls the maximum sleep
+ gc_urgent_sleep_time         This parameter controls sleep time for gc_urgent.
+                              500 ms is set by default. See above gc_urgent.
+
+ gc_min_sleep_time            This tuning parameter controls the minimum sleep
                               time for the garbage collection thread. Time is
                               in milliseconds.
 
- gc_min_sleep_time            This tuning parameter controls the minimum sleep
+ gc_max_sleep_time            This tuning parameter controls the maximum sleep
                               time for the garbage collection thread. Time is
                               in milliseconds.
 
@@ -270,9 +273,6 @@ Files in /sys/fs/f2fs/<devname>
                               to 1, background thread starts to do GC by given
                               gc_urgent_sleep_time interval.
 
- gc_urgent_sleep_time         This parameter controls sleep time for gc_urgent.
-                              500 ms is set by default. See above gc_urgent.
-
  reclaim_segments             This parameter controls the number of prefree
                               segments to be reclaimed. If the number of prefree
                              segments is larger than the number of segments
@@ -287,7 +287,16 @@ Files in /sys/fs/f2fs/<devname>
                              checkpoint is triggered, and issued during the
                              checkpoint. By default, it is disabled with 0.
 
- trim_sections                This parameter controls the number of sections
+ discard_granularity         This parameter controls the granularity of discard
+                             command size. It will issue discard commands iif
+                             the size is larger than given granularity. Its
+                             unit size is 4KB, and 4 (=16KB) is set by default.
+                             The maximum value is 128 (=512KB).
+
+ reserved_blocks             This parameter indicates the number of blocks that
+                             f2fs reserves internally for root.
+
+ batched_trim_sections       This parameter controls the number of sections
                               to be trimmed out in batch mode when FITRIM
                               conducts. 32 sections is set by default.
 
@@ -309,11 +318,35 @@ Files in /sys/fs/f2fs/<devname>
                              the number is less than this value, it triggers
                              in-place-updates.
 
+ min_seq_blocks                      This parameter controls the threshold to serialize
+                             write IOs issued by multiple threads in parallel.
+
+ min_hot_blocks                      This parameter controls the threshold to allocate
+                             a hot data log for pending data blocks to write.
+
+ min_ssr_sections            This parameter adds the threshold when deciding
+                             SSR block allocation. If this is large, SSR mode
+                             will be enabled early.
+
+ ram_thresh                   This parameter controls the memory footprint used
+                             by free nids and cached nat entries. By default,
+                             10 is set, which indicates 10 MB / 1 GB RAM.
+
+ ra_nid_pages                When building free nids, F2FS reads NAT blocks
+                             ahead for speed up. Default is 0.
+
+ dirty_nats_ratio            Given dirty ratio of cached nat entries, F2FS
+                             determines flushing them in background.
+
  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.
 
+ migration_granularity       For large-sized sections, F2FS can stop GC given
+                             this granularity instead of reclaiming entire
+                             section.
+
  dir_level                    This parameter controls the directory level to
                              support large directory. If a directory has a
                              number of files, it can reduce the file lookup
@@ -321,9 +354,47 @@ Files in /sys/fs/f2fs/<devname>
                              Otherwise, it needs to decrease this value to
                              reduce the space overhead. The default value is 0.
 
- ram_thresh                   This parameter controls the memory footprint used
-                             by free nids and cached nat entries. By default,
-                             10 is set, which indicates 10 MB / 1 GB RAM.
+ cp_interval                 F2FS tries to do checkpoint periodically, 60 secs
+                             by default.
+
+ idle_interval               F2FS detects system is idle, if there's no F2FS
+                             operations during given interval, 5 secs by
+                             default.
+
+ discard_idle_interval       F2FS detects the discard thread is idle, given
+                             time interval. Default is 5 secs.
+
+ gc_idle_interval            F2FS detects the GC thread is idle, given time
+                             interval. Default is 5 secs.
+
+ umount_discard_timeout       When unmounting the disk, F2FS waits for finishing
+                             queued discard commands which can take huge time.
+                             This gives time out for it, 5 secs by default.
+
+ iostat_enable               This controls to enable/disable iostat in F2FS.
+
+ readdir_ra                  This enables/disabled readahead of inode blocks
+                             in readdir, and default is enabled.
+
+ gc_pin_file_thresh          This indicates how many GC can be failed for the
+                             pinned file. If it exceeds this, F2FS doesn't
+                             guarantee its pinning state. 2048 trials is set
+                             by default.
+
+ extension_list                      This enables to change extension_list for hot/cold
+                             files in runtime.
+
+ inject_rate                 This controls injection rate of arbitrary faults.
+
+ inject_type                 This controls injection type of arbitrary faults.
+
+ dirty_segments              This shows # of dirty segments.
+
+ lifetime_write_kbytes       This shows # of data written to the disk.
+
+ features                    This shows current features enabled on F2FS.
+
+ current_reserved_blocks      This shows # of blocks currently reserved.
 
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 USAGE