1What:		/sys/fs/f2fs/<disk>/gc_max_sleep_time
2Date:		July 2013
3Contact:	"Namjae Jeon" <namjae.jeon@samsung.com>
4Description:
5		 Controls the maximun sleep time for gc_thread. Time
6		 is in milliseconds.
7
8What:		/sys/fs/f2fs/<disk>/gc_min_sleep_time
9Date:		July 2013
10Contact:	"Namjae Jeon" <namjae.jeon@samsung.com>
11Description:
12		 Controls the minimum sleep time for gc_thread. Time
13		 is in milliseconds.
14
15What:		/sys/fs/f2fs/<disk>/gc_no_gc_sleep_time
16Date:		July 2013
17Contact:	"Namjae Jeon" <namjae.jeon@samsung.com>
18Description:
19		 Controls the default sleep time for gc_thread. Time
20		 is in milliseconds.
21
22What:		/sys/fs/f2fs/<disk>/gc_idle
23Date:		July 2013
24Contact:	"Namjae Jeon" <namjae.jeon@samsung.com>
25Description:
26		 Controls the victim selection policy for garbage collection.
27
28What:		/sys/fs/f2fs/<disk>/reclaim_segments
29Date:		October 2013
30Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
31Description:
32		 Controls the issue rate of segment discard commands.
33
34What:		/sys/fs/f2fs/<disk>/ipu_policy
35Date:		November 2013
36Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
37Description:
38		 Controls the in-place-update policy.
39
40What:		/sys/fs/f2fs/<disk>/min_ipu_util
41Date:		November 2013
42Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
43Description:
44		 Controls the FS utilization condition for the in-place-update
45		 policies.
46
47What:		/sys/fs/f2fs/<disk>/min_fsync_blocks
48Date:		September 2014
49Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
50Description:
51		 Controls the dirty page count condition for the in-place-update
52		 policies.
53
54What:		/sys/fs/f2fs/<disk>/min_hot_blocks
55Date:		March 2017
56Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
57Description:
58		 Controls the dirty page count condition for redefining hot data.
59
60What:		/sys/fs/f2fs/<disk>/min_ssr_sections
61Date:		October 2017
62Contact:	"Chao Yu" <yuchao0@huawei.com>
63Description:
64		 Controls the fee section threshold to trigger SSR allocation.
65
66What:		/sys/fs/f2fs/<disk>/max_small_discards
67Date:		November 2013
68Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
69Description:
70		 Controls the issue rate of small discard commands.
71
72What:          /sys/fs/f2fs/<disk>/discard_granularity
73Date:          July 2017
74Contact:       "Chao Yu" <yuchao0@huawei.com>
75Description:
76		Controls discard granularity of inner discard thread, inner thread
77		will not issue discards with size that is smaller than granularity.
78		The unit size is one block, now only support configuring in range
79		of [1, 512].
80
81What:		/sys/fs/f2fs/<disk>/max_victim_search
82Date:		January 2014
83Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
84Description:
85		 Controls the number of trials to find a victim segment.
86
87What:		/sys/fs/f2fs/<disk>/dir_level
88Date:		March 2014
89Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
90Description:
91		 Controls the directory level for large directory.
92
93What:		/sys/fs/f2fs/<disk>/ram_thresh
94Date:		March 2014
95Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
96Description:
97		 Controls the memory footprint used by f2fs.
98
99What:		/sys/fs/f2fs/<disk>/batched_trim_sections
100Date:		February 2015
101Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
102Description:
103		 Controls the trimming rate in batch mode.
104
105What:		/sys/fs/f2fs/<disk>/cp_interval
106Date:		October 2015
107Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
108Description:
109		 Controls the checkpoint timing.
110
111What:		/sys/fs/f2fs/<disk>/idle_interval
112Date:		January 2016
113Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
114Description:
115		 Controls the idle timing.
116
117What:		/sys/fs/f2fs/<disk>/iostat_enable
118Date:		August 2017
119Contact:	"Chao Yu" <yuchao0@huawei.com>
120Description:
121		 Controls to enable/disable IO stat.
122
123What:		/sys/fs/f2fs/<disk>/ra_nid_pages
124Date:		October 2015
125Contact:	"Chao Yu" <chao2.yu@samsung.com>
126Description:
127		 Controls the count of nid pages to be readaheaded.
128
129What:		/sys/fs/f2fs/<disk>/dirty_nats_ratio
130Date:		January 2016
131Contact:	"Chao Yu" <chao2.yu@samsung.com>
132Description:
133		 Controls dirty nat entries ratio threshold, if current
134		 ratio exceeds configured threshold, checkpoint will
135		 be triggered for flushing dirty nat entries.
136
137What:		/sys/fs/f2fs/<disk>/lifetime_write_kbytes
138Date:		January 2016
139Contact:	"Shuoran Liu" <liushuoran@huawei.com>
140Description:
141		 Shows total written kbytes issued to disk.
142
143What:		/sys/fs/f2fs/<disk>/feature
144Date:		July 2017
145Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
146Description:
147		 Shows all enabled features in current device.
148
149What:		/sys/fs/f2fs/<disk>/inject_rate
150Date:		May 2016
151Contact:	"Sheng Yong" <shengyong1@huawei.com>
152Description:
153		 Controls the injection rate.
154
155What:		/sys/fs/f2fs/<disk>/inject_type
156Date:		May 2016
157Contact:	"Sheng Yong" <shengyong1@huawei.com>
158Description:
159		 Controls the injection type.
160
161What:		/sys/fs/f2fs/<disk>/reserved_blocks
162Date:		June 2017
163Contact:	"Chao Yu" <yuchao0@huawei.com>
164Description:
165		 Controls target reserved blocks in system, the threshold
166		 is soft, it could exceed current available user space.
167
168What:		/sys/fs/f2fs/<disk>/current_reserved_blocks
169Date:		October 2017
170Contact:	"Yunlong Song" <yunlong.song@huawei.com>
171Contact:	"Chao Yu" <yuchao0@huawei.com>
172Description:
173		 Shows current reserved blocks in system, it may be temporarily
174		 smaller than target_reserved_blocks, but will gradually
175		 increase to target_reserved_blocks when more free blocks are
176		 freed by user later.
177
178What:		/sys/fs/f2fs/<disk>/gc_urgent
179Date:		August 2017
180Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
181Description:
182		 Do background GC agressively
183
184What:		/sys/fs/f2fs/<disk>/gc_urgent_sleep_time
185Date:		August 2017
186Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
187Description:
188		 Controls sleep time of GC urgent mode
189