GNU Linux-libre 4.4.294-gnu1
[releases.git] / Documentation / ABI / testing / sysfs-fs-f2fs
1 What:           /sys/fs/f2fs/<disk>/gc_max_sleep_time
2 Date:           July 2013
3 Contact:        "Namjae Jeon" <namjae.jeon@samsung.com>
4 Description:
5                  Controls the maximun sleep time for gc_thread. Time
6                  is in milliseconds.
7
8 What:           /sys/fs/f2fs/<disk>/gc_min_sleep_time
9 Date:           July 2013
10 Contact:        "Namjae Jeon" <namjae.jeon@samsung.com>
11 Description:
12                  Controls the minimum sleep time for gc_thread. Time
13                  is in milliseconds.
14
15 What:           /sys/fs/f2fs/<disk>/gc_no_gc_sleep_time
16 Date:           July 2013
17 Contact:        "Namjae Jeon" <namjae.jeon@samsung.com>
18 Description:
19                  Controls the default sleep time for gc_thread. Time
20                  is in milliseconds.
21
22 What:           /sys/fs/f2fs/<disk>/gc_idle
23 Date:           July 2013
24 Contact:        "Namjae Jeon" <namjae.jeon@samsung.com>
25 Description:
26                  Controls the victim selection policy for garbage collection.
27
28 What:           /sys/fs/f2fs/<disk>/reclaim_segments
29 Date:           October 2013
30 Contact:        "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
31 Description:
32                  Controls the issue rate of segment discard commands.
33
34 What:           /sys/fs/f2fs/<disk>/ipu_policy
35 Date:           November 2013
36 Contact:        "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
37 Description:
38                  Controls the in-place-update policy.
39
40 What:           /sys/fs/f2fs/<disk>/min_ipu_util
41 Date:           November 2013
42 Contact:        "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
43 Description:
44                  Controls the FS utilization condition for the in-place-update
45                  policies.
46
47 What:           /sys/fs/f2fs/<disk>/min_fsync_blocks
48 Date:           September 2014
49 Contact:        "Jaegeuk Kim" <jaegeuk@kernel.org>
50 Description:
51                  Controls the dirty page count condition for the in-place-update
52                  policies.
53
54 What:           /sys/fs/f2fs/<disk>/max_small_discards
55 Date:           November 2013
56 Contact:        "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
57 Description:
58                  Controls the issue rate of small discard commands.
59
60 What:           /sys/fs/f2fs/<disk>/max_victim_search
61 Date:           January 2014
62 Contact:        "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
63 Description:
64                  Controls the number of trials to find a victim segment.
65
66 What:           /sys/fs/f2fs/<disk>/dir_level
67 Date:           March 2014
68 Contact:        "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
69 Description:
70                  Controls the directory level for large directory.
71
72 What:           /sys/fs/f2fs/<disk>/ram_thresh
73 Date:           March 2014
74 Contact:        "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
75 Description:
76                  Controls the memory footprint used by f2fs.
77
78 What:           /sys/fs/f2fs/<disk>/trim_sections
79 Date:           February 2015
80 Contact:        "Jaegeuk Kim" <jaegeuk@kernel.org>
81 Description:
82                  Controls the trimming rate in batch mode.
83
84 What:           /sys/fs/f2fs/<disk>/cp_interval
85 Date:           October 2015
86 Contact:        "Jaegeuk Kim" <jaegeuk@kernel.org>
87 Description:
88                  Controls the checkpoint timing.
89
90 What:           /sys/fs/f2fs/<disk>/ra_nid_pages
91 Date:           October 2015
92 Contact:        "Chao Yu" <chao2.yu@samsung.com>
93 Description:
94                  Controls the count of nid pages to be readaheaded.