1 What: /sys/block/zram<id>/disksize
3 Contact: Nitin Gupta <ngupta@vflare.org>
5 The disksize file is read-write and specifies the disk size
6 which represents the limit on the *uncompressed* worth of data
7 that can be stored in this disk.
10 What: /sys/block/zram<id>/initstate
12 Contact: Nitin Gupta <ngupta@vflare.org>
14 The initstate file is read-only and shows the initialization
17 What: /sys/block/zram<id>/reset
19 Contact: Nitin Gupta <ngupta@vflare.org>
21 The reset file is write-only and allows resetting the
22 device. The reset operation frees all the memory associated
25 What: /sys/block/zram<id>/max_comp_streams
27 Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
29 The max_comp_streams file is read-write and specifies the
30 number of backend's zcomp_strm compression streams (number of
31 concurrent compress operations).
33 What: /sys/block/zram<id>/comp_algorithm
35 Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
37 The comp_algorithm file is read-write and lets to show
38 available and selected compression algorithms, change
39 compression algorithm selection.
41 What: /sys/block/zram<id>/mem_used_max
43 Contact: Minchan Kim <minchan@kernel.org>
45 The mem_used_max file is write-only and is used to reset
46 the counter of maximum memory zram have consumed to store
47 compressed data. For resetting the value, you should write
48 "0". Otherwise, you could see -EINVAL.
51 What: /sys/block/zram<id>/mem_limit
53 Contact: Minchan Kim <minchan@kernel.org>
55 The mem_limit file is write-only and specifies the maximum
56 amount of memory ZRAM can use to store the compressed data.
57 The limit could be changed in run time and "0" means disable
58 the limit. No limit is the initial state. Unit: bytes
60 What: /sys/block/zram<id>/compact
62 Contact: Minchan Kim <minchan@kernel.org>
64 The compact file is write-only and trigger compaction for
65 allocator zrm uses. The allocator moves some objects so that
66 it could free fragment space.
68 What: /sys/block/zram<id>/io_stat
70 Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
72 The io_stat file is read-only and accumulates device's I/O
73 statistics not accounted by block layer. For example,
74 failed_reads, failed_writes, etc. File format is similar to
75 block layer statistics file format.
77 What: /sys/block/zram<id>/mm_stat
79 Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
81 The mm_stat file is read-only and represents device's mm
82 statistics (orig_data_size, compr_data_size, etc.) in a format
83 similar to block layer statistics file format.
85 What: /sys/block/zram<id>/debug_stat
87 Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
89 The debug_stat file is read-only and represents various
90 device's debugging info useful for kernel developers. Its
91 format is not documented intentionally and may change
92 anytime without any notice.