Loading...
1What: /sys/block/zram<id>/disksize
2Date: August 2010
3Contact: Nitin Gupta <ngupta@vflare.org>
4Description:
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.
8
9What: /sys/block/zram<id>/initstate
10Date: August 2010
11Contact: Nitin Gupta <ngupta@vflare.org>
12Description:
13 The disksize file is read-only and shows the initialization
14 state of the device.
15
16What: /sys/block/zram<id>/reset
17Date: August 2010
18Contact: Nitin Gupta <ngupta@vflare.org>
19Description:
20 The disksize file is write-only and allows resetting the
21 device. The reset operation frees all the memory assocaited
22 with this device.
23
24What: /sys/block/zram<id>/num_reads
25Date: August 2010
26Contact: Nitin Gupta <ngupta@vflare.org>
27Description:
28 The num_reads file is read-only and specifies the number of
29 reads (failed or successful) done on this device.
30
31What: /sys/block/zram<id>/num_writes
32Date: August 2010
33Contact: Nitin Gupta <ngupta@vflare.org>
34Description:
35 The num_writes file is read-only and specifies the number of
36 writes (failed or successful) done on this device.
37
38What: /sys/block/zram<id>/invalid_io
39Date: August 2010
40Contact: Nitin Gupta <ngupta@vflare.org>
41Description:
42 The invalid_io file is read-only and specifies the number of
43 non-page-size-aligned I/O requests issued to this device.
44
45What: /sys/block/zram<id>/notify_free
46Date: August 2010
47Contact: Nitin Gupta <ngupta@vflare.org>
48Description:
49 The notify_free file is read-only and specifies the number of
50 swap slot free notifications received by this device. These
51 notifications are send to a swap block device when a swap slot
52 is freed. This statistic is applicable only when this disk is
53 being used as a swap disk.
54
55What: /sys/block/zram<id>/discard
56Date: August 2010
57Contact: Nitin Gupta <ngupta@vflare.org>
58Description:
59 The discard file is read-only and specifies the number of
60 discard requests received by this device. These requests
61 provide information to block device regarding blocks which are
62 no longer used by filesystem.
63
64What: /sys/block/zram<id>/zero_pages
65Date: August 2010
66Contact: Nitin Gupta <ngupta@vflare.org>
67Description:
68 The zero_pages file is read-only and specifies number of zero
69 filled pages written to this disk. No memory is allocated for
70 such pages.
71
72What: /sys/block/zram<id>/orig_data_size
73Date: August 2010
74Contact: Nitin Gupta <ngupta@vflare.org>
75Description:
76 The orig_data_size file is read-only and specifies uncompressed
77 size of data stored in this disk. This excludes zero-filled
78 pages (zero_pages) since no memory is allocated for them.
79 Unit: bytes
80
81What: /sys/block/zram<id>/compr_data_size
82Date: August 2010
83Contact: Nitin Gupta <ngupta@vflare.org>
84Description:
85 The compr_data_size file is read-only and specifies compressed
86 size of data stored in this disk. So, compression ratio can be
87 calculated using orig_data_size and this statistic.
88 Unit: bytes
89
90What: /sys/block/zram<id>/mem_used_total
91Date: August 2010
92Contact: Nitin Gupta <ngupta@vflare.org>
93Description:
94 The mem_used_total file is read-only and specifies the amount
95 of memory, including allocator fragmentation and metadata
96 overhead, allocated for this disk. So, allocator space
97 efficiency can be calculated using compr_data_size and this
98 statistic.
99 Unit: bytes
1What: /sys/block/zram<id>/disksize
2Date: August 2010
3Contact: Nitin Gupta <ngupta@vflare.org>
4Description:
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.
8 Unit: bytes
9
10What: /sys/block/zram<id>/initstate
11Date: August 2010
12Contact: Nitin Gupta <ngupta@vflare.org>
13Description:
14 The initstate file is read-only and shows the initialization
15 state of the device.
16
17What: /sys/block/zram<id>/reset
18Date: August 2010
19Contact: Nitin Gupta <ngupta@vflare.org>
20Description:
21 The reset file is write-only and allows resetting the
22 device. The reset operation frees all the memory associated
23 with this device.
24
25What: /sys/block/zram<id>/num_reads
26Date: August 2010
27Contact: Nitin Gupta <ngupta@vflare.org>
28Description:
29 The num_reads file is read-only and specifies the number of
30 reads (failed or successful) done on this device.
31
32What: /sys/block/zram<id>/num_writes
33Date: August 2010
34Contact: Nitin Gupta <ngupta@vflare.org>
35Description:
36 The num_writes file is read-only and specifies the number of
37 writes (failed or successful) done on this device.
38
39What: /sys/block/zram<id>/invalid_io
40Date: August 2010
41Contact: Nitin Gupta <ngupta@vflare.org>
42Description:
43 The invalid_io file is read-only and specifies the number of
44 non-page-size-aligned I/O requests issued to this device.
45
46What: /sys/block/zram<id>/failed_reads
47Date: February 2014
48Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
49Description:
50 The failed_reads file is read-only and specifies the number of
51 failed reads happened on this device.
52
53What: /sys/block/zram<id>/failed_writes
54Date: February 2014
55Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
56Description:
57 The failed_writes file is read-only and specifies the number of
58 failed writes happened on this device.
59
60What: /sys/block/zram<id>/max_comp_streams
61Date: February 2014
62Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
63Description:
64 The max_comp_streams file is read-write and specifies the
65 number of backend's zcomp_strm compression streams (number of
66 concurrent compress operations).
67
68What: /sys/block/zram<id>/comp_algorithm
69Date: February 2014
70Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
71Description:
72 The comp_algorithm file is read-write and lets to show
73 available and selected compression algorithms, change
74 compression algorithm selection.
75
76What: /sys/block/zram<id>/notify_free
77Date: August 2010
78Contact: Nitin Gupta <ngupta@vflare.org>
79Description:
80 The notify_free file is read-only and specifies the number of
81 swap slot free notifications received by this device. These
82 notifications are sent to a swap block device when a swap slot
83 is freed. This statistic is applicable only when this disk is
84 being used as a swap disk.
85
86What: /sys/block/zram<id>/zero_pages
87Date: August 2010
88Contact: Nitin Gupta <ngupta@vflare.org>
89Description:
90 The zero_pages file is read-only and specifies number of zero
91 filled pages written to this disk. No memory is allocated for
92 such pages.
93
94What: /sys/block/zram<id>/orig_data_size
95Date: August 2010
96Contact: Nitin Gupta <ngupta@vflare.org>
97Description:
98 The orig_data_size file is read-only and specifies uncompressed
99 size of data stored in this disk. This excludes zero-filled
100 pages (zero_pages) since no memory is allocated for them.
101 Unit: bytes
102
103What: /sys/block/zram<id>/compr_data_size
104Date: August 2010
105Contact: Nitin Gupta <ngupta@vflare.org>
106Description:
107 The compr_data_size file is read-only and specifies compressed
108 size of data stored in this disk. So, compression ratio can be
109 calculated using orig_data_size and this statistic.
110 Unit: bytes
111
112What: /sys/block/zram<id>/mem_used_total
113Date: August 2010
114Contact: Nitin Gupta <ngupta@vflare.org>
115Description:
116 The mem_used_total file is read-only and specifies the amount
117 of memory, including allocator fragmentation and metadata
118 overhead, allocated for this disk. So, allocator space
119 efficiency can be calculated using compr_data_size and this
120 statistic.
121 Unit: bytes