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Linux kernel mirror (for testing)
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kernel
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linux
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>/notify_free
47Date: August 2010
48Contact: Nitin Gupta <ngupta@vflare.org>
49Description:
50 The notify_free file is read-only and specifies the number of
51 swap slot free notifications received by this device. These
52 notifications are sent to a swap block device when a swap slot
53 is freed. This statistic is applicable only when this disk is
54 being used as a swap disk.
55
56What: /sys/block/zram<id>/discard
57Date: August 2010
58Contact: Nitin Gupta <ngupta@vflare.org>
59Description:
60 The discard file is read-only and specifies the number of
61 discard requests received by this device. These requests
62 provide information to block device regarding blocks which are
63 no longer used by filesystem.
64
65What: /sys/block/zram<id>/zero_pages
66Date: August 2010
67Contact: Nitin Gupta <ngupta@vflare.org>
68Description:
69 The zero_pages file is read-only and specifies number of zero
70 filled pages written to this disk. No memory is allocated for
71 such pages.
72
73What: /sys/block/zram<id>/orig_data_size
74Date: August 2010
75Contact: Nitin Gupta <ngupta@vflare.org>
76Description:
77 The orig_data_size file is read-only and specifies uncompressed
78 size of data stored in this disk. This excludes zero-filled
79 pages (zero_pages) since no memory is allocated for them.
80 Unit: bytes
81
82What: /sys/block/zram<id>/compr_data_size
83Date: August 2010
84Contact: Nitin Gupta <ngupta@vflare.org>
85Description:
86 The compr_data_size file is read-only and specifies compressed
87 size of data stored in this disk. So, compression ratio can be
88 calculated using orig_data_size and this statistic.
89 Unit: bytes
90
91What: /sys/block/zram<id>/mem_used_total
92Date: August 2010
93Contact: Nitin Gupta <ngupta@vflare.org>
94Description:
95 The mem_used_total file is read-only and specifies the amount
96 of memory, including allocator fragmentation and metadata
97 overhead, allocated for this disk. So, allocator space
98 efficiency can be calculated using compr_data_size and this
99 statistic.
100 Unit: bytes