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Based on kernel version 3.9. Page generated on 2013-05-02 22:53 EST.

1	What:		/sys/block/zram<id>/disksize
2	Date:		August 2010
3	Contact:	Nitin Gupta <ngupta@vflare.org>
4	Description:
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	
9	What:		/sys/block/zram<id>/initstate
10	Date:		August 2010
11	Contact:	Nitin Gupta <ngupta@vflare.org>
12	Description:
13			The disksize file is read-only and shows the initialization
14			state of the device.
15	
16	What:		/sys/block/zram<id>/reset
17	Date:		August 2010
18	Contact:	Nitin Gupta <ngupta@vflare.org>
19	Description:
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	
24	What:		/sys/block/zram<id>/num_reads
25	Date:		August 2010
26	Contact:	Nitin Gupta <ngupta@vflare.org>
27	Description:
28			The num_reads file is read-only and specifies the number of
29			reads (failed or successful) done on this device.
30	
31	What:		/sys/block/zram<id>/num_writes
32	Date:		August 2010
33	Contact:	Nitin Gupta <ngupta@vflare.org>
34	Description:
35			The num_writes file is read-only and specifies the number of
36			writes (failed or successful) done on this device.
37	
38	What:		/sys/block/zram<id>/invalid_io
39	Date:		August 2010
40	Contact:	Nitin Gupta <ngupta@vflare.org>
41	Description:
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	
45	What:		/sys/block/zram<id>/notify_free
46	Date:		August 2010
47	Contact:	Nitin Gupta <ngupta@vflare.org>
48	Description:
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	
55	What:		/sys/block/zram<id>/discard
56	Date:		August 2010
57	Contact:	Nitin Gupta <ngupta@vflare.org>
58	Description:
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	
64	What:		/sys/block/zram<id>/zero_pages
65	Date:		August 2010
66	Contact:	Nitin Gupta <ngupta@vflare.org>
67	Description:
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	
72	What:		/sys/block/zram<id>/orig_data_size
73	Date:		August 2010
74	Contact:	Nitin Gupta <ngupta@vflare.org>
75	Description:
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	
81	What:		/sys/block/zram<id>/compr_data_size
82	Date:		August 2010
83	Contact:	Nitin Gupta <ngupta@vflare.org>
84	Description:
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	
90	What:		/sys/block/zram<id>/mem_used_total
91	Date:		August 2010
92	Contact:	Nitin Gupta <ngupta@vflare.org>
93	Description:
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
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