About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Documentation / ABI / testing / sysfs-block-zram




Custom Search

Based on kernel version 3.16. Page generated on 2014-08-06 21:35 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			Unit: bytes
9	
10	What:		/sys/block/zram<id>/initstate
11	Date:		August 2010
12	Contact:	Nitin Gupta <ngupta@vflare.org>
13	Description:
14			The initstate file is read-only and shows the initialization
15			state of the device.
16	
17	What:		/sys/block/zram<id>/reset
18	Date:		August 2010
19	Contact:	Nitin Gupta <ngupta@vflare.org>
20	Description:
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	
25	What:		/sys/block/zram<id>/num_reads
26	Date:		August 2010
27	Contact:	Nitin Gupta <ngupta@vflare.org>
28	Description:
29			The num_reads file is read-only and specifies the number of
30			reads (failed or successful) done on this device.
31	
32	What:		/sys/block/zram<id>/num_writes
33	Date:		August 2010
34	Contact:	Nitin Gupta <ngupta@vflare.org>
35	Description:
36			The num_writes file is read-only and specifies the number of
37			writes (failed or successful) done on this device.
38	
39	What:		/sys/block/zram<id>/invalid_io
40	Date:		August 2010
41	Contact:	Nitin Gupta <ngupta@vflare.org>
42	Description:
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	
46	What:		/sys/block/zram<id>/failed_reads
47	Date:		February 2014
48	Contact:	Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
49	Description:
50			The failed_reads file is read-only and specifies the number of
51			failed reads happened on this device.
52	
53	What:		/sys/block/zram<id>/failed_writes
54	Date:		February 2014
55	Contact:	Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
56	Description:
57			The failed_writes file is read-only and specifies the number of
58			failed writes happened on this device.
59	
60	What:		/sys/block/zram<id>/max_comp_streams
61	Date:		February 2014
62	Contact:	Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
63	Description:
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	
68	What:		/sys/block/zram<id>/comp_algorithm
69	Date:		February 2014
70	Contact:	Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
71	Description:
72			The comp_algorithm file is read-write and lets to show
73			available and selected compression algorithms, change
74			compression algorithm selection.
75	
76	What:		/sys/block/zram<id>/notify_free
77	Date:		August 2010
78	Contact:	Nitin Gupta <ngupta@vflare.org>
79	Description:
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	
86	What:		/sys/block/zram<id>/zero_pages
87	Date:		August 2010
88	Contact:	Nitin Gupta <ngupta@vflare.org>
89	Description:
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	
94	What:		/sys/block/zram<id>/orig_data_size
95	Date:		August 2010
96	Contact:	Nitin Gupta <ngupta@vflare.org>
97	Description:
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	
103	What:		/sys/block/zram<id>/compr_data_size
104	Date:		August 2010
105	Contact:	Nitin Gupta <ngupta@vflare.org>
106	Description:
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	
112	What:		/sys/block/zram<id>/mem_used_total
113	Date:		August 2010
114	Contact:	Nitin Gupta <ngupta@vflare.org>
115	Description:
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
Hide Line Numbers
About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Information is copyright its respective author. All material is available from the Linux Kernel Source distributed under a GPL License. This page is provided as a free service by mjmwired.net.