About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Documentation / ABI / testing / sysfs-block-zram




Custom Search

Based on kernel version 3.13. Page generated on 2014-01-20 21:59 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>/notify_free
47	Date:		August 2010
48	Contact:	Nitin Gupta <ngupta@vflare.org>
49	Description:
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	
56	What:		/sys/block/zram<id>/discard
57	Date:		August 2010
58	Contact:	Nitin Gupta <ngupta@vflare.org>
59	Description:
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	
65	What:		/sys/block/zram<id>/zero_pages
66	Date:		August 2010
67	Contact:	Nitin Gupta <ngupta@vflare.org>
68	Description:
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	
73	What:		/sys/block/zram<id>/orig_data_size
74	Date:		August 2010
75	Contact:	Nitin Gupta <ngupta@vflare.org>
76	Description:
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	
82	What:		/sys/block/zram<id>/compr_data_size
83	Date:		August 2010
84	Contact:	Nitin Gupta <ngupta@vflare.org>
85	Description:
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	
91	What:		/sys/block/zram<id>/mem_used_total
92	Date:		August 2010
93	Contact:	Nitin Gupta <ngupta@vflare.org>
94	Description:
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
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.