mirror of https://gitee.com/openkylin/linux.git
99 lines
3.3 KiB
Plaintext
99 lines
3.3 KiB
Plaintext
What: /sys/block/zram<id>/disksize
|
|
Date: August 2010
|
|
Contact: Nitin Gupta <ngupta@vflare.org>
|
|
Description:
|
|
The disksize file is read-write and specifies the disk size
|
|
which represents the limit on the *uncompressed* worth of data
|
|
that can be stored in this disk.
|
|
|
|
What: /sys/block/zram<id>/initstate
|
|
Date: August 2010
|
|
Contact: Nitin Gupta <ngupta@vflare.org>
|
|
Description:
|
|
The disksize file is read-only and shows the initialization
|
|
state of the device.
|
|
|
|
What: /sys/block/zram<id>/reset
|
|
Date: August 2010
|
|
Contact: Nitin Gupta <ngupta@vflare.org>
|
|
Description:
|
|
The disksize file is write-only and allows resetting the
|
|
device. The reset operation frees all the memory assocaited
|
|
with this device.
|
|
|
|
What: /sys/block/zram<id>/num_reads
|
|
Date: August 2010
|
|
Contact: Nitin Gupta <ngupta@vflare.org>
|
|
Description:
|
|
The num_reads file is read-only and specifies the number of
|
|
reads (failed or successful) done on this device.
|
|
|
|
What: /sys/block/zram<id>/num_writes
|
|
Date: August 2010
|
|
Contact: Nitin Gupta <ngupta@vflare.org>
|
|
Description:
|
|
The num_writes file is read-only and specifies the number of
|
|
writes (failed or successful) done on this device.
|
|
|
|
What: /sys/block/zram<id>/invalid_io
|
|
Date: August 2010
|
|
Contact: Nitin Gupta <ngupta@vflare.org>
|
|
Description:
|
|
The invalid_io file is read-only and specifies the number of
|
|
non-page-size-aligned I/O requests issued to this device.
|
|
|
|
What: /sys/block/zram<id>/notify_free
|
|
Date: August 2010
|
|
Contact: Nitin Gupta <ngupta@vflare.org>
|
|
Description:
|
|
The notify_free file is read-only and specifies the number of
|
|
swap slot free notifications received by this device. These
|
|
notifications are send to a swap block device when a swap slot
|
|
is freed. This statistic is applicable only when this disk is
|
|
being used as a swap disk.
|
|
|
|
What: /sys/block/zram<id>/discard
|
|
Date: August 2010
|
|
Contact: Nitin Gupta <ngupta@vflare.org>
|
|
Description:
|
|
The discard file is read-only and specifies the number of
|
|
discard requests received by this device. These requests
|
|
provide information to block device regarding blocks which are
|
|
no longer used by filesystem.
|
|
|
|
What: /sys/block/zram<id>/zero_pages
|
|
Date: August 2010
|
|
Contact: Nitin Gupta <ngupta@vflare.org>
|
|
Description:
|
|
The zero_pages file is read-only and specifies number of zero
|
|
filled pages written to this disk. No memory is allocated for
|
|
such pages.
|
|
|
|
What: /sys/block/zram<id>/orig_data_size
|
|
Date: August 2010
|
|
Contact: Nitin Gupta <ngupta@vflare.org>
|
|
Description:
|
|
The orig_data_size file is read-only and specifies uncompressed
|
|
size of data stored in this disk. This excludes zero-filled
|
|
pages (zero_pages) since no memory is allocated for them.
|
|
Unit: bytes
|
|
|
|
What: /sys/block/zram<id>/compr_data_size
|
|
Date: August 2010
|
|
Contact: Nitin Gupta <ngupta@vflare.org>
|
|
Description:
|
|
The compr_data_size file is read-only and specifies compressed
|
|
size of data stored in this disk. So, compression ratio can be
|
|
calculated using orig_data_size and this statistic.
|
|
Unit: bytes
|
|
|
|
What: /sys/block/zram<id>/mem_used_total
|
|
Date: August 2010
|
|
Contact: Nitin Gupta <ngupta@vflare.org>
|
|
Description:
|
|
The mem_used_total file is read-only and specifies the amount
|
|
of memory, including allocator fragmentation and metadata
|
|
overhead, allocated for this disk. So, allocator space
|
|
efficiency can be calculated using compr_data_size and this
|
|
statistic.
|
|
Unit: bytes |