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zram: document failed_reads, failed_writes stats

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Document `failed_reads' and `failed_writes' device attributes.
Remove info about `discard' - there is no such zram attr.

Signed-off-by: Sergey Senozhatsky <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Jerome Marchand <[email protected]>
Cc: Nitin Gupta <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Sergey Senozhatsky 2014-04-07 15:38:08 -07:00 • committed by Linus Torvalds
commit 8dd1d3247e
2 changed files with 17 additions and 10 deletions
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24
Documentation/ABI/testing/sysfs-block-zram
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@ -43,6 +43,21 @@ 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>/failed_reads
Date: February 2014
Contact: Sergey Senozhatsky <[email protected]>
Description:
The failed_reads file is read-only and specifies the number of
failed reads happened on this device.
What: /sys/block/zram<id>/failed_writes
Date: February 2014
Contact: Sergey Senozhatsky <[email protected]>
Description:
The failed_writes file is read-only and specifies the number of
failed writes happened on this device.
What: /sys/block/zram<id>/notify_free
Date: August 2010
Contact: Nitin Gupta <[email protected]>
@ -53,15 +68,6 @@ Description:
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 <[email protected]>
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 <[email protected]>