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| author | Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | 2015-04-16 01:16:03 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-16 01:35:21 +0200 |
| commit | 2f6a3bed7347ee94fe57b3501fddaa646a26d890 (patch) | |
| tree | ddbe3dca838dea06f3639394bf36bd5b4f10ee31 /Documentation/blockdev | |
| parent | zram: describe device attrs in documentation (diff) | |
| download | linux-2f6a3bed7347ee94fe57b3501fddaa646a26d890.tar.xz linux-2f6a3bed7347ee94fe57b3501fddaa646a26d890.zip | |
zram: export new 'io_stat' sysfs attrs
Per-device `zram<id>/io_stat' file provides accumulated I/O statistics of
particular zram device in a format similar to block layer statistics. The
file consists of a single line and represents the following stats
(separated by whitespace):
failed_reads
failed_writes
invalid_io
notify_free
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/blockdev')
| -rw-r--r-- | Documentation/blockdev/zram.txt | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/blockdev/zram.txt b/Documentation/blockdev/zram.txt index 971765ed5ac1..9610be3e9d36 100644 --- a/Documentation/blockdev/zram.txt +++ b/Documentation/blockdev/zram.txt @@ -133,6 +133,17 @@ File /sys/block/zram<id>/stat Represents block layer statistics. Read Documentation/block/stat.txt for details. +File /sys/block/zram<id>/io_stat + +The stat file represents device's I/O statistics not accounted by block +layer and, thus, not available in zram<id>/stat file. It consists of a +single line of text and contains the following stats separated by +whitespace: + failed_reads + failed_writes + invalid_io + notify_free + 8) Deactivate: swapoff /dev/zram0 umount /dev/zram1 |