From 2f6a3bed7347ee94fe57b3501fddaa646a26d890 Mon Sep 17 00:00:00 2001 From: Sergey Senozhatsky Date: Wed, 15 Apr 2015 16:16:03 -0700 Subject: zram: export new 'io_stat' sysfs attrs Per-device `zram/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 Acked-by: Minchan Kim Cc: Nitin Gupta Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/ABI/testing/sysfs-block-zram | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-block-zram b/Documentation/ABI/testing/sysfs-block-zram index 91ad7071b9e8..a7f622f9bcf6 100644 --- a/Documentation/ABI/testing/sysfs-block-zram +++ b/Documentation/ABI/testing/sysfs-block-zram @@ -149,3 +149,12 @@ Description: The compact file is write-only and trigger compaction for allocator zrm uses. The allocator moves some objects so that it could free fragment space. + +What: /sys/block/zram/io_stat +Date: August 2015 +Contact: Sergey Senozhatsky +Description: + The io_stat file is read-only and accumulates device's I/O + statistics not accounted by block layer. For example, + failed_reads, failed_writes, etc. File format is similar to + block layer statistics file format. -- cgit v1.2.3