From 23eddf39b2c28c05cb8f8203d38e61807d701b38 Mon Sep 17 00:00:00 2001 From: Minchan Kim Date: Fri, 28 Dec 2018 00:36:51 -0800 Subject: zram: add bd_stat statistics bd_stat represents things that happened in the backing device. Currently it supports bd_counts, bd_reads and bd_writes which are helpful to understand wearout of flash and memory saving. [minchan@kernel.org: v4] Link: http://lkml.kernel.org/r/20181203024045.153534-7-minchan@kernel.org Link: http://lkml.kernel.org/r/20181127055429.251614-7-minchan@kernel.org Signed-off-by: Minchan Kim Reviewed-by: Sergey Senozhatsky Cc: Joey Pabalinas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/blockdev/zram.txt | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'Documentation/blockdev') diff --git a/Documentation/blockdev/zram.txt b/Documentation/blockdev/zram.txt index 806cdaabac83..906df97527a7 100644 --- a/Documentation/blockdev/zram.txt +++ b/Documentation/blockdev/zram.txt @@ -221,6 +221,17 @@ line of text and contains the following stats separated by whitespace: pages_compacted the number of pages freed during compaction huge_pages the number of incompressible pages +File /sys/block/zram/bd_stat + +The stat file represents device's backing device statistics. It consists of +a single line of text and contains the following stats separated by whitespace: + bd_count size of data written in backing device. + Unit: 4K bytes + bd_reads the number of reads from backing device + Unit: 4K bytes + bd_writes the number of writes to backing device + Unit: 4K bytes + 9) Deactivate: swapoff /dev/zram0 umount /dev/zram1 -- cgit v1.2.3