From 623e47fc64f8de480b322b7ed68855f97137e2a5 Mon Sep 17 00:00:00 2001 From: Sergey Senozhatsky Date: Fri, 20 May 2016 17:00:02 -0700 Subject: zram: introduce per-device debug_stat sysfs node debug_stat sysfs is read-only and represents various debugging data that zram developers may need. This file is not meant to be used by anyone else: its content is not documented and will change any time w/o any notice. Therefore, the output of debug_stat file contains a version string. To avoid any confusion, we will increase the version number every time we modify the output. At the moment this file exports only one value -- the number of re-compressions, IOW, the number of times compression fast path has failed. This stat is temporary any will be useful in case if any per-cpu compression streams regressions will be reported. Link: http://lkml.kernel.org/r/20160513230834.GB26763@bbox Link: http://lkml.kernel.org/r/20160511134553.12655-1-sergey.senozhatsky@gmail.com Signed-off-by: Sergey Senozhatsky Signed-off-by: Minchan Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/blockdev/zram.txt | 1 + 1 file changed, 1 insertion(+) (limited to 'Documentation/blockdev') diff --git a/Documentation/blockdev/zram.txt b/Documentation/blockdev/zram.txt index d88f0c70cd7f..13100fb3c26d 100644 --- a/Documentation/blockdev/zram.txt +++ b/Documentation/blockdev/zram.txt @@ -172,6 +172,7 @@ mem_limit RW the maximum amount of memory ZRAM can use to store pages_compacted RO the number of pages freed during compaction (available only via zram/mm_stat node) compact WO trigger memory compaction +debug_stat RO this file is used for zram debugging purposes WARNING ======= -- cgit v1.2.3