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authorSergey Senozhatsky <sergey.senozhatsky@gmail.com>2016-05-21 03:00:02 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-21 03:58:30 +0300
commit623e47fc64f8de480b322b7ed68855f97137e2a5 (patch)
tree0d44e61d20246d5a5329f0e1a84ac78d06668e83 /Documentation/blockdev
parent43209ea2d17aae1540d4e28274e36404f72702f2 (diff)
downloadlinux-623e47fc64f8de480b322b7ed68855f97137e2a5.tar.xz
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 <sergey.senozhatsky@gmail.com> Signed-off-by: Minchan Kim <minchan@kernel.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.txt1
1 files changed, 1 insertions, 0 deletions
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<id>/mm_stat node)
compact WO trigger memory compaction
+debug_stat RO this file is used for zram debugging purposes
WARNING
=======