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| author | Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | 2016-05-20 17:00:02 -0700 |
|---|---|---|
| committer | Amit Pundir <amit.pundir@linaro.org> | 2018-10-04 14:16:10 +0530 |
| commit | 9bf02241b09bf87cf109374fd0fcc0120fa6becc (patch) | |
| tree | fb96479f834d40659eb4c997c767fb4e9312e1c7 /drivers/block/zram/zram_drv.h | |
| parent | 6cbf23139066c396b7856c37ceeb164135f55e77 (diff) | |
UPSTREAM: 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>
(cherry picked from commit 623e47fc64f8de480b322b7ed68855f97137e2a5)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: Ie0ef61db7aa0b2c713de1d8bf48e8a545b4276e9
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Diffstat (limited to 'drivers/block/zram/zram_drv.h')
| -rw-r--r-- | drivers/block/zram/zram_drv.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h index 06b1636f4722..3f5bf66a27e4 100644 --- a/drivers/block/zram/zram_drv.h +++ b/drivers/block/zram/zram_drv.h @@ -85,6 +85,7 @@ struct zram_stats { atomic64_t zero_pages; /* no. of zero filled pages */ atomic64_t pages_stored; /* no. of pages currently stored */ atomic_long_t max_used_pages; /* no. of maximum pages stored */ + atomic64_t writestall; /* no. of write slow paths */ }; struct zram_meta { |