Messages in this thread | | | Date | Thu, 12 Mar 2015 10:41:57 +0900 | From | Minchan Kim <> | Subject | Re: [PATCH 6/6] zram: export new 'mm_stat' sysfs attrs |
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On Wed, Mar 11, 2015 at 12:08:34AM +0900, Sergey Senozhatsky wrote: > Per-device `zram<id>/mm_stat' file provides accumulated mm 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): > orig_data_size > compr_data_size > mem_used_total > mem_limit > mem_used_max > zero_pages > num_migrated > > Since now we have three stat files (block layer zram<id>/stat, > zram<id>/io_stat and zram<id>/mm_stat) document WARNING about > per-stat sysfs nodes being deprecated.
Any user doesn't take care of document. I think we should add pr_warn_once to notify the user if he tried deprecated interface. In addition, we should add deprecated interface in Documentation/ABI/obsolete/
> > Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> > --- > Documentation/ABI/testing/sysfs-block-zram | 8 ++++++++ > Documentation/blockdev/zram.txt | 18 +++++++++++++++++ > drivers/block/zram/zram_drv.c | 31 ++++++++++++++++++++++++++++++ > 3 files changed, 57 insertions(+) > > diff --git a/Documentation/ABI/testing/sysfs-block-zram b/Documentation/ABI/testing/sysfs-block-zram > index a7f622f..8114c81 100644 > --- a/Documentation/ABI/testing/sysfs-block-zram > +++ b/Documentation/ABI/testing/sysfs-block-zram > @@ -158,3 +158,11 @@ Description: > statistics not accounted by block layer. For example, > failed_reads, failed_writes, etc. File format is similar to > block layer statistics file format. > + > +What: /sys/block/zram<id>/mm_stat > +Date: August 2015 > +Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> > +Description: > + The mm_stat file is read-only and accumulates device's mm > + statistics (orig_data_size, compr_data_size, etc.) in a format
Every field in mm_stat doesn't mean accumulation.
-- Kind regards, Minchan Kim
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