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zram: export new 'mm_stat' sysfs attrs

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Per-device `zram<id>/mm_stat' file provides mm statistics of a 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

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Sergey Senozhatsky
2015-04-15 16:16:06 -07:00
committed by Linus Torvalds
parent 2f6a3bed73
commit 4f2109f608
3 changed files with 51 additions and 0 deletions
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12
Documentation/blockdev/zram.txt
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@@ -144,6 +144,18 @@ whitespace:
invalid_io
notify_free
File /sys/block/zram<id>/mm_stat
The stat file represents device's mm statistics. It consists of a single
line of text and contains the following stats separated by whitespace:
orig_data_size
compr_data_size
mem_used_total
mem_limit
mem_used_max
zero_pages
num_migrated
8) Deactivate:
swapoff /dev/zram0
umount /dev/zram1