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| author | Michael Callahan <michaelcallahan@fb.com> | 2018-07-18 04:47:40 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-07-18 08:44:22 -0600 |
| commit | bdca3c87fb7ad1cc61d231d37eb0d8f90d001e0c (patch) | |
| tree | a5890cef3e0fb586f2a2b2a366423e71af96d821 /include/linux/genhd.h | |
| parent | ddcf35d397976421a4ec1d0d00fbcc027a8cb034 (diff) | |
| download | lwn-bdca3c87fb7ad1cc61d231d37eb0d8f90d001e0c.tar.gz lwn-bdca3c87fb7ad1cc61d231d37eb0d8f90d001e0c.zip | |
block: Track DISCARD statistics and output them in stat and diskstat
Add tracking of REQ_OP_DISCARD ios to the partition statistics and
append them to the various stat files in /sys as well as
/proc/diskstats. These are tracked with the same four stats as reads
and writes:
Number of discard ios completed.
Number of discard ios merged
Number of discard sectors completed
Milliseconds spent on discard requests
This is done via adding a new STAT_DISCARD define to genhd.h and then
using it to index that stat field for discard requests.
tj: Refreshed on top of v4.17 and other previous updates.
Signed-off-by: Michael Callahan <michaelcallahan@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Andy Newell <newella@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/genhd.h')
| -rw-r--r-- | include/linux/genhd.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/genhd.h b/include/linux/genhd.h index a75445446974..57864422a2c8 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -356,7 +356,8 @@ static inline void free_part_stats(struct hd_struct *part) #define part_stat_read_accum(part, field) \ (part_stat_read(part, field[STAT_READ]) + \ - part_stat_read(part, field[STAT_WRITE])) + part_stat_read(part, field[STAT_WRITE]) + \ + part_stat_read(part, field[STAT_DISCARD])) #define part_stat_add(cpu, part, field, addnd) do { \ __part_stat_add((cpu), (part), field, addnd); \ |