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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 /Documentation/admin-guide | |
| parent | block: Add and use op_stat_group() for indexing disk_stat fields. (diff) | |
| download | linux-dev-bdca3c87fb7ad1cc61d231d37eb0d8f90d001e0c.tar.xz linux-dev-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 'Documentation/admin-guide')
0 files changed, 0 insertions, 0 deletions