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authorMichael Callahan <michaelcallahan@fb.com>2018-07-18 04:47:40 -0700
committerJens Axboe <axboe@kernel.dk>2018-07-18 08:44:22 -0600
commitbdca3c87fb7ad1cc61d231d37eb0d8f90d001e0c (patch)
treea5890cef3e0fb586f2a2b2a366423e71af96d821 /block/partition-generic.c
parentddcf35d397976421a4ec1d0d00fbcc027a8cb034 (diff)
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 'block/partition-generic.c')
-rw-r--r--block/partition-generic.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/block/partition-generic.c b/block/partition-generic.c
index 0ddb06722162..5a8975a1201c 100644
--- a/block/partition-generic.c
+++ b/block/partition-generic.c
@@ -130,7 +130,8 @@ ssize_t part_stat_show(struct device *dev,
return sprintf(buf,
"%8lu %8lu %8llu %8u "
"%8lu %8lu %8llu %8u "
- "%8u %8u %8u"
+ "%8u %8u %8u "
+ "%8lu %8lu %8llu %8u"
"\n",
part_stat_read(p, ios[STAT_READ]),
part_stat_read(p, merges[STAT_READ]),
@@ -142,7 +143,11 @@ ssize_t part_stat_show(struct device *dev,
jiffies_to_msecs(part_stat_read(p, ticks[STAT_WRITE])),
inflight[0],
jiffies_to_msecs(part_stat_read(p, io_ticks)),
- jiffies_to_msecs(part_stat_read(p, time_in_queue)));
+ jiffies_to_msecs(part_stat_read(p, time_in_queue)),
+ part_stat_read(p, ios[STAT_DISCARD]),
+ part_stat_read(p, merges[STAT_DISCARD]),
+ (unsigned long long)part_stat_read(p, sectors[STAT_DISCARD]),
+ jiffies_to_msecs(part_stat_read(p, ticks[STAT_DISCARD])));
}
ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr,