Omar Sandoval b57e99b4b8 block: use nanosecond resolution for iostat ... Klaus Kusche reported that the I/O busy time in /proc/diskstats was not updating properly on 4.18. This is because we started using ktime to track elapsed time, and we convert nanoseconds to jiffies when we update the partition counter. However, this gets rounded down, so any I/Os that take less than a jiffy are not accounted for. Previously in this case, the value of jiffies would sometimes increment while we were doing I/O, so at least some I/Os were accounted for. Let's convert the stats to use nanoseconds internally. We still report milliseconds as before, now more accurately than ever. The value is still truncated to 32 bits for backwards compatibility. Fixes: 522a777566 ("block: consolidate struct request timestamp fields") Cc: stable@vger.kernel.org Reported-by: Klaus Kusche <klaus.kusche@computerix.info> Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2018-09-21 20:26:59 -06:00
..
partitions
badblocks.c
bfq-cgroup.c	block: bfq: swap puts in bfqg_and_blkg_put	2018-09-06 11:32:58 -06:00
bfq-iosched.c	block, bfq: reduce write overcharge	2018-08-16 13:08:13 -06:00
bfq-iosched.h
bfq-wf2q.c	block, bfq: improve code of bfq_bfqq_charge_time	2018-08-16 13:08:15 -06:00
bio-integrity.c
bio.c	block: use nanosecond resolution for iostat	2018-09-21 20:26:59 -06:00
blk-cgroup.c	blk-cgroup: increase number of supported policies	2018-09-11 10:59:53 -06:00
blk-core.c	block: use nanosecond resolution for iostat	2018-09-21 20:26:59 -06:00
blk-exec.c
blk-flush.c
blk-integrity.c
blk-ioc.c
blk-iolatency.c
blk-lib.c
blk-map.c
blk-merge.c
blk-mq-cpumap.c
blk-mq-debugfs-zoned.c
blk-mq-debugfs.c
blk-mq-debugfs.h
blk-mq-pci.c
blk-mq-rdma.c
blk-mq-sched.c	blk-mq: init hctx sched after update ctx and hctx mapping	2018-08-21 09:02:55 -06:00
blk-mq-sched.h	blk-mq: init hctx sched after update ctx and hctx mapping	2018-08-21 09:02:55 -06:00
blk-mq-sysfs.c
blk-mq-tag.c	for-4.19/post-20180822	2018-08-22 13:38:05 -07:00
blk-mq-tag.h
blk-mq-virtio.c
blk-mq.c	for-4.19/post-20180822	2018-08-22 13:38:05 -07:00
blk-mq.h
blk-rq-qos.c
blk-rq-qos.h
blk-settings.c
blk-softirq.c
blk-stat.c
blk-stat.h
blk-sysfs.c	blk-wbt: don't maintain inflight counts if disabled	2018-08-23 09:34:46 -06:00
blk-tag.c
blk-throttle.c	blkcg: use tryget logic when associating a blkg with a bio	2018-08-31 14:48:58 -06:00
blk-timeout.c
blk-wbt.c	blk-wbt: remove dead code	2018-08-27 13:32:12 -06:00
blk-wbt.h
blk-zoned.c
blk.h	blk-mq: init hctx sched after update ctx and hctx mapping	2018-08-21 09:02:55 -06:00
bounce.c
bsg-lib.c
bsg.c	block: bsg: move atomic_t ref_count variable to refcount API	2018-08-27 19:17:02 -06:00
cfq-iosched.c	cfq: Suppress compiler warnings about comparisons	2018-08-07 17:57:13 -06:00
cmdline-parser.c
compat_ioctl.c
deadline-iosched.c
elevator.c	block: remove unnecessary condition check	2018-08-27 19:16:06 -06:00
genhd.c	block: use nanosecond resolution for iostat	2018-09-21 20:26:59 -06:00
ioctl.c
ioprio.c
Kconfig
Kconfig.iosched
kyber-iosched.c
Makefile
mq-deadline.c
noop-iosched.c
opal_proto.h
partition-generic.c	block: use nanosecond resolution for iostat	2018-09-21 20:26:59 -06:00
scsi_ioctl.c
sed-opal.c
t10-pi.c