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	partitions/aix: append null character to print data from disk	2018-07-27 09:17:41 -06:00
Kconfig	block: introduce blk-iolatency io controller	2018-07-09 09:07:54 -06:00
Kconfig.iosched	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Makefile	block: introduce blk-iolatency io controller	2018-07-09 09:07:54 -06:00
badblocks.c	badblocks: fix wrong return value in badblocks_set if badblocks are disabled	2017-11-03 11:29:50 -07:00
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	block, bfq: add/remove entity weights correctly	2018-07-09 09:07:52 -06:00
bfq-wf2q.c	block, bfq: improve code of bfq_bfqq_charge_time	2018-08-16 13:08:15 -06:00
bio-integrity.c	block: move bio_integrity_{intervals,bytes} into blkdev.h	2018-07-26 15:49:41 -06:00
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-mq-sched: remove unused 'can_block' arg from blk_mq_sched_insert_request	2018-01-17 09:49:21 -07:00
blk-flush.c	block: fix use-after-free in block flush handling	2018-06-09 06:37:14 -06:00
blk-integrity.c	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
blk-ioc.c	block, mm: remove unnecessary __GFP_HIGH flag	2018-07-09 09:07:54 -06:00
blk-iolatency.c	block: make iolatency avg_lat exponentially decay	2018-08-02 09:58:14 -06:00
blk-lib.c	block: fix infinite loop if the device loses discard capability	2018-07-09 09:07:54 -06:00
blk-map.c	Merge branch 'for-4.16/block' of git://git.kernel.dk/linux-block	2018-01-29 11:51:49 -08:00
blk-merge.c	block: don't use blocking queue entered for recursive bio submits	2018-06-02 20:35:00 -06:00
blk-mq-cpumap.c	blk-mq: don't keep offline CPUs mapped to hctx 0	2018-04-10 08:38:46 -06:00
blk-mq-debugfs-zoned.c	block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n	2018-07-09 09:07:52 -06:00
blk-mq-debugfs.c	blk-mq: dequeue request one by one from sw queue if hctx is busy	2018-07-09 09:07:53 -06:00
blk-mq-debugfs.h	block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n	2018-07-09 09:07:52 -06:00
blk-mq-pci.c	blk-mq: code clean-up by adding an API to clear set->mq_map	2018-07-09 09:07:53 -06:00
blk-mq-rdma.c	block: Add rdma affinity based queue mapping helper	2017-08-08 14:58:03 -04:00
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	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
blk-mq-tag.c	for-4.19/post-20180822	2018-08-22 13:38:05 -07:00
blk-mq-tag.h	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
blk-mq-virtio.c	blk-mq: provide a default queue mapping for virtio device	2017-02-27 20:54:05 +02:00
blk-mq.c	for-4.19/post-20180822	2018-08-22 13:38:05 -07:00
blk-mq.h	blk-mq: issue directly if hw queue isn't busy in case of 'none'	2018-07-17 16:04:00 -06:00
blk-rq-qos.c	blk-rq-qos: make depth comparisons unsigned	2018-07-22 11:30:53 -06:00
blk-rq-qos.h	blk-rq-qos: make depth comparisons unsigned	2018-07-22 11:30:53 -06:00
blk-settings.c	block: allow max_discard_segments to be stacked	2018-07-24 14:46:39 -06:00
blk-softirq.c	block: fix timeout changes for legacy request drivers	2018-06-19 11:27:18 -06:00
blk-stat.c	blk-stat: export helpers for modifying blk_rq_stat	2018-07-09 09:07:54 -06:00
blk-stat.h	blk-stat: export helpers for modifying blk_rq_stat	2018-07-09 09:07:54 -06:00
blk-sysfs.c	blk-wbt: don't maintain inflight counts if disabled	2018-08-23 09:34:46 -06:00
blk-tag.c	for-linus-20180616	2018-06-17 05:37:55 +09:00
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-mq: Fix timeout handling in case the timeout handler returns BLK_EH_DONE	2018-06-23 10:25:45 -06:00
blk-wbt.c	blk-wbt: remove dead code	2018-08-27 13:32:12 -06:00
blk-wbt.h	block: remove external dependency on wbt_flags	2018-07-09 09:07:54 -06:00
blk-zoned.c	block: Remove a superfluous cast from blkdev_report_zones()	2018-07-09 09:07:52 -06:00
blk.h	blk-mq: init hctx sched after update ctx and hctx mapping	2018-08-21 09:02:55 -06:00
bounce.c	block: unexport bio_clone_bioset	2018-07-24 14:43:26 -06:00
bsg-lib.c	block/bsg-lib: use PTR_ERR_OR_ZERO to simplify the flow path	2018-08-01 09:13:03 -06:00
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	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compat_ioctl.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
deadline-iosched.c	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
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	block: pass inclusive 'lend' parameter to truncate_inode_pages_range	2018-02-23 15:20:19 -07:00
ioprio.c	block: add ioprio_check_cap function	2018-05-31 10:50:54 -04:00
kyber-iosched.c	block: kyber: make kyber more friendly with merging	2018-05-30 10:47:40 -06:00
mq-deadline.c	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
noop-iosched.c	block: move existing elevator ops to union	2017-01-17 10:03:33 -07:00
opal_proto.h	block: sed-opal: Set MBRDone on S3 resume path if TPER is MBREnabled	2017-09-11 09:45:52 -06:00
partition-generic.c	block: use nanosecond resolution for iostat	2018-09-21 20:26:59 -06:00
scsi_ioctl.c	block: consistently use GFP_NOIO instead of __GFP_NORECLAIM	2018-05-14 08:55:18 -06:00
sed-opal.c	block: sed-opal: Fix a couple off by one bugs	2018-06-20 12:04:06 -06:00
t10-pi.c	block: move dif_prepare/dif_complete functions to block layer	2018-07-30 08:27:02 -06:00