Boris Burkov ef45fe470e blk-cgroup: show global disk stats in root cgroup io.stat ... In order to improve consistency and usability in cgroup stat accounting, we would like to support the root cgroup's io.stat. Since the root cgroup has processes doing io even if the system has no explicitly created cgroups, we need to be careful to avoid overhead in that case. For that reason, the rstat algorithms don't handle the root cgroup, so just turning the file on wouldn't give correct statistics. To get around this, we simulate flushing the iostat struct by filling it out directly from global disk stats. The result is a root cgroup io.stat file consistent with both /proc/diskstats and io.stat. Note that in order to collect the disk stats, we needed to iterate over devices. To facilitate that, we had to change the linkage of a disk_type to external so that it can be used from blk-cgroup.c to iterate over disks. Suggested-by: Tejun Heo <tj@kernel.org> Signed-off-by: Boris Burkov <boris@bur.io> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2020-07-17 20:18:00 -06:00
..
partitions	block: always remove partitions from blk_drop_partitions()	2020-07-15 09:23:42 -06:00
badblocks.c
bfq-cgroup.c	block, bfq: invoke flush_idle_tree after reparent_active_queues in pd_offline	2020-03-21 14:31:03 -06:00
bfq-iosched.c	blk-mq: remove the bio argument to ->prepare_request	2020-05-29 10:23:24 -06:00
bfq-iosched.h	block, bfq: turn put_queue into release_process_ref in __bfq_bic_change_cgroup	2020-03-21 14:31:00 -06:00
bfq-wf2q.c	block, bfq: get a ref to a group when adding it to a service tree	2020-02-03 06:58:15 -07:00
bio-integrity.c	block/bio-integrity: don't free 'buf' if bio_integrity_add_page() failed	2020-06-02 17:21:50 -06:00
bio.c	block: rename generic_make_request to submit_bio_noacct	2020-07-01 07:27:24 -06:00
blk-cgroup-rwstat.c	blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT	2019-11-07 12:28:13 -07:00
blk-cgroup-rwstat.h	blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT	2019-11-07 12:28:13 -07:00
blk-cgroup.c	blk-cgroup: show global disk stats in root cgroup io.stat	2020-07-17 20:18:00 -06:00
blk-core.c	block: remove a bogus warning in __submit_bio_noacct_mq	2020-07-07 11:45:59 -06:00
blk-crypto-fallback.c	block: rename generic_make_request to submit_bio_noacct	2020-07-01 07:27:24 -06:00
blk-crypto-internal.h	block: blk-crypto-fallback for Inline Encryption	2020-05-14 09:48:03 -06:00
blk-crypto.c	block: rename generic_make_request to submit_bio_noacct	2020-07-01 07:27:24 -06:00
blk-exec.c	block: add a blk_account_io_merge_bio helper	2020-05-27 05:21:23 -06:00
blk-flush.c	block: defer flush request no matter whether we have elevator	2020-07-17 07:14:28 -06:00
blk-integrity.c	block: Make blk-integrity preclude hardware inline encryption	2020-05-14 09:48:03 -06:00
blk-ioc.c	block: remove retry loop in ioc_release_fn()	2020-07-16 10:22:15 -06:00
blk-iocost.c	blk-iocost: Use struct_size() in kzalloc_node()	2020-06-24 09:15:58 -06:00
blk-iolatency.c	blk-iolatency: only call ktime_get() if needed	2020-07-01 08:02:38 -06:00
blk-lib.c	block: improve discard bio alignment in __blkdev_issue_discard()	2020-07-17 07:15:10 -06:00
blk-map.c	block: Inline encryption support for blk-mq	2020-05-14 09:47:53 -06:00
blk-merge.c	block: rename generic_make_request to submit_bio_noacct	2020-07-01 07:27:24 -06:00
blk-mq-cpumap.c
blk-mq-debugfs-zoned.c
blk-mq-debugfs.c	blk-mq: remove pointless call of list_entry_rq() in hctx_show_busy_rq()	2020-07-01 07:25:36 -06:00
blk-mq-debugfs.h
blk-mq-pci.c
blk-mq-rdma.c
blk-mq-sched.c	blk-mq: Remove unnecessary local variable	2020-07-10 07:58:09 -06:00
blk-mq-sched.h
blk-mq-sysfs.c	blk-mq: make sure that line break can be printed	2019-11-04 07:14:10 -07:00
blk-mq-tag.c	blk-mq: move blk_mq_get_driver_tag into blk-mq.c	2020-06-30 12:57:59 -06:00
blk-mq-tag.h	blk-mq: centralise related handling into blk_mq_get_driver_tag	2020-07-08 16:06:42 -06:00
blk-mq-virtio.c	blk-mq: Fix typo in comment	2020-03-17 20:55:21 +01:00
blk-mq.c	blk-mq: remove redundant validation in __blk_mq_end_request()	2020-07-10 07:58:33 -06:00
blk-mq.h	Revert "blk-mq: put driver tag when this request is completed"	2020-07-01 22:58:32 -06:00
blk-pm.c	block: bypass blk_set_runtime_active for uninitialized q->dev	2019-09-12 07:11:56 -06:00
blk-pm.h
blk-rq-qos.c	Revert "blk-rq-qos: remove redundant finish_wait to rq_qos_wait."	2020-07-15 09:33:37 -06:00
blk-rq-qos.h	blk-rq-qos: fix first node deletion of rq_qos_del()	2019-10-15 10:13:13 -06:00
blk-settings.c	block: Introduce REQ_OP_ZONE_APPEND	2020-05-12 20:36:28 -06:00
blk-stat.c	blk-stat: Optimise blk_stat_add()	2019-10-07 21:19:10 -06:00
blk-stat.h
blk-sysfs.c	block: create the request_queue debugfs_dir on registration	2020-06-24 09:15:58 -06:00
blk-throttle.c	block: rename generic_make_request to submit_bio_noacct	2020-07-01 07:27:24 -06:00
blk-timeout.c	block: make blk_timeout_init() static	2020-07-17 07:13:42 -06:00
blk-wbt.c	blk-wbt: rename __wbt_update_limits to wbt_update_limits	2020-05-29 16:30:39 -06:00
blk-wbt.h	blk-wbt: remove wbt_update_limits	2020-05-29 16:30:39 -06:00
blk-zoned.c	block: Modify revalidate zones	2020-05-12 20:36:28 -06:00
blk.h	block: improve discard bio alignment in __blkdev_issue_discard()	2020-07-17 07:15:10 -06:00
bounce.c	block: rename generic_make_request to submit_bio_noacct	2020-07-01 07:27:24 -06:00
bsg-lib.c	blk-mq: move failure injection out of blk_mq_complete_request	2020-06-24 09:15:57 -06:00
bsg.c	compat_ioctl: bsg: add handler	2020-01-03 09:33:21 +01:00
cmdline-parser.c
elevator.c	Merge branch 'for-linus' into for-5.5/block	2019-11-07 12:27:19 -07:00
genhd.c	blk-cgroup: show global disk stats in root cgroup io.stat	2020-07-17 20:18:00 -06:00
ioctl.c	block: Fix type of first compat_put_{,u}long() argument	2020-05-19 09:40:29 -06:00
ioprio.c
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Kconfig.iosched	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
keyslot-manager.c	block: Make blk-integrity preclude hardware inline encryption	2020-05-14 09:48:03 -06:00
kyber-iosched.c	blk-mq: remove the bio argument to ->prepare_request	2020-05-29 10:23:24 -06:00
Makefile	blk-mq: merge blk-softirq.c into blk-mq.c	2020-06-24 09:15:56 -06:00
mq-deadline.c	blk-mq: remove the bio argument to ->prepare_request	2020-05-29 10:23:24 -06:00
opal_proto.h	block: sed-opal: Change the check condition for regular session validity	2020-03-12 08:00:10 -06:00
scsi_ioctl.c	scsi: core: Allow non-root users to perform ZBC commands	2020-03-16 18:26:31 -04:00
sed-opal.c	block: sed-opal: Change the check condition for regular session validity	2020-03-12 08:00:10 -06:00
t10-pi.c	block: Allow t10-pi to be modular	2020-01-06 20:59:04 -07:00