Paolo Valente effbffc91d block, bfq: put async queues for root bfq groups too ... [ Upstream commit 52257ffbfc ] For each pair [device for which bfq is selected as I/O scheduler, group in blkio/io], bfq maintains a corresponding bfq group. Each such bfq group contains a set of async queues, with each async queue created on demand, i.e., when some I/O request arrives for it. On creation, an async queue gets an extra reference, to make sure that the queue is not freed as long as its bfq group exists. Accordingly, to allow the queue to be freed after the group exited, this extra reference must released on group exit. The above holds also for a bfq root group, i.e., for the bfq group corresponding to the root blkio/io root for a given device. Yet, by mistake, the references to the existing async queues of a root group are not released when the latter exits. This causes a memory leak when the instance of bfq for a given device exits. In a similar vein, bfqg_stats_xfer_dead is not executed for a root group. This commit fixes bfq_pd_offline so that the latter executes the above missing operations for a root group too. Reported-by: Holger Hoffstätte <holger@applied-asynchrony.com> Reported-by: Guoqing Jiang <gqjiang@suse.com> Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com> Signed-off-by: Davide Ferrari <davideferrari8@gmail.com> Signed-off-by: Paolo Valente <paolo.valente@linaro.org> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-04-12 12:32:19 +02:00
..
partitions	partitions/msdos: Unable to mount UFS 44bsd partitions	2018-04-08 14:26:28 +02:00
Kconfig	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
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	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
badblocks.c	badblocks: fix wrong return value in badblocks_set if badblocks are disabled	2017-12-20 10:10:26 +01:00
bfq-cgroup.c	block, bfq: put async queues for root bfq groups too	2018-04-12 12:32:19 +02:00
bfq-iosched.c	block,bfq: Disable writeback throttling	2017-12-25 14:26:26 +01:00
bfq-iosched.h	Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block	2017-09-07 11:59:42 -07:00
bfq-wf2q.c	block, bfq: guarantee update_next_in_service always returns an eligible entity	2017-08-31 08:20:31 -06:00
bio-integrity.c	Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block	2017-09-07 11:59:42 -07:00
bio.c	Fix slab name "biovec-(1<<(21-12))"	2018-04-08 14:26:33 +02:00
blk-cgroup.c	blkcg: avoid free blkcg_root when failed to alloc blkcg policy	2017-08-25 13:51:07 -06:00
blk-core.c	block: fix the count of PGPGOUT for WRITE_SAME	2018-03-08 22:41:05 -08:00
blk-exec.c	block: introduce new block status code type	2017-06-09 09:27:32 -06:00
blk-flush.c	block: update comments to reflect REQ_FLUSH -> REQ_PREFLUSH rename	2017-08-25 10:36:54 -06:00
blk-integrity.c	block: switch bios to blk_status_t	2017-06-09 09:27:32 -06:00
blk-ioc.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-lib.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-map.c	blk_rq_map_user_iov: fix error override	2018-02-25 11:07:49 +01:00
blk-merge.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-mq-cpumap.c	blk-mq: map queues to all present CPUs	2017-07-24 10:01:31 -06:00
blk-mq-debugfs.c	blk-mq-debugfs: fix device sched directory for default scheduler	2017-10-03 15:58:55 -06:00
blk-mq-debugfs.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-mq-pci.c	blk-mq-pci: add a fallback when pci_irq_get_affinity returns NULL	2017-08-18 08:08:14 -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-sched: dispatch from scheduler IFF progress is made in ->dispatch	2017-12-20 10:10:27 +01:00
blk-mq-sched.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-mq-sysfs.c	blk-mq: untangle debugfs and sysfs	2017-05-04 08:24:13 -06:00
blk-mq-tag.c	blk-mq: Make blk_mq_reinit_tagset() calls easier to read	2017-08-18 08:36:58 -06:00
blk-mq-tag.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
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	blk-mq: fix kernel oops in blk_mq_tag_idle()	2018-04-12 12:32:19 +02:00
blk-mq.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-settings.c	block: Warn if blk_queue_rq_timed_out() is called for a blk-mq queue	2017-08-23 12:02:30 -06:00
blk-softirq.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-stat.c	blk-stat: don't use this_cpu_ptr() in a preemptable section	2017-05-10 07:40:18 -06:00
blk-stat.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-sysfs.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-tag.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-throttle.c	block-throttle: avoid double charge	2017-12-29 17:53:47 +01:00
blk-timeout.c	block: Fix a race between blk_cleanup_queue() and timeout handling	2017-11-30 08:40:52 +00:00
blk-wbt.c	blk-wbt: account flush requests correctly	2018-02-22 15:42:29 +01:00
blk-wbt.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
blk-zoned.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
blk.h	block: drain queue before waiting for q_usage_counter becoming zero	2018-03-03 10:24:35 +01:00
bounce.c	block: don't let passthrough IO go into .make_request_fn()	2018-01-02 20:31:05 +01:00
bsg-lib.c	bsg-lib: fix use-after-free under memory-pressure	2017-10-04 08:35:04 -06:00
bsg.c	bsg: remove #if 0'ed code	2017-08-29 10:50:30 -06:00
cfq-iosched.c	block/cfq: cache rightmost rb_node	2017-09-08 18:26:49 -07:00
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, scheduler: convert xxx_var_store to void	2017-08-28 10:01:08 -06:00
elevator.c	block: fix warning when I/O elevator is changed as request_queue is being removed	2017-08-28 10:52:44 -06:00
genhd.c	Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block	2017-09-07 11:59:42 -07:00
ioctl.c	block: remove the discard_zeroes_data flag	2017-04-08 11:25:38 -06:00
ioprio.c	block: Add fallthrough markers to switch statements	2017-06-21 11:46:07 -06:00
kyber-iosched.c	block: kyber: fix domain token leak during requeue	2018-03-08 22:41:05 -08:00
mq-deadline.c	mq-deadline: Enable auto-loading when built as module	2017-08-29 10:47:23 -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	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
scsi_ioctl.c	block: Change argument type of scsi_req_init()	2017-06-20 19:27:14 -06:00
sed-opal.c	block: sed-opal: Set MBRDone on S3 resume path if TPER is MBREnabled	2017-09-11 09:45:52 -06:00
t10-pi.c	t10-pi: Move opencoded contants to common header	2017-07-03 16:56:25 -06:00