Paolo Valente 52257ffbfc block, bfq: put async queues for root bfq groups too ... 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>		2018-01-09 08:45:25 -07:00
..
partitions	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	2017-11-03 11:29:50 -07:00
bfq-cgroup.c	block, bfq: put async queues for root bfq groups too	2018-01-09 08:45:25 -07:00
bfq-iosched.c	block, bfq: remove batches of confusing ifdefs	2018-01-05 09:32:59 -07:00
bfq-iosched.h	block, bfq: let a queue be merged only shortly after starting I/O	2018-01-05 09:26:09 -07:00
bfq-wf2q.c	block, bfq: let a queue be merged only shortly after starting I/O	2018-01-05 09:26:09 -07:00
bio-integrity.c	block: remove unnecessary NULL checks in bioset_integrity_free()	2017-10-06 13:03:12 -06:00
bio.c	block: move bio_alloc_pages() to bcache	2018-01-06 09:18:00 -07:00
blk-cgroup.c	blkcg: add sanity check for blkcg policy operations	2017-11-04 12:31:15 -06:00
blk-core.c	blk-mq: quiesce queue before freeing queue	2018-01-06 09:25:36 -07:00
blk-exec.c	block: introduce new block status code type	2017-06-09 09:27:32 -06:00
blk-flush.c	blk-mq: don't allocate driver tag upfront for flush rq	2017-11-04 12:40:13 -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	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
blk-map.c	Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-11-17 12:08:18 -08:00
blk-merge.c	block: blk-merge: remove unnecessary check	2018-01-06 09:18:00 -07:00
blk-mq-cpumap.c	blk-mq: map queues to all present CPUs	2017-07-24 10:01:31 -06:00
blk-mq-debugfs.c	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
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: remove confusing comment of blk_mq_sched_dispatch_requests	2018-01-05 08:36:33 -07:00
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: improve heavily contended tag case	2017-12-22 11:09:37 -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	blk-mq: fix kernel oops in blk_mq_tag_idle()	2018-01-09 08:39:31 -07:00
blk-mq.h	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
blk-settings.c	block: remove __bio_kmap_atomic	2017-11-10 19:53:25 -07:00
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	treewide: setup_timer() -> timer_setup()	2017-11-21 15:57:07 -08:00
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	blk-sysfs: remove NULL pointer checking in queue_wb_lat_store	2017-11-23 22:00:17 -07:00
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	treewide: setup_timer() -> timer_setup()	2017-11-21 15:57:07 -08:00
blk-timeout.c	block: Fix a race between blk_cleanup_queue() and timeout handling	2017-10-30 13:28:10 -06:00
blk-wbt.c	blk-wbt: fix comments typo	2017-11-23 22:00:20 -07:00
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: introduce zoned block devices zone write locking	2018-01-05 09:22:17 -07:00
blk.h	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
bounce.c	block: bounce: don't access bio->bi_io_vec in copy_to_high_bio_irq	2018-01-06 09:18:00 -07:00
bsg-lib.c	bsg-lib: fix use-after-free under memory-pressure	2017-10-04 08:35:04 -06:00
bsg.c	block: pass full fmode_t to blk_verify_command	2017-11-10 19:53:25 -07:00
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	deadline-iosched: Introduce zone locking support	2018-01-05 09:22:17 -07:00
elevator.c	blk-mq: quiesce queue during switching io sched and updating nr_requests	2018-01-06 09:25:36 -07:00
genhd.c	block: genhd.c: fix message typo	2017-11-19 11:02:19 -07:00
ioctl.c	block: move CAP_SYS_ADMIN check in blkdev_roset()	2017-10-25 12:25:00 -06:00
ioprio.c	block: Add fallthrough markers to switch statements	2017-06-21 11:46:07 -06:00
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
kyber-iosched.c	block: kyber: check if there are requests in ctx in kyber_has_work()	2017-11-01 08:20:02 -06:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mq-deadline.c	mq-deadline: make it clear that __dd_dispatch_request() works on all hw queues	2018-01-06 09:23:11 -07:00
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: pass full fmode_t to blk_verify_command	2017-11-10 19:53:25 -07:00
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