Paolo Valente 9dee8b3b05 block, bfq: fix queue removal from weights tree ... bfq maintains an ordered list, through a red-black tree, of unique weights of active bfq_queues. This list is used to detect whether there are active queues with differentiated weights. The weight of a queue is removed from the list when both the following two conditions become true: (1) the bfq_queue is flagged as inactive (2) the has no in-flight request any longer; Unfortunately, in the rare cases where condition (2) becomes true before condition (1), the removal fails, because the function to remove the weight of the queue (bfq_weights_tree_remove) is rightly invoked in the path that deactivates the bfq_queue, but mistakenly invoked *before* the function that actually performs the deactivation (bfq_deactivate_bfqq). This commits moves the invocation of bfq_weights_tree_remove for condition (1) to after bfq_deactivate_bfqq. As a consequence of this move, it is necessary to add a further reference to the queue when the weight of a queue is added, because the queue might otherwise be freed before bfq_weights_tree_remove is invoked. This commit adds this reference and makes all related modifications. Signed-off-by: Paolo Valente <paolo.valente@linaro.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2019-01-31 12:50:24 -07:00
..
partitions
badblocks.c
bfq-cgroup.c
bfq-iosched.c	block, bfq: fix queue removal from weights tree	2019-01-31 12:50:24 -07:00
bfq-iosched.h	block, bfq: consider also ioprio classes in symmetry detection	2019-01-31 12:50:23 -07:00
bfq-wf2q.c	block, bfq: fix queue removal from weights tree	2019-01-31 12:50:24 -07:00
bio-integrity.c
bio.c
blk-cgroup.c
blk-core.c	Revert "block: cover another queue enter recursion via BIO_QUEUE_ENTERED"	2019-01-27 06:35:28 -07:00
blk-exec.c
blk-flush.c
blk-integrity.c
blk-ioc.c
blk-iolatency.c
blk-lib.c
blk-map.c
blk-merge.c	Revert "block: cover another queue enter recursion via BIO_QUEUE_ENTERED"	2019-01-27 06:35:28 -07:00
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-sched.h
blk-mq-sysfs.c
blk-mq-tag.c
blk-mq-tag.h
blk-mq-virtio.c
blk-mq.c
blk-mq.h
blk-pm.c
blk-pm.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-throttle.c
blk-timeout.c
blk-wbt.c
blk-wbt.h
blk-zoned.c
blk.h
bounce.c
bsg-lib.c
bsg.c
cmdline-parser.c
compat_ioctl.c
elevator.c
genhd.c
ioctl.c
ioprio.c
Kconfig
Kconfig.iosched
kyber-iosched.c
Makefile
mq-deadline.c
opal_proto.h
partition-generic.c
scsi_ioctl.c
sed-opal.c
t10-pi.c