]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
block, bfq: get a ref to a group when adding it to a service tree
authorPaolo Valente <paolo.valente@linaro.org>
Mon, 3 Feb 2020 10:40:59 +0000 (11:40 +0100)
committerJens Axboe <axboe@kernel.dk>
Mon, 3 Feb 2020 13:58:15 +0000 (06:58 -0700)
commitdb37a34c563bf4692b36990ae89005c031385e52
treecf3b9bf508cb90dc60cfed10d4c27600c218e556
parent4d8340d0d4d90e7ca367d18ec16c2fefa89a339c
block, bfq: get a ref to a group when adding it to a service tree

BFQ schedules generic entities, which may represent either bfq_queues
or groups of bfq_queues. When an entity is inserted into a service
tree, a reference must be taken, to make sure that the entity does not
disappear while still referred in the tree. Unfortunately, such a
reference is mistakenly taken only if the entity represents a
bfq_queue. This commit takes a reference also in case the entity
represents a group.

Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Tested-by: Chris Evich <cevich@redhat.com>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/bfq-cgroup.c
block/bfq-iosched.h
block/bfq-wf2q.c