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| author |   Paolo Valente <paolo.valente@linaro.org> | 2020-02-03 11:40:56 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2020-02-03 06:58:15 -0700 |
| commit | ecedd3d7e19911ab8fe42f17b77c0a30fe7f4db3 (patch) | |
| tree | 604e9e103322c6b4708d9fcf8ecd2e24be6c92e8 /block/bfq-iosched.c | |
| parent | block, bfq: do not insert oom queue into position tree (diff) | |
| download | wireguard-linux-ecedd3d7e19911ab8fe42f17b77c0a30fe7f4db3.tar.xz wireguard-linux-ecedd3d7e19911ab8fe42f17b77c0a30fe7f4db3.zip | |
block, bfq: get extra ref to prevent a queue from being freed during a group move
In bfq_bfqq_move(), the bfq_queue, say Q, to be moved to a new group
may happen to be deactivated in the scheduling data structures of the
source group (and then activated in the destination group). If Q is
referred only by the data structures in the source group when the
deactivation happens, then Q is freed upon the deactivation.
This commit addresses this issue by getting an extra reference before
the possible deactivation, and releasing this extra reference after Q
has been moved.
Tested-by: Chris Evich <cevich@redhat.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bfq-iosched.c')
0 files changed, 0 insertions, 0 deletions