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block, bfq: turn put_queue into release_process_ref in __bfq_bic_change_cgroup

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commit c8997736650060594845e42c5d01d3118aec8d25 upstream.

A bfq_put_queue() may be invoked in __bfq_bic_change_cgroup(). The
goal of this put is to release a process reference to a bfq_queue. But
process-reference releases may trigger also some extra operation, and,
to this goal, are handled through bfq_release_process_ref(). So, turn
the invocation of bfq_put_queue() into an invocation of
bfq_release_process_ref().

Tested-by: [email protected]
Signed-off-by: Paolo Valente <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Paolo Valente 2020-03-21 10:45:19 +01:00 • committed by Greg Kroah-Hartman
commit ad749ca022
3 changed files with 2 additions and 6 deletions
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5
block/bfq-cgroup.c
View file

@ -697,10 +697,7 @@ static struct bfq_group *__bfq_bic_change_cgroup(struct bfq_data *bfqd,
if (entity->sched_data != &bfqg->sched_data) {
bic_set_bfqq(bic, NULL, 0);
bfq_log_bfqq(bfqd, async_bfqq,
"bic_change_group: %p %d",
async_bfqq, async_bfqq->ref);
bfq_put_queue(async_bfqq);
bfq_release_process_ref(bfqd, async_bfqq);
}
}

2
block/bfq-iosched.c
View file

@ -2717,8 +2717,6 @@ static void bfq_bfqq_save_state(struct bfq_queue *bfqq)
}
}
static
void bfq_release_process_ref(struct bfq_data *bfqd, struct bfq_queue *bfqq)
{
/*

1
block/bfq-iosched.h
View file

@ -950,6 +950,7 @@ void bfq_bfqq_expire(struct bfq_data *bfqd, struct bfq_queue *bfqq,
bool compensate, enum bfqq_expiration reason);
void bfq_put_queue(struct bfq_queue *bfqq);
void bfq_end_wr_async_queues(struct bfq_data *bfqd, struct bfq_group *bfqg);
void bfq_release_process_ref(struct bfq_data *bfqd, struct bfq_queue *bfqq);
void bfq_schedule_dispatch(struct bfq_data *bfqd);
void bfq_put_async_queues(struct bfq_data *bfqd, struct bfq_group *bfqg);