After commit
dfd6200a0954 ("blk-cgroup: support to track if policy is
online"), there is no need to do this again in bfq.
However, 'pd->online' is not protected by 'bfqd->lock', in order to make
sure bfq won't see that 'pd->online' is still set after bfq_pd_offline(),
clear it before bfq_pd_offline() is called. This is fine because other
polices doesn't use 'pd->online' and bfq_pd_offline() will move active
bfqq to root cgroup anyway.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230202134913.2364549-1-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
bfqg->bfqd = bfqd;
bfqg->active_entities = 0;
bfqg->num_queues_with_pending_reqs = 0;
- bfqg->online = true;
bfqg->rq_pos_tree = RB_ROOT;
}
continue;
}
bfqg = blkg_to_bfqg(blkg);
- if (bfqg->online) {
+ if (bfqg->pd.online) {
bio_associate_blkg_from_css(bio, &blkg->blkcg->css);
return bfqg;
}
put_async_queues:
bfq_put_async_queues(bfqd, bfqg);
- bfqg->online = false;
spin_unlock_irqrestore(&bfqd->lock, flags);
/*
/* reference counter (see comments in bfq_bic_update_cgroup) */
refcount_t ref;
- /* Is bfq_group still online? */
- bool online;
struct bfq_entity entity;
struct bfq_sched_data sched_data;
struct blkcg_policy *pol = blkcg_policy[i];
if (blkg->pd[i] && blkg->pd[i]->online) {
+ blkg->pd[i]->online = false;
if (pol->pd_offline_fn)
pol->pd_offline_fn(blkg->pd[i]);
- blkg->pd[i]->online = false;
}
}