diff options
| author | Christoph Hellwig <hch@lst.de> | 2022-04-20 07:27:13 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-05-02 23:06:20 +0300 |
| commit | 216889aad362b5b7e998a5371348b5e95d485dd1 (patch) | |
| tree | c9e1e20f2cb9644e76c930019947804657362c5b /block/blk-cgroup.c | |
| parent | db05628435aa761d30b4eae481a82befe7a8492a (diff) | |
| download | linux-216889aad362b5b7e998a5371348b5e95d485dd1.tar.xz | |
blk-cgroup: move blk_cgroup_congested out line
There is no urgent need to inline this function, so move it out of line.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20220420042723.1010598-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-cgroup.c')
| -rw-r--r-- | block/blk-cgroup.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 8dfe62786cd5..97266ebde975 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -1950,6 +1950,26 @@ void blk_cgroup_bio_start(struct bio *bio) put_cpu(); } +bool blk_cgroup_congested(void) +{ + struct cgroup_subsys_state *css; + bool ret = false; + + rcu_read_lock(); + css = kthread_blkcg(); + if (!css) + css = task_css(current, io_cgrp_id); + while (css) { + if (atomic_read(&css->cgroup->congestion_count)) { + ret = true; + break; + } + css = css->parent; + } + rcu_read_unlock(); + return ret; +} + static int __init blkcg_init(void) { blkcg_punt_bio_wq = alloc_workqueue("blkcg_punt_bio", |