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authorChristoph Hellwig <hch@lst.de>2022-04-20 07:27:13 +0300
committerJens Axboe <axboe@kernel.dk>2022-05-02 23:06:20 +0300
commit216889aad362b5b7e998a5371348b5e95d485dd1 (patch)
treec9e1e20f2cb9644e76c930019947804657362c5b /block/blk-cgroup.c
parentdb05628435aa761d30b4eae481a82befe7a8492a (diff)
downloadlinux-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.c20
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",