1 files changed, 14 insertions, 0 deletions

diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
index e0f071f6b5a7..63d197724519 100644
--- a/fs/btrfs/async-thread.c
+++ b/fs/btrfs/async-thread.c
@@ -86,6 +86,20 @@ btrfs_work_owner(struct btrfs_work *work)
         return work->wq->fs_info;
 }
 
+bool btrfs_workqueue_normal_congested(struct btrfs_workqueue *wq)
+{
+        /*
+         * We could compare wq->normal->pending with num_online_cpus()
+         * to support "thresh == NO_THRESHOLD" case, but it requires
+         * moving up atomic_inc/dec in thresh_queue/exec_hook. Let's
+         * postpone it until someone needs the support of that case.
+         */
+        if (wq->normal->thresh == NO_THRESHOLD)
+                return false;
+
+        return atomic_read(&wq->normal->pending) > wq->normal->thresh * 2;
+}
+
 BTRFS_WORK_HELPER(worker_helper);
 BTRFS_WORK_HELPER(delalloc_helper);
 BTRFS_WORK_HELPER(flush_delalloc_helper);