Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / fs / btrfs / async-thread.c

diff --git a/kernel/fs/btrfs/async-thread.c b/kernel/fs/btrfs/async-thread.c
index 9aba42b..a09264d 100644 (file)
--- a/kernel/fs/btrfs/async-thread.c
+++ b/kernel/fs/btrfs/async-thread.c
@@ -70,6 +70,20 @@ void btrfs_##name(struct work_struct *arg)                           \
        normal_work_helper(work);                                       \
 }
 
+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);