2 files changed, 12 insertions, 1 deletions

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 3ad22beb24c2..ebc36f525eee 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -224,6 +224,10 @@ static void request_end(struct fuse_conn *fc, struct fuse_req *req)
                         fc->blocked = 0;
                         wake_up_all(&fc->blocked_waitq);
                 }
+                if (fc->num_background == FUSE_CONGESTION_THRESHOLD) {
+                        clear_bdi_congested(&fc->bdi, READ);
+                        clear_bdi_congested(&fc->bdi, WRITE);
+                }
                 fc->num_background--;
         }
         spin_unlock(&fc->lock);
@@ -378,6 +382,10 @@ static void request_send_nowait(struct fuse_conn *fc, struct fuse_req *req)
                 fc->num_background++;
                 if (fc->num_background == FUSE_MAX_BACKGROUND)
                         fc->blocked = 1;
+                if (fc->num_background == FUSE_CONGESTION_THRESHOLD) {
+                        set_bdi_congested(&fc->bdi, READ);
+                        set_bdi_congested(&fc->bdi, WRITE);
+                }
 
                 queue_request(fc, req);
                 spin_unlock(&fc->lock);
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 68ae87cbafab..9f4603beb9e8 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -20,7 +20,10 @@
 #define FUSE_MAX_PAGES_PER_REQ 32
 
 /** Maximum number of outstanding background requests */
-#define FUSE_MAX_BACKGROUND 10
+#define FUSE_MAX_BACKGROUND 12
+
+/** Congestion starts at 75% of maximum */
+#define FUSE_CONGESTION_THRESHOLD (FUSE_MAX_BACKGROUND * 75 / 100)
 
 /** It could be as large as PATH_MAX, but would that have any uses? */
 #define FUSE_NAME_MAX 1024