[PATCH 05/18] Maintain count of in flight requests for VQ_REQUEST queue

Vivek Goyal
2019-09-05T19:48:46Z

As of now we maintain this count only for VQ_HIPRIO. Maintain it for
VQ_REQUEST as well so that later it can be used to drain VQ_REQUEST
queue.

Signed-off-by: Vivek Goyal <vgoyal at redhat.com>
---
 fs/fuse/virtio_fs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index c46dd4d284d6..5df97dfee37d 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -360,6 +360,9 @@ static void virtio_fs_requests_done_work(struct work_struct
*work)
 		spin_unlock(&fpq->lock);

 		fuse_request_end(fc, req);
+		spin_lock(&fsvq->lock);
+		fsvq->in_flight--;
+		spin_unlock(&fsvq->lock);
 	}
 }

@@ -769,6 +772,7 @@ static int virtio_fs_enqueue_req(struct virtio_fs_vq *fsvq,
 		goto out;
 	}

+	fsvq->in_flight++;
 	notify = virtqueue_kick_prepare(vq);

 	spin_unlock(&fsvq->lock);
--
2.20.1