From: Linhaifeng <haifeng....@huawei.com>
If we found there is no buffer we should notify virtio_net to
fill buffers.
We use mz send buffers from VM to VM,found that the other VM
stop to receive data after many hours.
Signed-off-by: Linhaifeng <haifeng.lin at huawei.com>
---
lib/librte_vhost/vhost_rxtx.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
index ccfd82f..013c526 100644
--- a/lib/librte_vhost/vhost_rxtx.c
+++ b/lib/librte_vhost/vhost_rxtx.c
@@ -87,9 +87,14 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
/*check that we have enough buffers*/
if (unlikely(count > free_entries))
count = free_entries;
-
- if (count == 0)
+ /* If there is no buffers we should notify guest to fill.
+ * This is need when guest use virtio_net driver(not pmd).
+ */
+ if (count == 0) {
+ if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
+ eventfd_write((int)vq->kickfd, 1);
return 0;
+ }
res_end_idx = res_base_idx + count;
/* vq->last_used_idx_res is atomically updated. */
--
1.9.0
