Signed-off-by: Yong Wang <wang.yon...@zte.com.cn> --- doc/guides/prog_guide/vhost_lib.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/doc/guides/prog_guide/vhost_lib.rst b/doc/guides/prog_guide/vhost_lib.rst index 4f997d4..f0862e6 100644 --- a/doc/guides/prog_guide/vhost_lib.rst +++ b/doc/guides/prog_guide/vhost_lib.rst @@ -95,7 +95,7 @@ The following is an overview of the Vhost API functions: * for VM2NIC case, the ``nb_tx_desc`` has to be small enough: <= 64 if virtio indirect feature is not enabled and <= 128 if it is enabled. - The is because when dequeue zero copy is enabled, guest Tx used vring will + This is because when dequeue zero copy is enabled, guest Tx used vring will be updated only when corresponding mbuf is freed. Thus, the nb_tx_desc has to be small enough so that the PMD driver will run out of available Tx descriptors and free mbufs timely. Otherwise, guest Tx vring would be -- 1.8.3.1