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-rw-r--r--doc/guides/sample_app_ug/vhost.rst9
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/guides/sample_app_ug/vhost.rst b/doc/guides/sample_app_ug/vhost.rst
index 9112e789..fd42cb3f 100644
--- a/doc/guides/sample_app_ug/vhost.rst
+++ b/doc/guides/sample_app_ug/vhost.rst
@@ -158,6 +158,10 @@ when disabling VLAN strip. Such feature, which heavily depends on hardware,
should be removed from this example to reduce confusion. Now, VLAN strip is
enabled and cannot be disabled.
+**--builtin-net-driver**
+A very simple vhost-user net driver which demonstrates how to use the generic
+vhost APIs will be used when this option is given. It is disabled by default.
+
Common Issues
-------------
@@ -192,3 +196,8 @@ Common Issues
according to the NIC's property. ::
make EXTRA_CFLAGS="-DMAX_QUEUES=320"
+
+* Option "builtin-net-driver" is incompatible with QEMU
+
+ QEMU vhost net device start will fail if protocol feature is not negotiated.
+ DPDK virtio-user pmd can be the replacement of QEMU.