VHOST_SET_FEATURES   25 include/uapi/linux/vhost.h #define VHOST_SET_FEATURES	_IOW(VHOST_VIRTIO, 0x00, __u64)
VHOST_SET_FEATURES   25 tools/include/uapi/linux/vhost.h #define VHOST_SET_FEATURES	_IOW(VHOST_VIRTIO, 0x00, __u64)