[QNX Hypervisor 2.2 User Manual]Column Directory Navigation

Provide a standard VIRTIO interface for block devices.

One, syntax

vdev virtio-blk options

Second, options

2.1 delayed seconds|forever

If this option is specified, delays opening the device in the host until it is first referenced by the guest.

If no device is found in the host, continue trying for the specified number of seconds (eg delayed 5) before timing out.If seconds is set to 0 (ie delayed 0).Attempt to find the device in host only once.If the parameter is set to "forever" (that is, delayed forever), it will keep trying to find the device in the host without a timeout.

2.2 dio enable|disable

Configure whether to use direct I/O when processing guest requests.Set to enable to activate on read and write requests.The default setting is disable, which means that Direct I/O is not used by default.

If a Director I/O access fails at any time (whether not supported by the backend driver or for other reasons), the device will permanently switch back to using _IO_READ and _IO_WRITE messages.

2.3 hostdev [<]host_filename

Provide the name of the hosts file to be used for device content.

The "<" identifier before host_filename indicates that the device content will be forced to be read-only&