Microsoft Technology Licensing, LLC

Martijn De Kort

Liang Yang

Matthew David Kurjanowicz

Murtaza Ghiya

Ravinder S Thind

Scott Chao-Chueh Lee

Darren Glen Moss

Monish Shantilal Shah

Yimin Deng

Lei Kou

Techniques of implementing software filtered non-volatile memory in a computing device are disclosed herein. In one embodiment, a method includes detecting an entry being written to a guest admin submission queue (gASQ) by a memory driver of a virtual machine hosted on the computing device. Upon detecting the entry written to the gASQ by the memory driver, the command in the entry is analyzed to determine whether the command is allowed based on a list of allowed or disallowed commands. In response to determining that the command in the entry is not allowed, without sending the command to the non-volatile memory, generating an execution result of the command in response to the entry being written to the gASQ by the memory driver. As such, potentially harmful commands from the memory driver are prevented from being executed by the non-volatile memory.

Software filtered memory devices in computing systems

The disclosed technologies provide functionality for non-volatile memory device-assisted live migration of virtual machine ('VM') data. A host computing device (the “host”) requests that a source non-volatile memory device track changes to a namespace by a VM. In response thereto, the source device tracks changes made by the VM to the namespace and stores one or more data structures that identify the changed portions of the namespace. The host requests the data structures from the source device and requests the contents of the changed portions from the source device. The host then causes the data changed by the VM in the namespace to be written to a namespace on a target non-volatile memory device. The host can also retrieve the device internal state of a child physical function on the source device. The host migrates the retrieved device internal state to a child physical function on the target device.

Non-volatile memory device-assisted live migration of virtual machine data

A method and a host processing device are provided for background formatting, or de-icing, an optical medium with no de-icing assistance from an optical drive upon which the optical medium is mounted. In a foreground mode, an optical medium may be initially formatted, volume structures may be recorded on the optical medium, file system information may be written thereto, and quick grow formatting may be performed to make the optical medium writable, at least sequentially. Under initiation and control of a file system, executing on a host processing device, the optical medium may be formatted, or de-iced, in a background mode with no assistance from an optical drive, upon which the optical medium is mounted. Under control of the file system, blocked input or output activity, may be allowed to access the optical medium upon pausing the formatting, or de-icing.

Host initiated background formatting of optical medium

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Martijn De Kort