International Business Machines Corporation

Michael James Vance

David Anthony Larson

Stuart Zachary Jacobs

Justin King

David A Larson Stanton

James Long

A computing device, a non-transitory computer readable storage medium, and a method are provided for automatically recreating lost storage volumes. A volume command including volume metadata associated with a storage volume of an SCM storage device is received. The volume metadata is stored at another storage device that is less volatile than the SCM storage device. The storage volume is configured in accordance with the volume command including forwarding the volume command to an SCM device driver. A notification of a persistence loss at the SCM storage device is received subsequent to forwarding the volume command. The volume metadata is retrieved from the other storage device subsequent to receiving notification of the persistence loss. The storage volume is automatically re-configured in accordance with the volume command including submitting the retrieved volume metadata to the SCM device driver.

Automatically recreating lost storage volumes

Systems, methods, and computer program products to perform an operation comprising processing a first logical partition on a shared processor for the duration of a dispatch cycle, issuing, by a hypervisor, at a predefined time prior to completion of the dispatch cycle, a lightweight hypervisor decrementer (HDEC) interrupt, and responsive to the lightweight HDEC interrupt, initiating an asynchronous hardware operation on the shared processor prior to completion of the dispatch cycle.

Using a decrementer interrupt to start long-running hardware operations before the end of a shared processor dispatch cycle

Systems, methods, and computer program products to perform an operation, the operation comprising processing a first logical partition on a shared processor for the duration of a dispatch cycle, issuing, by a hypervisor, at a predefined time prior to completion of the dispatch cycle, a lightweight hypervisor decrementer (HDEC) interrupt specifying a cache line address buffer location in a virtual processor, and responsive to the lightweight HDEC, writing, by the shared processor, a set of cache line addresses used by the first logical partition to the cache line address buffer location in the virtual processor.

Method to perform an operation, the operation comprising processing a first logical partition on a shared processor for the duration of a dispatch cycle, issuing, by a hypervisor, at a predefined time prior to completion of the dispatch cycle, a lightweight hypervisor decrementer (HDEC) interrupt specifying a cache line address buffer location in a virtual processor, and responsive to the lightweight HDEC, writing, by the shared processor, a set of cache line addresses used by the first logical partition to the cache line address buffer location in the virtual processor.

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Rochester, MN, United States of America

Michael James Vance