Hewlett-packard Development Company, L.P.

Muppirala Kishore Kumar

Paulose Kuriakose Arackal

Harish S Babu

Ryan Ray Houdek

Michael Wisner

Jean-Marc P Eurin

Shoba Iyer

Anand Ananthabhotia

Adiseshan Muthugopalakrishnan, Iii

Chetham Seshadri

David M Caswell

Harish K

Bahudhanam Shyam Prasad

Suresh Venkatasubbaiah

The present invention relates to methods for managing memory. More particularly, but not exclusively, the present invention relates to methods for managing memory across a plurality of partitions. A first method is disclosed which allocates memory across a plurality of partitions and includes the steps of: establishing a pool of free memory; allocating some of the free memoryto a target partition when required; identifying memorywithin one or more source partitions to replace the allocated free memory; cleaningthe identified memory; and adding the cleaned memory to the pool. A second method for allocating memory across a plurality of partitions is also disclosed. The second method includes the steps of: monitoring the workloads of each partition; identifying memoryfrom a lesser-loaded source partition to transfer to a free memory pool; cleaningthe identified memory; transferring the cleaned memory to the free memory pool; and allocating memoryfrom the free memory pool to a target partition when required. Systems and computer software for managing memory are also disclosed.

Method and system for managing memory

A method and apparatus is disclosed for managing storage used by a processor when processing instructions in which an estimate of register usage for program procedures or functions is generated and used to control the storage of the register bank in memory.

Method and apparatus for managing storage used by a processor when processing instructions

A method is provided of managing hardware triggered hotplug operations of one or more input/output (I/O) cards of a computer system. The method comprises receiving hardware triggers, each of which relates to a hotplug operation to be carried out on an I/O card associated with a card slot, placing the hardware triggers in a queue, and processing the queue of hardware triggers. The method further comprises processing one or more of said hardware triggers. This comprises analysing a hardware trigger to determine the card slot to which said hardware trigger relates, and consulting a hotplug operation policy to determine whether hotplug operations are enabled for said card slot. If hotplug operations are not enabled for said card slot, this further comprises ignoring said hardware trigger, and if hotplug operations are enabled for said card slot, this further comprise querying said slot to determine whether it contains a card. If said card slot does not contain a card, this further comprises ignoring said hardware trigger, and if said card slot does contain a card, determining the nature of the hotplug operation of said hardware trigger. If said hotplug operation is a delete card hotplug operation or a suspend card hotplug operation, this further comprises determining whether said card is essential or non-essential to said computer system, and ignoring said delete card hotplug operation or said suspend card hotplug operation when said card is essential, and performing said delete card hotplug operation or said suspend card hotplug operation when said card is non-essential. If said hotplug operation is an add card hotplug operation or a resume card hotplug operation, this further comprises performing said add card hotplug operation or said resume card hotplug operation.

System and method for the management of hardware triggered hotplug operations of input/output cards

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Bengaluru, India

Muppirala Kishore Kumar