DYNAMIC MEMORY ALLOCATION

• US 20150127916A1
• Filed: 04/25/2012
• Published: 05/07/2015
• Est. Priority Date: 04/25/2012
• Status: Abandoned Application

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Kani, Toshimitsu
• Application Number:
  US14/396,383
• Publication Number:
  US 20150127916A1
• Time in Patent Office: Days
• US Class Current: 711/153
• CPC Class Codes: G06F 12/0223 User address space allocation, e.g. contiguous or non contiguous base addressing
• CPC Class Codes: G06F 12/0292 using tables or multilevel address translation means G06F12/023 takes precedence; address translation in virtual memory systems G06F12/10
• CPC Class Codes: G06F 2009/45562 Creating, deleting, cloning virtual machine instances
• CPC Class Codes: G06F 2009/45566 Nested virtual machines
• CPC Class Codes: G06F 2009/45583 Memory management, e.g. access or allocation
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0644 Management of space entities, e.g. partitions, extents, pools
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: G06F 9/45558 Hypervisor-specific management and integration aspects
• CPC Class Codes: G06F 9/5016 the resource being the memory

Abstract

A method includes calling a function of a memory class object to cause access to a value in a memory table of the memory class object so as to dynamically allocate a memory for access by an operating system. The memory class object represents the memory. The value corresponds to a property of a memory slice selected from a plurality of memory slices into which the memory is partitioned.

Claims

1. A method comprising calling a function of a memory class object to cause access to a value in a memory table of the memory class object so as to dynamically allocate a memory for access by an operating system, the memory class object representing the memory, and the value corresponding to a property of a memory slice selected from a plurality of memory slices into which the memory is partitioned.

2. The method of claim 1, wherein the operating system is an operating system of a virtual machine, and wherein the memory is configured to be shared by a plurality of virtual machines.

3. The method of claim 1, wherein the value indicates whether or not the selected memory slice is accessible by the operating system.

4. The method of claim 3, wherein calling the function to cause access to the value comprises causing a change in the value to dynamically add the selected memory slice.

5. The method of claim 3, wherein calling the function to cause access to the value comprises causing a change in the value to dynamically eject the selected memory slice.

6. The method of claim 1, wherein calling the function to cause access to the value comprises obtaining a representation of the memory table.

7. The method of claim 1, wherein calling the function to cause access to the value comprises changing the value to indicate that the selected memory slice is not ejectable.

8. The method of claim 1, wherein calling the function to cause access to the value comprises requesting a host system to provide access to the value.

9. A non-transitory computer readable storage medium having stored thereon instructions that when executed by a processor will cause the processor to perform the method of:

accessing a memory class object, the object representing a memory, the object including a memory table that includes a plurality of values, each value indicating a property of each memory slice of a corresponding plurality of memory slices of the memory, the object including a function that is callable to enable access to a value of said plurality of values;

calling the function to cause access a value of said plurality of values that corresponds to a selected memory slice of said plurality of memory slices.

10. The non-transitory computer readable storage medium of claim 9, wherein calling the function comprises causing access to the value to dynamically add the selected memory slice.

11. The non-transitory computer readable storage medium of claim 9, wherein calling the function comprises causing access to the value to dynamically eject the selected memory slice.

12. The non-transitory computer readable storage medium of claim 11, wherein the method further comprises calling a function of the memory class object to move data from the selected memory slice to another accessible memory slice prior to dynamically ejecting the selected memory slice.

13. The non-transitory computer readable storage medium of claim 9, wherein calling the function comprises accessing a representation of the memory table.

14. A system comprising:

a memory;

a processing unit in communication with a computer readable medium, wherein the computer readable medium contains a set of instructions wherein the processing unit is designed to carry out the set of instructions to;

create a memory class object that represents the memory, the object including a memory table that includes a plurality of values, each value indicating a property of each memory slice of a corresponding plurality of memory slices of the represented memory, the object including a function that is callable to enable access to a value of said plurality of values, the memory class object including a hardware identifier that identifies the memory as being partitionable into slices that are capable of dynamic allocation, and including a compatible identifier that identifies the memory as a memory;

access the memory class object;

in the event that the hardware identifier is recognizable, call the function to cause access a value of said plurality of values that corresponds to a selected memory slice of said plurality of memory slices;

in the event that the hardware identifier is not recognizable, access the compatible identifier to identify the memory.

15. The system of claim 14, wherein the processing unit is a processing unit of a host system, the host system being configured to host a plurality of virtual machines, wherein an operating system of each virtual machine is configured to carry out the set of instructions.