US 10,769,074 B2Granted

Computer memory content movement

AssigneeMicrosoft Technology Licensing, LLC

InventorsJohn G. Bennett, Marc Tremblay

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Abstract

In some examples, computer memory content movement may include ascertaining a request associated with content of computer memory. Based on a determination that the request is directed to the content that is to be moved from a source of the computer memory to a destination of the computer memory, a determination may be made as to whether the content is at the source, is in a process of being moved from the source to the destination, or has been moved from the source to the destination. Based on a determination that the content is at the source, the request may be performed using the source. Based on a determination that the content is in the process of being moved, the request may be performed using the source. Further, based on a determination that the content has been moved, the request may be performed using the destination.

Claims18

Dependent claims

An apparatus comprising:

a processor;
and
a memory storing machine readable instructions that when executed by the processor cause the processor to:
ascertain a request associated with content of computer memory;
determine whether the request is directed to the content that is to be moved from a source of the computer memory to a destination of the computer memory by
determining, based on an analysis of a map page table, whether the request is directed to the content that is to be moved from the source to the destination, wherein the map page table includes an indication of whether the content is located at the source, is located at the destination, or is to be moved from the source to the destination;
based on a determination that the request is directed to the content that is to be moved from the source to the destination, initiate a reflective copy operation to begin a reflective copy of the content from the source to the destination, and determine whether the content is at the source, is in a process of being moved from the source to the destination, or has been moved from the source to the destination;
based on a determination that the content is at the source, perform the request associated with the content using the source;
update, at the beginning of the reflective copy, the map page table to direct guest access to an address of a controller associated with the reflective copy operation, and based on a determination that the content is in the process of being moved from the source to the destination, perform, using the controller, the request associated with the content using the source;
modify, upon completion of the reflective copy operation, the map page table to direct the guest access from the address of the controller associated with the reflective copy operation to the destination, and based on a determination that the content has been moved from the source to the destination, perform the request associated with the content using the destination;
and
reset the controller associated with the reflective copy operation to begin a new reflective copy operation.

9 more elements

A computer implemented method comprising:

ascertaining, by at least one processor, a request associated with content of computer memory;
determining, by the at least one processor and based on an analysis of a map page table, whether the request is directed to the content that is to be moved from a source of the computer memory to a destination of the computer memory, wherein the map page table includes an indication of whether the content is located at the source, at the destination, or is to be moved from the source to the destination;
based on a determination that the request is directed to the content that is to be moved from the source to the destination, initiating a reflective copy operation to begin a reflective copy of the content from the source to the destination, and determining, by the at least one processor, whether the content is at the source, is in a process of being moved from the source to the destination, or has been moved from the source to the destination;
based on a determination that the content is at the source, performing, by the at least one processor, the request associated with the content using the source;
updating, at the beginning of the reflective copy, the map page table to direct guest access to an address of a controller associated with the reflective copy operation, and based on a determination that the content is in the process of being moved from the source to the destination, performing, by the at least one processor, using the controller, the request associated with the content using the source;
and
modifying, upon completion of the reflective copy operation, the map page table to direct the guest access from the address of the controller associated with the reflective copy operation to the destination, and based on a determination that the content has been moved from the source to the destination, performing, by the at least one processor, the request associated with the content using the destination.

4 more elements

A non-transitory computer readable medium having stored thereon machine readable instructions, the machine readable instructions, when executed by a processor, cause the processor to:

ascertain a request associated with content of computer memory;
determine, from the request, a logical address associated with the content;
determine, based on the logical address and based on an analysis of a map page table, whether the request is directed to the content that is to be moved from a source of the computer memory to a destination of the computer memory, wherein the map page table includes an indication of whether the content is located at the source, at the destination, or is to be moved from the source to the destination;
based on a determination that the request is directed to the content that is to be moved from the source to the destination, initiate a reflective copy operation to begin a reflective copy of the content from the source to the destination, and determine, based on the logical address, whether the content is at the source, is in a process of being moved from the source to the destination, or has been moved from the source to the destination;
based on a determination that the content is at the source, perform, based on mapping of the logical address to a source physical address assigned to the content, the request associated with the content using the source;
update, at the beginning of the reflective copy, the map page table to direct guest access to an address of a controller associated with the reflective copy operation, and based on a determination that the content is in the process of being moved from the source to the destination, perform, using the controller and based on mapping of the logical address to the source physical address assigned to the content, the request associated with the content using the source;
and
modify, upon completion of the reflective copy operation, the map page table to direct the guest access from the address of the controller associated with the reflective copy operation to the destination, and based on a determination that the content has been moved from the source to the destination, perform, based on mapping of the logical address to a destination physical address assigned to the content, the request associated with the content using the destination,
wherein the source physical address and the destination physical address are different from the logical address.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/984,238Filed 18 May 2018 · us provisional application
Priority: 9 Nov 2017
Published: US 2019/0138453 A19 May 2019
Granted: 8 Sep 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G06F 12/10
In hierarchically structured memory systems, e.g. virtual memory systems: address translation
G06F 12/1009
Address translation: using page tables, e.g. page table structures
G06F 12/1036
Using associative or pseudo-associative address translation means, e.g. translation look-aside buffer [TLB]: for multiple virtual address spaces,…
G06F 12/109
Address translation: for multiple virtual address spaces, e.g. segmentation

Family

Application62/583,942Us provisional application · filed 9 Nov 2017
US 2019/0138453 A1Pre-grant publication · published 9 May 2019
US 10,769,074 B2This patent

From the US filing history. Foreign family members aren’t listed.

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