Invention Grant
- Patent Title: Silent active page migration faults
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Application No.: US15495296Application Date: 2017-04-24
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Publication No.: US10365824B2Publication Date: 2019-07-30
- Inventor: Wade K. Smith , Anthony Asaro
- Applicant: Advanced Micro Devices, Inc. , ATI Technologies ULC
- Applicant Address: US CA Santa Clara CA Markham
- Assignee: Advanced Micro Devices, Inc.,ATI Technologies ULC
- Current Assignee: Advanced Micro Devices, Inc.,ATI Technologies ULC
- Current Assignee Address: US CA Santa Clara CA Markham
- Agency: Meyertons Hood Kivlin Kowert and Goetzel PC
- Agent Rory D. Rankin
- Main IPC: G06F3/06
- IPC: G06F3/06 ; G06F12/1009 ; G06F12/1027

Abstract:
Systems, apparatuses, and methods for migrating memory pages are disclosed herein. In response to detecting that a migration of a first page between memory locations is being initiated, a first page table entry (PTE) corresponding to the first page is located and a migration pending indication is stored in the first PTE. In one embodiment, the migration pending indication is encoded in the first PTE by disabling read and write permissions. If a translation request targeting the first PTE is received by the MMU and the translation request corresponds to a read request, a read operation is allowed to the first page. Otherwise, if the translation request corresponds to a write request, a write operation to the first page is blocked and a silent retry request is generated and conveyed to the requesting client.
Public/Granted literature
- US20180307414A1 SILENT ACTIVE PAGE MIGRATION FAULTS Public/Granted day:2018-10-25
Information query