Search International and National Patent Collections

1. (WO2018200559) SILENT ACTIVE PAGE MIGRATION FAULTS

Pub. No.:    WO/2018/200559    International Application No.:    PCT/US2018/029188
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Wed Apr 25 01:59:59 CEST 2018
IPC: G06F 12/1009
Applicants: ADVANCED MICRO DEVICES, INC
ATI TECHNOLOGIES ULC
Inventors: SMITH, Wade K.
ASARO, Anthony
Title: SILENT ACTIVE PAGE MIGRATION FAULTS
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.