Implicit locks in a shared virtual memory system

Details Implicit locks in a shared virtual memory system Implicit locks in a shared virtual memory system

2006-03-29

2008-08-05

Elmore, Reba I (Department: 2189)

Electrical computers and digital processing systems: memory

Address formation

Address mapping

C711S210000, C711S208000

Reexamination Certificate

active

07409525

ABSTRACT:
A technique coordinates access to shared data on a remote device from a local device having local physical memory. The technique involves observing a page table entry (PTE) on the remote device. The PTE is stored in a page table used for managing virtual to physical address translations and handling page faults between semiconductor memory and magnetic disk drive memory on the remote device. The technique further involves blocking access to the shared data from the local device when the PTE indicates that shared data corresponding to the PTE is in use on the remote device. The technique further involves moving the shared data into the local physical memory from the semiconductor memory of the remote device, and providing access to the shared data in the local physical memory when the PTE indicates that shared data corresponding to the PTE is not in use on the remote device.

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Clark, Roy, et al., U.S. Appl. No. 11/393,174, filed on Mar. 29, 2006, entitled “Sub-Page-Granular Cache Coherency Using Shared Virtual Memory Mechanism”.
Clark, Roy, et al., U.S. Appl. No. 11/393,438, filed on Mar. 29, 2006, entitled “Techniques for Mirroring Data Within a Shared Virtual Memory System”.

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