Method for speeding up page table address update on virtual...

Details Method for speeding up page table address update on virtual... Method for speeding up page table address update on virtual...

2007-01-10

2010-06-08

Elmore, Reba I (Department: 2189)

Electrical computers and digital processing systems: memory

Address formation

Address mapping

C711S212000, C711S220000

Reexamination Certificate

active

07734893

ABSTRACT:
A method is provided which eliminates redundancy from the shadow PT operation performed by the virtual machine monitor (VMM) when the guest operating system running on a virtual machine updates a guest page table (PT) address. The VMM associates a plurality of shadow PTs with guest PTs and allocates their relation in memory. When it detects the update of a guest PT address, the VMM searches for a shadow PT corresponding to the updated guest PT. If the associated shadow PT exists, the VMM omits rewriting the shadow PT and registers the address of the shadow PT with the central processing unit (CPU). If the associated shadow PT does not exist, the VMM allocates a memory, creates a shadow PT, registers an address of the created shadow PT with the CPU, and records a relationship between the updated guest PT and the generated shadow PT.

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