Patents by Inventor Todd J. Kjos

Todd J. Kjos has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Mapping an active entry within a hashed page table
    Patent number: 7765238
    Abstract: A method for mapping an active entry within a virtually hashed page table is disclosed. An active entry within a virtually hashed page table is populated. A link table for locating a link at an offset from an active entry is maintained. This link table continues to be maintained as a valid link table until an occupied head bucket threshold is exceeded or a collision has occurred.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: July 27, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Christophe De Dinechin, Todd J. Kjos, Jonathan K. Ross
  • Partially virtualizing an I/O device for use by virtual machines
    Patent number: 7613847
    Abstract: A computer system comprises a physical computer and a virtual machine monitor executable on the physical computer and configured to create an emulation of at least one guest operating system adapted to control the physical computer. The computer system further comprises a host executable on the physical computer that manages physical resources coupled to the physical computer on behalf of the virtual machine monitor and the at least one guest operating system. The host is adapted to virtualize a Peripheral Component Interconnect (PCI) configuration address space whereby the at least one guest operating system controls PCI input/output (I/O) devices directly and in absence of I/O emulation.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: November 3, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Todd J. Kjos, Jonathan K. Ross, Christophe De Dinechin
  • Mapping an active entry within a hashed page table
    Publication number: 20080270349
    Abstract: A method for mapping an active entry within a virtually hashed page table is disclosed. An active entry within a virtually hashed page table is populated. A link table for locating a link at an offset from an active entry is maintained. This link table continues to be maintained as a valid link table until an occupied head bucket threshold is exceeded or a collision has occurred.
    Type: Application
    Filed: April 30, 2007
    Publication date: October 30, 2008
    Inventors: Christophe De Dinechin, Todd J. Kjos, Jonathan K. Ross
  • Partially virtualizing an I/O device for use by virtual machines
    Publication number: 20080005297
    Abstract: A computer system comprises a physical computer and a virtual machine monitor executable on the physical computer and configured to create an emulation of at least one guest operating system adapted to control the physical computer. The computer system further comprises a host executable on the physical computer that manages physical resources coupled to the physical computer on behalf of the virtual machine monitor and the at least one guest operating system. The host is adapted to virtualize a Peripheral Component Interconnect (PCI) configuration address space whereby the at least one guest operating system controls PCI input/output (I/O) devices directly and in absence of I/O emulation.
    Type: Application
    Filed: May 16, 2006
    Publication date: January 3, 2008
    Inventors: Todd J. Kjos, Jonathan K. Ross, Christophe De Dinechin