Patents by Inventor Laszlo Ersek

Laszlo Ersek 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).

  • Dirty page tracking of guest-uncached memory
    Patent number: 9817689
    Abstract: An example method of providing a dirty bitmap to an application includes receiving a request for a snapshot of an internal dirty bitmap. The internal dirty bitmap indicates whether a guest has updated one or more pages in guest memory since a previously received request for a snapshot of the internal dirty bitmap. The method also includes copying a set of bits of the internal dirty bitmap into a shared dirty bitmap, which is accessible by the hypervisor and application. The method further includes for each bit of the set of bits having a first value, setting the respective bit to a second value. The method also includes invalidating all cache lines in a set of pages corresponding to one or more bits having the first value in the shared dirty bitmap. The method further includes after invalidating the cache lines, providing the shared dirty bitmap to the application.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: November 14, 2017
    Assignee: Red Hat, Inc.
    Inventors: Paolo Bonzini, Laszlo Ersek, Jonathan Masters
  • Dirty Page Tracking of Guest-Uncached Memory
    Publication number: 20160253197
    Abstract: An example method of providing a dirty bitmap to an application includes receiving a request for a snapshot of an internal dirty bitmap. The internal dirty bitmap indicates whether a guest has updated one or more pages in guest memory since a previously received request for a snapshot of the internal dirty bitmap. The method also includes copying a set of bits of the internal dirty bitmap into a shared dirty bitmap, which is accessible by the hypervisor and application. The method further includes for each bit of the set of bits having a first value, setting the respective bit to a second value. The method also includes invalidating all cache lines in a set of pages corresponding to one or more bits having the first value in the shared dirty bitmap. The method further includes after invalidating the cache lines, providing the shared dirty bitmap to the application.
    Type: Application
    Filed: February 27, 2015
    Publication date: September 1, 2016
    Inventors: Paolo Bonzini, Laszlo Ersek, Jonathan Masters