Patents by Inventor Wade B. Ouren
Wade B. Ouren 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).
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Patent number: 8327083Abstract: Transparent hypervisor pinning of critical memory areas is provided for a shared memory partition data processing system. The transparent hypervisor pinning includes receiving at a hypervisor a hypervisor call initiated by a logical partition to register a logical memory area of the logical partition with the hypervisor. Responsive to this hypervisor call, the hypervisor transparently determines whether the logical memory is a critical memory area for access by the hypervisor. If the logical memory area is a critical memory area, then the hypervisor automatically pins the logical memory area to physical memory of the shared memory partition data processing system, thereby ensuring that the memory area will not be paged-out from physical memory to external storage, and thus ensuring availability of the logic memory area to the hypervisor.Type: GrantFiled: January 6, 2012Date of Patent: December 4, 2012Assignee: International Business Machines CorporationInventors: Stuart Z. Jacobs, David A. Larson, Naresh Nayar, Wade B. Ouren
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Patent number: 8327086Abstract: Migration management is provided for a shared memory logical partition migrating from a source system to a target system. The management approach includes managing migration of the logical partition from the source system to the target system by: transferring a portion of logical partition state information for the migrating logical partition from the source system to the target system by copying at the source system contents of a logical page of the migrating logical partition into a state record buffer for forwarding to the target system; forwarding the state record buffer to the target system; and determining whether the migrating logical partition is suspended at the source system, and if not, copying at the target system contents of the state record buffer to paging storage of the target system, the paging storage being external to physical memory managed by a hypervisor of the target system.Type: GrantFiled: January 6, 2012Date of Patent: December 4, 2012Assignee: International Business Machines CorporationInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Kenneth C. Vossen
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Patent number: 8312230Abstract: Dynamic control of memory affinity is provided for a shared memory logical partition within a shared memory partition data processing system having a plurality of nodes. The memory affinity control approach includes: determining one or more home node assignments for the shared memory logical partition, with each assigned home node being one node of the plurality of nodes of the system; determining a desired physical page level per node for the shared memory logical partition; and allowing the shared memory partition to run and using the home node assignment(s) and its desired physical page level(s) in the dispatching of tasks to physical processors in the nodes and in hypervisor page memory management to dynamically control memory affinity of the shared memory logical partition in the data processing system.Type: GrantFiled: March 13, 2009Date of Patent: November 13, 2012Assignee: International Business Machines CorporationInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Patent number: 8285915Abstract: Relocating data in a virtualized environment maintained by a hypervisor administering access to memory with a Cache Page Table (‘CPT’) and a Physical Page Table (‘PPT’), the CPT and PPT including virtual to physical mappings. Relocating data includes converting the virtual to physical mappings of the CPT to virtual to logical mappings; establishing a Logical Memory Block (‘LMB’) relocation tracker that includes logical addresses of an LMB, source physical addresses of the LMB, target physical addresses of the LMB, a translation block indicator for each relocation granule, and a pin count associated with each relocation granule; establishing a PPT entry tracker including PPT entries corresponding to the LMB to be relocated; relocating the LMB in a number of relocation granules including blocking translations to the relocation granules during relocation; and removing the logical addresses from the LMB relocation tracker.Type: GrantFiled: January 13, 2010Date of Patent: October 9, 2012Assignee: International Business Machines CorporationInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Publication number: 20120110276Abstract: Migration management is provided for a shared memory logical partition migrating from a source system to a target system. The management approach includes managing migration of the logical partition from the source system to the target system by: transferring a portion of logical partition state information for the migrating logical partition from the source system to the target system by copying at the source system contents of a logical page of the migrating logical partition into a state record buffer for forwarding to the target system; forwarding the state record buffer to the target system; and determining whether the migrating logical partition is suspended at the source system, and if not, copying at the target system contents of the state record buffer to paging storage of the target system, the paging storage being external to physical memory managed by a hypervisor of the target system.Type: ApplicationFiled: January 6, 2012Publication date: May 3, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Kenneth C. Vossen
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Publication number: 20120110273Abstract: Transparent hypervisor pinning of critical memory areas is provided for a shared memory partition data processing system. The transparent hypervisor pinning includes receiving at a hypervisor a hypervisor call initiated by a logical partition to register a logical memory area of the logical partition with the hypervisor. Responsive to this hypervisor call, the hypervisor transparently determines whether the logical memory is a critical memory area for access by the hypervisor. If the logical memory area is a critical memory area, then the hypervisor automatically pins the logical memory area to physical memory of the shared memory partition data processing system, thereby ensuring that the memory area will not be paged-out from physical memory to external storage, and thus ensuring availability of the logic memory area to the hypervisor.Type: ApplicationFiled: January 6, 2012Publication date: May 3, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Stuart Z. JACOBS, David A. LARSON, Naresh NAYAR, Wade B. OUREN
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Patent number: 8171236Abstract: Migration management is provided for a shared memory logical partition migrating from a source system to a target system. The management approach includes managing migration of the logical partition from the source system to the target system by: transferring a portion of logical partition state information for the migrating logical partition from the source system to the target system by copying at the source system contents of a logical page of the migrating logical partition into a state record buffer for forwarding to the target system; forwarding the state record buffer to the target system; and determining whether the migrating logical partition is suspended at the source system, and if not, copying at the target system contents of the state record buffer to paging storage of the target system, the paging storage being external to physical memory managed by a hypervisor of the target system.Type: GrantFiled: March 13, 2009Date of Patent: May 1, 2012Assignee: International Business Machines CorporationInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Kenneth C. Vossen
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Publication number: 20120079230Abstract: In an embodiment, a target number of discretionary pages is calculated for a first partition. If the target number of discretionary pages for the first partition is less than a number of the discretionary pages that are allocated to the first partition, a result page is found that is allocated to the first partition and the result page is deallocated from the first partition. If the target number of discretionary pages for the first partition is greater than the number of the discretionary pages that are allocated to the first partition, a free page is allocated to the first partition.Type: ApplicationFiled: November 30, 2011Publication date: March 29, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Patent number: 8127086Abstract: Transparent hypervisor pinning of critical memory areas is provided for a shared memory partition data processing system. The transparent hypervisor pinning includes receiving at a hypervisor a hypervisor call initiated by a logical partition to register a logical memory area of the logical partition with the hypervisor. Responsive to this hypervisor call, the hypervisor transparently determines whether the logical memory is a critical memory area for access by the hypervisor. If the logical memory area is a critical memory area, then the hypervisor automatically pins the logical memory area to physical memory of the shared memory partition data processing system, thereby ensuring that the memory area will not be paged-out from physical memory to external storage, and thus ensuring availability of the logic memory area to the hypervisor.Type: GrantFiled: March 13, 2009Date of Patent: February 28, 2012Assignee: International Business Machines CorporationInventors: Stuart Z. Jacobs, David A. Larson, Naresh Nayar, Wade B. Ouren
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Patent number: 8090911Abstract: In an embodiment, a target number of discretionary pages for a first partition is calculated as a function of a number of physical page table faults, a number of sampled page faults, a number of shared physical page pool faults, a number of re-page-ins, and a ratio of pages. If the target number of discretionary pages for the first partition is less than a number of the discretionary pages that are allocated to the first partition, a result page is found that is allocated to the first partition and the result page is deallocated from the first partition. If the target number of discretionary pages for the first partition is greater than the number of the discretionary pages that are allocated to the first partition, a free page is allocated to the first partition.Type: GrantFiled: April 16, 2009Date of Patent: January 3, 2012Assignee: International Business Machines CorporationInventors: Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Publication number: 20110173370Abstract: Relocating data in a virtualized environment maintained by a hypervisor administering access to memory with a Cache Page Table (‘CPT’) and a Physical Page Table (‘PPT’), the CPT and PPT including virtual to physical mappings. Relocating data includes converting the virtual to physical mappings of the CPT to virtual to logical mappings; establishing a Logical Memory Block (‘LMB’) relocation tracker that includes logical addresses of an LMB, source physical addresses of the LMB, target physical addresses of the LMB, a translation block indicator for each relocation granule, and a pin count associated with each relocation granule; establishing a PPT entry tracker including PPT entries corresponding to the LMB to be relocated; relocating the LMB in a number of relocation granules including blocking translations to the relocation granules during relocation; and removing the logical addresses from the LMB relocation tracker.Type: ApplicationFiled: January 13, 2010Publication date: July 14, 2011Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Publication number: 20100268907Abstract: In an embodiment, a target number of discretionary pages for a first partition is calculated as a function of a number of physical page table faults, a number of sampled page faults, a number of shared physical page pool faults, a number of re-page-ins, and a ratio of pages. If the target number of discretionary pages for the first partition is less than a number of the discretionary pages that are allocated to the first partition, a result page is found that is allocated to the first partition and the result page is deallocated from the first partition. If the target number of discretionary pages for the first partition is greater than the number of the discretionary pages that are allocated to the first partition, a free page is allocated to the first partition.Type: ApplicationFiled: April 16, 2009Publication date: October 21, 2010Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Publication number: 20090307445Abstract: Hypervisor managed memory paging is provided in a data processing system having multiple logical partitions. The data processing system includes a shared memory pool defined within physical memory. The shared memory pool includes a volume of physical memory with dynamically adjustable sub-volumes or sets of physical pages associated with the multiple logical partitions. Each sub-volume or set is associated with a particular logical partition and includes mapped logical memory pages for that logical partition. A hypervisor memory manager interfaces the multiple logical partitions and the shared memory pool, and manages access to logical memory pages within the shared memory pool. The hypervisor memory manager further manages page-out and page-in of logical memory pages from the shared memory pool to one or more external paging devices. This page-out and page-in managing by the hypervisor memory manager is transparent to the multiple logical partitions.Type: ApplicationFiled: March 13, 2009Publication date: December 10, 2009Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Stuart Z. Jacobs, Andrew T. Koch, David A. Larson, Kyle A. Lucke, Wade B. Ouren, Kenneth C. Vossen
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Publication number: 20090307439Abstract: Dynamic control of memory affinity is provided for a shared memory logical partition within a shared memory partition data processing system having a plurality of nodes. The memory affinity control approach includes: determining one or more home node assignments for the shared memory logical partition, with each assigned home node being one node of the plurality of nodes of the system; determining a desired physical page level per node for the shared memory logical partition; and allowing the shared memory partition to run and using the home node assignment(s) and its desired physical page level(s) in the dispatching of tasks to physical processors in the nodes and in hypervisor page memory management to dynamically control memory affinity of the shared memory logical partition in the data processing system.Type: ApplicationFiled: March 13, 2009Publication date: December 10, 2009Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Publication number: 20090307440Abstract: Transparent hypervisor pinning of critical memory areas is provided for a shared memory partition data processing system. The transparent hypervisor pinning includes receiving at a hypervisor a hypervisor call initiated by a logical partition to register a logical memory area of the logical partition with the hypervisor. Responsive to this hypervisor call, the hypervisor transparently determines whether the logical memory is a critical memory area for access by the hypervisor. If the logical memory area is a critical memory area, then the hypervisor automatically pins the logical memory area to physical memory of the shared memory partition data processing system, thereby ensuring that the memory area will not be paged-out from physical memory to external storage, and thus ensuring availability of the logic memory area to the hypervisor.Type: ApplicationFiled: March 13, 2009Publication date: December 10, 2009Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Stuart Z. Jacobs, David A. Larson, Naresh Nayar, Wade B. Ouren
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Publication number: 20090307447Abstract: Migration management is provided for a shared memory logical partition migrating from a source system to a target system. The management approach includes managing migration of the logical partition from the source system to the target system by: transferring a portion of logical partition state information for the migrating logical partition from the source system to the target system by copying at the source system contents of a logical page of the migrating logical partition into a state record buffer for forwarding to the target system; forwarding the state record buffer to the target system; and determining whether the migrating logical partition is suspended at the source system, and if not, copying at the target system contents of the state record buffer to paging storage of the target system, the paging storage being external to physical memory managed by a hypervisor of the target system.Type: ApplicationFiled: March 13, 2009Publication date: December 10, 2009Applicant: International Business Machines CorporationInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Kenneth C. Vossen
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Patent number: 6976137Abstract: A method, apparatus, system, and signal-bearing medium that in an embodiment associate a persistent indicator with allocated memory and determine whether to preserve the contents of the allocated memory during an IPL (Initial Program Load) based on the persistent indicator. If the persistent indicator associated with the memory is on, the contents of that memory are preserved, and if the persistent indicator is off, the contents of that memory are discarded.Type: GrantFiled: April 24, 2003Date of Patent: December 13, 2005Assignee: International Business Machines CorporationInventors: Wade B. Ouren, Kenneth C. Vossen
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Publication number: 20040215911Abstract: A method, apparatus, system, and signal-bearing medium that in an embodiment associate a persistent indicator with allocated memory and determine whether to preserve the contents of the allocated memory during an IPL (Initial Program Load) based on the persistent indicator. If the persistent indicator associated with the memory is on, the contents of that memory are preserved, and if the persistent indicator is off, the contents of that memory are discarded.Type: ApplicationFiled: April 24, 2003Publication date: October 28, 2004Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Wade B. Ouren, Kenneth C. Vossen