Replacing a failing physical processor

• US 7,478,272 B2
• Filed: 09/30/2005
• Issued: 01/13/2009
• Est. Priority Date: 09/30/2005
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Nayar, Naresh, Ricard, Gary R., Armstrong, William J.
• Primary Examiner(s): Wilson; Yolanda L
• Application Number:
  US11/241,709
• Publication Number:
  US 20070079176A1
• Time in Patent Office: 1,201 Days
• Field of Search: 714 10- 13, 718/1
• US Class Current: 714/10
• CPC Class Codes: G06F 11/2025 using centralised failover control functionality
• CPC Class Codes: G06F 11/203 using migration
• CPC Class Codes: G06F 11/2035 without idle spare hardware
• CPC Class Codes: G06F 9/5066 Algorithms for mapping a plurality of inter-dependent sub-tasks onto a plurality of physical CPUs mappping at compile time, see G06F8/451

Abstract

Replacing a failing physical processor in a computer supporting multiple logical partitions, where the logical partitions include dedicated partitions and shared processor partitions, the dedicated partitions are supported by virtual processors having assigned physical processors, and the shared processor partitions are supported by pools of virtual processors. The pools of virtual processors have assigned physical processors. Embodiments operate generally by assigning priorities to the dedicated partitions and to the pools of virtual processors; detecting a checkstop of a failing physical processor; retrieving the failing physical processor'"'"'s state; replacing by a hypervisor the failing physical processor with a replacement physical processor assigned to a dedicated partition or pool, which dedicated partition or pool has the lowest priority among the priorities of the dedicated partitions and pools; and assigning the retrieved state of the failing physical processor as the state of the replacement physical processor.

Claims

1. A method for replacing a failing physical processor in a computer supporting multiple logical partitions, the logical partitions including dedicated partitions and shared processor partitions, the dedicated partitions supported by virtual processors having assigned physical processors, the shared processor partitions supported by pools of virtual processors, the pools having assigned physical processors, the method comprising:

assigning priorities to the dedicated partitions and to the pools of virtual processors;

detecting a checkstop of a failing physical processor;

retrieving the failing physical processor'"'"'s state;

replacing by a hypervisor the failing physical processor with a replacement physical processor assigned to a dedicated partition or pool, which dedicated partition or pool has the lowest priority among the priorities of the dedicated partitions and pools, wherein the dedicated partition or pool having the lowest priority is a dedicated partition, and replacing the failing physical processor includes terminating the dedicated partition having the lowest priority; and

assigning the retrieved state of the failing physical processor as the state of the replacement physical processor.

2. A method for replacing a failing physical processor in a computer supporting multiple logical partitions, the logical partitions including dedicated partitions and shared processor partitions, the dedicated partitions supported by virtual processors having assigned physical processors, the shared processor partitions supported by pools of virtual processors, the pools having assigned physical processors, the method comprising:

assigning priorities to the dedicated partitions and to the pools of virtual processors;

detecting a checkstop of a failing physical processor;

retrieving the hum physical processor'"'"'s state;

replacing by a hypervisor the failing physical processor with a replacement physical processor assigned to a dedicated partition or pool, which dedicated partition or pool has the lowest priority among the priorities of the dedicated partitions and pools, wherein the dedicated partition or pool having the lowest priority is a dedicated partition, and replacing the failing physical processor includes running the dedicated partition having the lowest priority overcommitted; and

assigning the retrieved state of the failing physical processor as the state of the replacement physical processor.

3. A method for replacing a failing physical processor in a computer supporting multiple logical partitions, the logical partitions including dedicated partitions and shared processor partitions, the dedicated partitions supported by virtual processors having assigned physical processors, the shared processor partitions supported by pools of virtual processors, the pools having assigned physical processors, the method comprising:

assigning priorities to the dedicated partitions and to the pools of virtual processors;

detecting a checkstop of a failing physical processor;

retrieving the failing physical processor'"'"'s state;

replacing by a hypervisor the failing physical processor with a replacement physical processor assigned to a dedicated partition or pool, which dedicated partition or pool has the lowest priority among the priorities of the dedicated partitions and pools, wherein the dedicated partition or pool having the lowest priority is a pool, and replacing the failing physical processor includes terminating the pool having the lowest priority; and

assigning the retrieved state of the failing physical processor as the state of the replacement physical processor.

4. A method for replacing a failing physical processor in a computer supporting multiple logical partitions, the logical partitions including dedicated partitions and shared processor partitions, the dedicated partitions supported by virtual processors having assigned physical processors, the shared processor partitions supported by pools of virtual processors, the pools having assigned physical processors, the method comprising:

assigning priorities to the dedicated partitions and to the pools of virtual processors;

detecting a checkstop of a failing physical processor;

retrieving the failing physical processor'"'"'s state;

replacing by a hypervisor the failing physical processor with replacement physical processor assigned to a dedicated partition or pool, which dedicated partition or pool has the lowest priority among the priorities of the dedicated partitions and pools, wherein the dedicated partition or pool having the lowest priority is a pool, and replacing the failing physical processor includes running the pool having the lowest priority overcommitted; and

assigning the retrieved state of the failing physical processor as the state of the replacement physical processor.