Patent ID: 7725632
Filing Date: 2010-05-25
Classification: G06F

Abstract:
1. A method that manages a computer system that includes a plurality of computers, each having a CPU, a memory, and a PCI interface, one or more PCI switches used to connect those computers through the PCI interfaces, a plurality of PCI devices connected to the PCI switch, a system controller that controls the computers, and a PCI manager that controls allocation of the PCI devices to the computers, in the system controller, comprising the steps of: managing allocation of the computers and the PCI manager; (a) powering one of the plurality of computers to start up its operation system; (b) acquiring a PCI tree identifier and PCI tree management information denoting the status of the PCI tree from the PCI manager with respect to the PCI tree denoting a topology of a PCI device allocated to the computer; (c) retrying powering of the computer or canceling the powering if the acquired PCI tree management information denotes that the PCI tree is being initialized or not initialized yet; and (d) powering the computer if the PCI management information denotes completion of the PCI tree initialization.