Patent ID: 7168088
Filing Date: 2007-01-23
Classification: G06F

Abstract:
1. A method for preventing access to a shared peripheral device by a processor-based node in a multinode system, comprising: (1) determining a first list of nodes in the multinode system, including the processor-based node, that have access to the shared peripheral device; (2) generating a first value reflecting the first list of nodes; (3) storing at the shared peripheral device the first value; (4) sending an access request from the processor-based node to the shared peripheral device, the request including a second value representing a second list of nodes in the multinode system; (5) determining whether the first and second values are identical; (6) if the first and second values are identical, then executing the access request to the shared peripheral device, else denying the access request; and (7) repeating steps 5 and 6 each time an access request is sent from the processor-based node to the device.