Patent attributes
A system for tagged interrupt forwarding comprises a multiprocessor including a first and a second processor, an I/O device, and I/O management software. In response to an application I/O request, the I/O management software may be configured to prepare a request descriptor at the first processor, including an identification of the first processor. The I/O management software may then send a hardware or device-level I/O request to the I/O device. When the I/O device completes the requested hardware I/O operation, it may send a response, which may be received at the second processor. I/O management software at the second processor may be configured to transfer control for processing the response back to the first processor at which the I/O request was initiated, using the tag to identify the first processor. Processing of the response may then be completed at the first processor.
