Utilizing kernel thread dispatch latency for input/output processing

A computer system comprising:

• a processor set;
• one or more computer-readable storage media;
• and
• program instructions stored on the one or more storage media to cause the processor set to perform operations comprising:
• executing an interrupt handler in response to an interrupt raised by an I/O adapter;
• dispatching, by the interrupt handler, a kernel thread configured for I/O processing;
• processing, by the interrupt handler while waiting for an acknowledgement by the kernel thread, one or more I/O events of a plurality of I/O events in an I/O queue for the I/O adapter;
• transferring, by the interrupt handler, the I/O processing to the kernel thread in response to detecting the acknowledgement by the kernel thread;
• and
• processing, by the kernel thread, remaining I/O events in the I/O queue.

A computer program product comprising:

• one or more computer-readable storage media;
• and
• program instructions stored on the one or more storage media to perform operations comprising:
• executing an interrupt handler in response to an interrupt raised by an I/O adapter;
• dispatching, by the interrupt handler, a kernel thread configured for I/O processing;
• processing, by the interrupt handler while waiting for an acknowledgement by the kernel thread, one or more I/O events of a plurality of I/O events in an I/O queue for the I/O adapter;
• transferring, by the interrupt handler, the I/O processing to the kernel thread in response to detecting the acknowledgement by the kernel thread;
• and
• processing, by the kernel thread, remaining I/O events in the I/O queue.