Typically, at the completion of a device I/O, a single interrupt is raised
and appropriately handled by the host processor. In certain settings,
however, the code that is to be executed at the completion of the
I/O can be broken into two separate pieces. The first piece executes
immediately after the I/O completes and schedules a second interrupt
for the remaining piece of code to be executed at a later time. What is
the purpose of using this strategy in the design of interrupt handlers?
