Suppose a memory manager has chosen a modified page for replacement. This page must be sent to secondary storage before the new page may be placed in its page frame. Therefore, the memory manager requests an I/O operation to write this page to secondary storage.An entry is made in a list of I/O requests waiting to be serviced. Thus the page will remain in main memory for some time before the requested I/O operation is performed. Now suppose that, while the other I/O requests are serviced, a running process requests the page to be replaced.How should the memory manager react?
What will be an ideal response?
Ideally, the system should recapture the page before it is sent to secondary storage
because the process needs it immediately.The I/O request is then cancelled and another page
is selected for replacement.
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