Comment 613 for bug 620074
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7020100
(Get the code!)
Please correct me if I'm wrong, but I do believe that "I/O Wait" time is the amount of time that processes are blocked on disk I/O operations. What I don't understand is why I/O Wait appears to consume CPU time. Is the kernel spinning in a busy wait loop while an I/O operation is pending on a disk? If so, why? The kernel should be allowing some other task to use the CPU during the I/O wait.