© Thomas Kunz 2000
SCE 574
240
Page Faults
äA
valid / invalid bit is used to indicate whether a page is currently in memory or
not.
äA
page fault occurs whenever the page referenced by the process is not in
memory
äSteps
in handling a page fault:
äa
trap is generated
äa
page frame is allocated
äa
page is read into the page frame
äthe
page table is updated
äthe
instruction is restarted