What is dirty bit? - operating system

What is dirty bit?

When a bit is modified by the CPU and not written back to the storage, it is called as a dirty bit. This bit is present in the memory cache or the virtual storage space.

What is dirty bit?

A dirty bit is a flag that indicates whether an attribute needs to be updated. Such situations usually occur when a bit in a memory cache or virtual memory page that has been changed by a processor but has not been updated in the storage.
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