= Dirty memory page
A resident <memory page> with modifications that must be preserved in its backing storage before its <page frame> can be reused. In the simple model here, a write sets its dirty flag, and successful <page writeback> clears it. A clean <memory page> with a recoverable backing copy can be discarded without an outgoing data write.<Operating Systems: Three Easy Pieces by Remzi H. Arpaci-Dusseau and others/Beyond Physical Memory: Policies>[Section 22.9, p. 13: modified/dirty bit and the outgoing I/O difference between dirty and clean eviction]{ref}
Back to article page
