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Memory management

Memory management

Robin_宋
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Not all memory addresses are the same -ZONE_DMA: DMA memory (< 16MB) --Really old I/O devices that have constrained addresses -ZONE_DMA32: 32 bit DMA memory ( < 4GB) --Older I/O devices that only support 32 bit DMA -ZONE_NORMAL: Generic Kernel memory --Always directly addressable by the kernel Linux groups memory into zones -Based on the use cases for memory -Allow allocations to occur in a given zone -How?
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