Fine grained, direct access file system support for storage class memory

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• 作者：Yi Wang^a ; ^bAuthor Vitae ; Tianzheng Wang^cAuthor Vitae ; Duo Liu^dAuthor Vitae ; Zili Shao ; ^f ; ^{cszlshao@comp.polyu.edu.hk}Author Vitae ; Jingling Xue^eAuthor Vitae
• 关键词：Storage class memory ; Memory management ; Block device support ; Phase change memory ; Byte-addressable direct I/O
• 刊名：Journal of Systems Architecture
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：72
• 期：Complete
• 页码：80-92
• 全文大小：1494 K
• 卷排序：72

文摘

We propose a file system-independent block device interface for SCM, which provides backward compatibility and transparently supports the integration of SCM in current computer systems. We bypass traditional disk caches to allow fast direct I/O access to SCM, so that secondary storage can be accessed identically as main memory. We propose a new hybrid CPU mode for the DRAM-SCM architecture and introduce two new privileged instructions to provide fine-grained, physical access to SCM.