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Optimised Linux swap system for flash memory

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4 Author(s)
M. Lin ; Chongqing University, China ; S. Chen ; G. Lv ; Z. Zhou

Proposed is an optimised Linux swap system, called SGBI, where the Linux kernel manages the flash memory-based swap area directly without FTL. This approach not only introduces an efficient swap-aware garbage collection policy to reduce its cleaning cost and improve the degree of wear-levelling, but also adopts an efficient swap-in read-ahead scheme to delay the execution of garbage collection. Swap I/O traces from the Linux kernel have been collected and trace-driven simulations performed, which show that the proposed approach greatly outperforms existing Linux swap systems.

Published in:

Electronics Letters  (Volume:47 ,  Issue: 11 )