SA-YAFFS:支持交换系统的YAFFS闪存文件系统

LINUX交换系统不支持在闪存（NAND flash）上直接建立交换区域。虽然可以使用NFTL／FTL层或者FASS闪存交换系统实现在闪存上建立交换分区。然而，这两种方法都采用静态分配交换区域，将交换系统的读写磨损限制在了闪存固定的某个区域，可能会造成闪存局部过度磨损。提出的SA-YAFFS系统，将交换系统的支持性和闪存文件系统有机统一，在闪存上动态分配交换区域，避免了将交换系统的读写磨损限制在闪存固定的区域，并利用文件系统中大量的空闲空间分担交换系统带来的磨损，避免了局部过度磨损。实验表明，当“文件系统逻辑配额的剩余空闲空间＋交换系统逻辑配额”增加到n倍，交换系统导致的磨损为原来的1／n。

SA-YAFFS:A YAFFS FLASH FILESYSTEM SUPPORTING SWAP SYSTEM

The Linux swap system doesn't support the swap area directly on the NAND Flash.Although both NFTL/FTL layer and FASS NAND Flash swap system can realize swap area on NAND Flash,however,both of them allocate swap area statically and limit the I/O of swap system within a certain NAND Flash physical area,which may overwear some part of the NAND Flash.This paper will propose a new system called SA-YAFFS.It integrates the support of the swaps system and the flash filesystem as an organic unity,and dynamically all...