On Thursday 19 August 2010 13:15:32 levin wrote:
> hi all,
> By the speed comparison on the site, I changed some configuration in
> yaffs2/yaffs2_guts.h to
> #define YAFFS_BYTES_PER_SPARE 64
> #define YAFFS_BYTES_PER_CHUNK 2048
> #define YAFFS_CHUNK_SIZE_SHIFT 11
> #define YAFFS_CHUNKS_PER_BLOCK 64
>
> originally it's
> #define YAFFS_BYTES_PER_SPARE 16
> #define YAFFS_BYTES_PER_CHUNK 512
> #define YAFFS_CHUNK_SIZE_SHIFT 9
> #define YAFFS_CHUNKS_PER_BLOCK 32
The above only apply to the yaffs1 mode which does not apply to you.
> besides the nand flash i used is 16bits wide-bus and support 2kB
> page(chunk) read.
>
> but there is no read and write speedup.
> Whether there are some other changes needed to fit it.
> The operating system is linux 2.6
You need to make the appropriate changes in the Linux mtd layer so that it
provides the correct information to yaffs.
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