JFFS2 ram memory usage

[Øyvind Harboe]

>You could also remove the actual compression routines if 
>you're going to do that. 

In my patch I:

- removed the allocation of the compression/decompression buffer
that the compression routines uses to attempt to compress.
- removed the invocation of the compression/decompression call.

>Other users, especially eCos users, may want to individually 
>select the compression algorithms available too.

Agreed.

I haven't checked, but I can't imagine that the runlength
compressor using a lot of memory.

>Finding a way to eliminate the 'totlen' field of the 
>jffs2_raw_node_ref structure might be productive. Or possibly 
>making the jffs2_raw_node_ref contain doubly-linked lists if 
>that then means we can discard obsolete nodes immediately 
>rather than keeping them around.

I don't speak enough JFFS2 currently to comfortably attempt this.

Øyvind