JFFS2 on 8MB Flash-Chip conneted to MPC850 works extremly slow:(

Russ Dill Russ.Dill at asu.edu
Wed Aug 29 04:36:54 EDT 2001

On 29 Aug 2001 09:46:13 +0200, Wojciech Kromer wrote:
> >
> > I don't know what an "MDC" is, mut whatever changes your bus timings
> I can only change wait-states in ORx (option register in MPC850).
> But just mounting jffs2 still takes about 2 min :(
> -Are thre any settings in JFFS2 code, or in MTD code?
> -Maybe I can enlarge some buffers? But I don't know where.

jffs2 has to scan the entire medium at mount. Also, if there are
"unformatted" sectors, it erases them (so the first mount will be slower
than subsequent mounts). Did you look at you data sheets and see if that
is as tight as the timing can be?

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