jffs2 fs overload

[igor.trevisan at bluewind.it]

Hi all,

I'm defining the flash partitions content for my target
and I need a rewritable flash area.
So I formatted and mounted a flash partition as jffs2.
What I noted is that, on a 1MByte flash area I loose
about 600K immediately. If I use the command df I see
that only 30less than 400k are really available.
Is it possible that this is the normal overload if a 
format my flash partition with jffs2?
Or am I doing something wtong?
Is there any good guide or document that can help me
building a jffs2 RW flash partition?
Please forgive me if I couldn't be very clear! If needed to help me 
better I can try to give more information and details about my problem.
Thanks in advance,
Igor.
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