[newbie] MTD and tiny RAM

[free]

Hello,

I use a very tiny SRAM (128ko) battery backuped to save
very important and changeable data.
I have a char. driver for it (i know how to read/write it)
I would like to mount it on Linux VFS but it seems that
bloc drivers are RAM cached.
Acces on this SRAM must be immediatly apply (if power goes
down data must be safe)

Does MTD could help me :
- is my SRAM not to tiny (128KO) for use with MTD ?
- could i acces to my SRAM through MTD in block mode without caching ?
- what king of file system could fit on such tiny RAM ?


All advices are welcome.

Thanks

Damien