JFFS - ready for submission into 2.[34]?

Alexander Larsson alex at cendio.se
Fri Jun 2 04:04:20 EDT 2000

On Fri, 2 Jun 2000, David Woodhouse wrote:

> alex at cendio.se said:
> > Possibly. But i suppose the real reason is that the current way would
> > be the way you normally use it in embedded systems (like those axis
> > are doing). You generate your root fs on the build machine, create a
> > jffs image and download it into the flash memory of the target system.
> Yeah, but it's still not imperative to create the image in one go from mkfs.
Actually I'm not sure jffs needs a special mkfs at all. An empty flash
should work just as well. It will just creates a root node at mount time.
> We create our Linux (and even NT) workstations by just taking a dump of the
> filesystem after installation, and dd'ing that onto the target. That would
> work just as well for JFFS.
That doesn't work well in a factory producing thousands of cameras a
> Either way - once we get it working on NAND flash, and having to map round 
> bad blocks, we're going to have difficulties with just dumping an image on
> to the flash anyway. 

Well. The bad block remapping can certainly be problematic since the
journal won't be linear anymore. I suppose the lower layer mtd driver does
the remapping automatically?

/ Alex

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