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JFFS Home Page
Journaling Flash File System
JFFS is the Journaling Flash File System developed by Axis
Communications in Sweden, aimed at providing a
crash/powerdown-safe filesystem for disk-less embedded
devices. It is released under the GPL, and the current version
works for the Linux 2.0 kernel series and memory-mapped
industry-standard flash-memories (aka NOR-flashes).
The code is available inside the eLinux tar-file in the download
section. A stand-alone patch-file will be available soon,
along with better documentation and a white paper about the
design.
TODO stuff:
- Port to Linux 2.2 and 2.3/4.
- Support for NAND-flashes (block-mapped flashes).
- Standardizing the interface between JFFS and the
flash-driver (see http://www.linux-mtd.infradead.org).
- Evaluating the difference in GC tuning-parameters.
- Bad-sector list, to use the last drop of the flash when
it starts to get old or bad.
- JFFS keeps the flash's directory structure in RAM all
the time. Some mechanism to make this scale better as the
flash complexity goes up would probably be useful.
We at Axis cannot give detailed support on how to use or
install JFFS other than what is on this mailing-list, or in
the documentation. However we will keep together the
community's patches, bugfixes and improvements. We are
planning on putting up an external CVS server or using
sourceforge - but in the meantime, patches can be sent to the
mailing-list or to the maintainer Bj�rn Wes�n <[email protected]>.
JFFS Developer Mailing List
To join the developer mailing-list, please send an email to [email protected]
containing this line in the body of the email: subscribe
jffs-dev
The jffs-dev mailing list is archived at: http://mhonarc.axis.se/jffs-dev/threads.html |
