Add Pramfs filesystem to the kernel mainline - Revision history

Prpplague at 21:29, 2 December 2009

2009-12-02T21:29:15Z

Tim Bird: add to category:project proposals

2009-12-02T19:03:36Z

add to category:project proposals

Tim Bird: add pramfs project

2009-12-02T19:02:30Z

add pramfs project

New page

; Summary: Add Pramfs filesystem to the kernel mainline

; Proposer: Marco Stornelli

== Description ==
It would be nice to add Pramfs to the kernel mainline.

Many embedded systems have a block of non-volatile RAM seperate from
normal system memory, i.e. of which the kernel maintains no memory page
descriptors. For such systems it would be beneficial to mount a
read/write filesystem over this "I/O memory", for storing frequently
accessed data that must survive system reboots and power cycles. An
example usage might be system logs under /var/log, or a user address
book in a cell phone or PDA.

Currently Linux has no support for a persistent, non-volatile RAM-based
filesystem, persistent meaning the filesystem survives a system reboot
or power cycle intact. The existing RAM-based filesystems such as tmpfs
and ramfs have no actual backing store but exist entirely in the page
and buffer caches, hence the filesystem disappears after a system reboot
or power cycle.

In the last review (end of June) some people have asked some
modifications. The bigger ones are: fs layout endianess indipendent and
a protection against system crash (a little journaling system for
example). In the last version I closed all the open issues with the
exception of the last one. It would be nice to close even this point to
be ready for the mainline!

; Related work : http://pramfs.sourceforge.net

; Scope : This should take 6 weeks/man of development and test effort.

== Comments ==
Tim Bird writes:
<pre>
Pramfs has been hanging around outside of mainline
since CELF was created (2003), and was on our list of stuff
to try to mainline then. It's been attempted at least 3 times,
but maybe with your fixups to address feedback from LKML it
can finally make it in.

I have my doubts as to how important the journaling feature is.
</pre>

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	I have my doubts as to how important the journaling feature is.		I have my doubts as to how important the journaling feature is.
	</pre>		</pre>
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		+	[[Category:Project proposals]]

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-; Summary: Add Pramfs filesystem to the kernel mainline
+; Summary: Add [[PRAMFS2|Pramfs]] filesystem to the kernel mainline
 ; Proposer: Marco Stornelli
 == Description ==
-It would be nice to add Pramfs to the kernel mainline.
+It would be nice to add [[PRAMFS2|Pramfs]] to the kernel mainline.
 Many embedded systems have a block of non-volatile RAM seperate from