[Ce-android-mainline] [PATCH 04/10] android: ram_console: split out persistent ram

[john stultz]

On Sun, 2012-02-19 at 16:44 -0800, Colin Cross wrote:
> Split ram_console into two halves.
> 
> persistent_ram is a set of apis that handle a block of memory
> that does not get erased across a reboot.  It provides functions
> to fill it as a single buffer or a ring buffer, and to extract
> the old data after a reboot.  It handles ecc on the data to
> correct bit errors introduced during reboot.
> 
> ram_console is now a small wrapper around persistent_ram that
> feeds console data into the ringbuffer, and exports the old
> data to /proc/last_kmsg after a reboot.

This looks very cool (esp the ftrace bit), although have you looked at
all into the pstore work to see how it might be able to be integrated?

Kees (cc'ed) has apparently been working to get the ramoops driver
(which writes oops and panic messages to a similar in-ram circular
buffer) working with pstore and there seems like there is some overlap
here. 

I'm not saying this should block this code going into staging, but just
wanted to know if you had looked into the similar works and if so, could
articulate why they couldn't be reused (so others can try to help
integrate things if necessary).

thanks
-john