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    SubjectRe: [PATCH 00/14] Pramfs: Persistent and protected ram filesystem
    Marco wrote:
    > Tim Bird wrote:
    >> Marco wrote:
    >>> This is a second attempt at mainlining Pramfs. The first attempt was
    >>> back in early 2004 by MontaVista. Since then the kernel code has almost
    >>> been completely rewritten. So my first item on the list was porting the
    >>> code on a recent kernel version. After that I added the XIP support.
    >> It's very nice to see this technology revived.
    >> Is the information at:
    >> and
    >> still valid - particularly the latter?
    > Yep. at 99%. I've done some modifications due to the porting and there
    > will be some ones due to this review. I tried to talk with Steve
    > Longerbeam to update the site but without success. I'd like to update it.
    >> It would be very nice to see this get mainlined. I believe that
    >> one of the main uses for this is to store crash information
    >> over a reboot so the next kernel (not in crashing state) can have
    >> a better chance of dealing with it. As such, I think
    >> it's important to keep the code paths for Pramfs short, synchronous,
    >> and unentangled with other kernel systems (block IO, page cache, etc.).
    > Yes, I quite agree. I think that this kind of feature would be very
    > useful especially for the embedded world.

    Just FYI - we have an "exception monitor" at Sony
    which is used in several projects, that records application and
    kernel crash information into the file system, for subsequent
    (often in-field) analysis. However, the data currently gets written
    to a flash filesystem and the logs sometimes get truncated or otherwise
    corrupted. This seems like a perfect match for what we're trying
    to do.
    -- Tim

    Tim Bird
    Architecture Group Chair, CE Linux Forum
    Senior Staff Engineer, Sony Corporation of America

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