• Damien George's avatar
    stmhal: Improve flash storage cache management. · 6d983539
    Damien George authored
    Internal flash used for the filesystem is now written (from the cache)
    only after a 5s delay, or when a file is closed, or when the drive is
    unmounted from the host.  This delay means that multiple writes can
    accumulate in the cache, and leads to less writes to the flash, making
    it last longer.
    It's implemented by a high-priority interrupt that takes care of flash
    erase and write, and flushing the cache.
    This is still only an interim solution for the flash filesystem.  It
    eventually needs to be replaced with something that uses less RAM for
    the cache, something that can use more of the flash, and something that
    does proper wear levelling.