• Richard Purdie's avatar
    [MTD] oops and panic message logging to MTD device · 4b23aff0
    Richard Purdie authored
    Kernel oops and panic messages are invaluable when debugging crashes.
    These messages often don't make it to flash based logging methods (say a
    syslog on jffs2) due to the overheads involved in writing to flash.
    
    This patch allows you to turn an MTD partition into a circular log
    buffer where kernel oops and panic messages are written to. The messages
    are obtained by registering a console driver and checking
    oops_in_progress. Erases are performed in advance to maximise the
    chances of a saving messages.
    
    To activate it, add console=ttyMTDx to the kernel commandline (where x
    is the mtd device number to use).
    Signed-off-by: default avatarRichard Purdie <rpurdie@openedhand.com>
    Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
    4b23aff0
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