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    Subject[patch 7/7] Add documentation for extended crashkernel syntax
    This adds the documentation for the extended crashkernel syntax into

    Signed-off-by: Bernhard Walle <>

    Documentation/kdump/kdump.txt | 26 ++++++++++++++++++++++++++
    1 file changed, 26 insertions(+)

    --- a/Documentation/kdump/kdump.txt
    +++ b/Documentation/kdump/kdump.txt
    @@ -231,6 +231,32 @@ Dump-capture kernel config options (Arch
    any space below the alignment point will be wasted.

    +Extended crashkernel syntax
    +While the "crashkernel=size[@offset]" syntax is sufficient for most
    +configurations, sometimes it's handy to have the reserved memory dependent
    +on the value of System RAM -- that's mostly for distributors that pre-setup
    +the kernel command line to avoid a unbootable system after some memory has
    +been removed from the machine.
    +The syntax is:
    + crashkernel=<range1>:<size1>[,<range2>:<size2>,...][@offset]
    + range=start-[end]
    +For example:
    + crashkernel=512M-2G:64M,2G-:128M
    +This would mean:
    + 1) if the RAM is smaller than 512M, then don't reserve anything
    + (this is the "rescue" case)
    + 2) if the RAM size is between 512M and 2G, then reserve 64M
    + 3) if the RAM size is larger than 2G, then reserve 128M
    Boot into System Kernel

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      Last update: 2007-09-13 18:19    [W:0.021 / U:13.396 seconds]
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