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    Subject[Patch 1/8] x86: add CONFIG_KEXEC_AUTO_RESERVE

    Introduce a new config option KEXEC_AUTO_RESERVE for x86.

    Signed-off-by: WANG Cong <>
    Acked-by: Neil Horman <>


    Index: linux-2.6/arch/x86/Kconfig
    --- linux-2.6.orig/arch/x86/Kconfig
    +++ linux-2.6/arch/x86/Kconfig
    @@ -1482,6 +1482,19 @@ config KEXEC
    support. As of this writing the exact hardware interface is
    strongly in flux, so no good recommendation can be made.

    + bool "automatically reserve memory for kexec kernel"
    + depends on KEXEC
    + default y
    + ---help---
    + Automatically reserve memory for a kexec kernel, so that you don't
    + need to specify numbers for the "crashkernel=X@Y" boot option,
    + instead you can use "crashkernel=auto". To make this work, you need
    + to have more than 4G memory.
    + On x86_32, 128M is reserved, on x86_64 1/32 of your memory is
    + reserved, but it will not exceed 4G.
    config CRASH_DUMP
    bool "kernel crash dumps"
    depends on X86_64 || (X86_32 && HIGHMEM)

     \ /
      Last update: 2009-08-27 05:19    [W:0.019 / U:0.576 seconds]
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