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    Subject[Patch 0/8] V4 Implement crashkernel=auto
    V3 -> V4:
    - Reorder the patches.
    - Really free the reserved memory, instead of remapping it.
    (Thanks to KAMEZAWA Hiroyuki!)
    - Release the reserved memory resource when the size is 0.
    - Use strict_strtoul() instead of simple_strtoul().

    V2 -> V3:
    - Use more clever way to calculate reserved memory size, especially for IA64.
    - Add that patch that implements shrinking reserved memory

    V1 -> V2:
    - Use include/asm-generic/kexec.h, suggested by Neil.
    - Rename a local variable, suggested by Fenghua.
    - Fix some style problems found by checkpatch.pl.
    - Unify the Kconfig docs.

    This series of patch implements automatically reserved memory for crashkernel,
    by introducing a new boot option "crashkernel=auto". This idea is from Neil.

    In case of breaking user-space applications, it modifies this boot option after
    it decides how much memory should be reserved.

    On different arch, the threshold and reserved memory size is different. Please
    refer patch 8/8 which contains an update for the documentation.

    Patch 1/8 implements shrinking reserved memory at run-time, which is useful
    when more than enough memory is reserved automatically.

    Note: This patchset was only tested on x86_64 with differernt memory sizes.

    Cc: Neil Horman <nhorman@redhat.com>
    Cc: Eric W. Biederman <ebiederm@xmission.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Tony Luck <tony.luck@intel.com>
    Cc: Anton Vorontsov <avorontsov@ru.mvista.com>
    Cc: Andi Kleen <andi@firstfloor.org>
    Cc: Fenghua Yu <fenghua.yu@intel.com>
    Cc: Bernhard Walle <bernhard.walle@gmx.de>
    Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Signed-off-by: WANG Cong <amwang@redhat.com>

    ---
    Documentation/kdump/kdump.txt | 28 ++++++
    arch/ia64/Kconfig | 14 +++
    arch/ia64/include/asm/kexec.h | 23 ++++
    arch/powerpc/Kconfig | 11 ++
    arch/powerpc/include/asm/kexec.h | 8 +
    arch/x86/Kconfig | 13 ++
    arch/x86/include/asm/kexec.h | 1
    include/asm-generic/kexec.h | 42 +++++++++
    include/linux/kexec.h | 5 +
    kernel/kexec.c | 180 +++++++++++++++++++++++++++++++++++++++
    kernel/ksysfs.c | 46 +++++++++
    11 files changed, 371 insertions(+)


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