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    SubjectRe: [Patch 1/7] x86: add CONFIG_KEXEC_AUTO_RESERVE
    Andi Kleen <andi@firstfloor.org> writes:

    > Amerigo Wang <amwang@redhat.com> writes:
    >
    >> Introduce a new config option KEXEC_AUTO_RESERVE for x86.
    >
    > The description of the feature belongs in the changelog.
    >
    > I like the basic idea, but:
    >
    >> +config KEXEC_AUTO_RESERVE
    >> + 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".
    >> + On x86, 128M is reserved.
    >
    > The obvious problem is the hardcoded 128MB (and 128MB is very large
    > for a crash kernel anyways)
    >
    > More useful would seem a crashkernel=size@auto

    That is actually called "crashkernel=size" and we have had that for quite
    a while. Although some of the init scripts have problems.

    Eric


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