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    SubjectRe: [PATCH 11/14] x86: Populate cpu_enabled_map
    Alex Chiang wrote:
    > Populate the cpu_enabled_map correctly.
    >
    > Note that this patch does not actually make any decisions based
    > on the contents of the map.
    >
    > However, as the map is presented via sysfs in:
    >
    > /sys/devices/system/cpu/
    >
    > It should be populated correctly.
    >
    > There will be a user-visible change under the above directory.
    > cpuN/ entries for firmware-disabled CPUs will now appear, whereas
    > before, they did not due to a check against ACPI_MADT_ENABLED.
    >
    > The cpuN/ entries will be empty, and the online file in the
    > above directory will reflect which CPUs are actually schedulable.
    >
    > Signed-off-by: Alex Chiang <achiang@hp.com>
    > Cc: Ingo Molnar <mingo@redhat.com>
    > Cc: Thomas Gleixner <tglx@linutronix.de>
    > Cc: H. Peter Anvin <hpa@zytor.com>

    From an x86 standpoint this patchset seems reasonable to me.

    Acked-by: H. Peter Anvin <hpa@zytor.com>

    Since it is a panarch patchset it presumably should go via -mm rather
    than in the arch trees, so I'm not going to add it to -tip.

    Obviously, if the sematics of the operations don't make sense for other
    architectures -- which I will leave up to the affected maintainers --
    then that should be carefully considered if the generic operations can
    be done better.

    -hpa


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