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    SubjectRe: [PATCH v2 0/3] Kernel handling of Dynamic Logical Partitioning
    Nathan Fontenot <nfont@austin.ibm.com> writes:

    > version 2 of the patch set with updates from comments.
    >
    > The Dynamic Logical Partitioning (DLPAR) capabilities of the powerpc pseries
    > platform allows for the addition and removal of resources (i.e. cpus,
    > memory, pci devices) from a partition. The removal of a resource involves
    > removing the resource's node from the device tree and then returning the
    > resource to firmware via the rtas set-indicator call. To add a resource, it
    > is first obtained from firmware via the rtas set-indicator call and then a
    > new device tree node is created using the ibm,configure-coinnector rtas call
    > and added to the device tree.
    >
    > The following set of patches implements the needed infrastructure to have the
    > kernel handle the DLPAR addition and removal of cpus (other DLPAR'able items to
    > follow in future patches). The framework for this is to create a set of
    > probe/release sysfs files that will facilitate arch-specific call-outs to handle
    > addition and removal of cpus to the system.

    How does this differ from /sys/devices/system/cpu/cpuX/online ?

    From the descriptions it appears that we already have what you are trying to
    add and you just need to tie it into DLPAR on ppc.

    Eric


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