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SubjectRe: [PATCH v2 3/3] mm: enable CONFIG_MOVABLE_NODE on powerpc
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Reza Arbab <arbab@linux.vnet.ibm.com> writes:

> Onlining memory into ZONE_MOVABLE requires CONFIG_MOVABLE_NODE. Enable
> the use of this config option on PPC64 platforms.
>
> Signed-off-by: Reza Arbab <arbab@linux.vnet.ibm.com>
> ---
> Documentation/kernel-parameters.txt | 2 +-
> mm/Kconfig | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> index a4f4d69..3d8460d 100644
> --- a/Documentation/kernel-parameters.txt
> +++ b/Documentation/kernel-parameters.txt
> @@ -2344,7 +2344,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
> that the amount of memory usable for all allocations
> is not too small.
>
> - movable_node [KNL,X86] Boot-time switch to enable the effects
> + movable_node [KNL,X86,PPC] Boot-time switch to enable the effects
> of CONFIG_MOVABLE_NODE=y. See mm/Kconfig for details.
>

Movable node also does.
memblock_set_bottom_up(true);
What is the impact of that. Do we need changes equivalent to that ? Also
where are we marking the nodes which can be hotplugged, ie where do we
do memblock_mark_hotplug() ?

> MTD_Partition= [MTD]
> diff --git a/mm/Kconfig b/mm/Kconfig
> index be0ee11..4b19cd3 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -153,7 +153,7 @@ config MOVABLE_NODE
> bool "Enable to assign a node which has only movable memory"
> depends on HAVE_MEMBLOCK
> depends on NO_BOOTMEM
> - depends on X86_64
> + depends on X86_64 || PPC64
> depends on NUMA
> default n
> help

-aneesh

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