[PATCH -V3] mm: Move change_prot_numa outside CONFIG_ARCH_USES_NUMA_PROT_NONE

[Rik van Riel]

On 12/05/2013 01:38 PM, Aneesh Kumar K.V wrote:
> From: "Aneesh Kumar K.V" <aneesh.kumar at linux.vnet.ibm.com>
>
> change_prot_numa should work even if _PAGE_NUMA != _PAGE_PROTNONE.
> On archs like ppc64 that don't use _PAGE_PROTNONE and also have
> a separate page table outside linux pagetable, we just need to
> make sure that when calling change_prot_numa we flush the
> hardware page table entry so that next page access  result in a numa
> fault.
>
> We still need to make sure we use the numa faulting logic only
> when CONFIG_NUMA_BALANCING is set. This implies the migrate-on-fault
> (Lazy migration) via mbind will only work if CONFIG_NUMA_BALANCING
> is set.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>

Reviewed-by: Rik van Riel <riel at redhat.com>