Messages in this thread |  | | | Date | Tue, 25 Mar 2008 13:28:53 -0400 | | From | Chris Snook <> | | Subject | Re: [patch] srat, x86_64: Add support for nodes spanning other nodes | |
Suresh Siddha wrote:
> For example, If the physical address layout on a two node system with 8 GB
> memory is something like:> node 0: 0-2GB, 4-6GB> node 1: 2-4GB, 6-8GB> > Current kernels fail to boot/detect this NUMA topology.
> > ACPI SRAT tables can expose such a topology which needs to be supported.
> > Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
> ---
>
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 227fdb0..99eb102 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -880,6 +880,15 @@ config X86_64_ACPI_NUMA
> help
> Enable ACPI SRAT based node topology detection.
>
> +# Some NUMA nodes have memory ranges that span
> +# other nodes. Even though a pfn is valid and
> +# between a node's start and end pfns, it may not
> +# reside on that node. See memmap_init_zone()
> +# for details.
> +config NODES_SPAN_OTHER_NODES
> + def_bool y
> + depends on X86_64_ACPI_NUMA
> +
Is this hunk a leftover from your testing? You're not using the config option
anywhere, and there isn't really anything in this patch that would justify
making this a separate config option in mainline.
-- Chris
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