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Re: [PATCH] x86/NUMA: improve memnode_shift calculation for multi node system
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Fri, 30 Sep 2022 13:25:29 +0200
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Fri, 30 Sep 2022 11:26:29 +0000
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On Tue, Sep 27, 2022 at 06:20:35PM +0200, Jan Beulich wrote:
> SRAT may describe individual nodes using multiple ranges. When they're
> adjacent (with or without a gap in between), only the start of the first
> such range actually needs accounting for. Furthermore the very first
> range doesn't need considering of its start address at all, as it's fine
> to associate all lower addresses (with no memory) with that same node.
> For this to work, the array of ranges needs to be sorted by address -
> adjust logic accordingly in acpi_numa_memory_affinity_init().
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Thanks, Roger.
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