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RE: [PATCH v4 09/17] xen/arm: introduce a helper to parse device tree NUMA distance map
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Henry Wang <Henry.Wang@xxxxxxx>
- Date: Tue, 23 May 2023 10:35:47 +0000
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- Cc: Wei Chen <Wei.Chen@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>
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- Thread-topic: [PATCH v4 09/17] xen/arm: introduce a helper to parse device tree NUMA distance map
Hi Jan,
> -----Original Message-----
> On 23.05.2023 09:32, Henry Wang wrote:
> > By looking into the existing implementation of NUMA for DT,
> > in Linux, from drivers/base/arch_numa.c: numa_set_distance(), there is a
> > "if ((u8)distance != distance)" then return. So I think at least in Linux
> > the
> > distance value is consistent with the ACPI spec.
>
> Can we simply gain a similar check (suitably commented), eliminating the
> need for saturation?
Yes, I will use the similar check and add the related comments in v5. Thanks
for your confirmation!
Kind regards,
Henry
>
> Jan
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