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SubjectRe: [PATCH] MIPS: Loongson: Fix complie errors without CONFIG_SMP
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On 08/26/2020 09:01 PM, Matthew Wilcox wrote:
> On Wed, Aug 26, 2020 at 08:53:27PM +0800, Jinyang He wrote:
>> +++ b/arch/mips/include/asm/mach-loongson64/topology.h
>> @@ -4,7 +4,11 @@
>>
>> #ifdef CONFIG_NUMA
>>
>> +#ifdef CONFIG_SMP
>> #define cpu_to_node(cpu) (cpu_logical_map(cpu) >> 2)
>> +#else
>> +#define cpu_to_node(cpu) 0
>> +#endif
> Are you saying you've enabled NUMA without enabling SMP? Does that make
> sense?

NUMA option normally work with more than two nodes, though Loongson64 use it
default after patch 6fbde6b492dfc761ad60a68fb2cb32b1eb05b786. Loongson64(3A)'s
each node consists of 4 cpus while it only has 4 cpus. In other words, it has
only one node while open NUMA. I'm confused it if NUMA deponds on SMP.

I'll try fix it with unabling NUMA and SMP later.

Thanks.:-)

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