Messages in this thread | | | Date | Mon, 8 Apr 2024 10:06:14 -0700 (PDT) | From | "Lameter, Christopher" <> | Subject | Re: [PATCH v3] NUMA: Early use of cpu_to_node() returns 0 instead of the correct node id |
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On Wed, 27 Mar 2024, Andrew Morton wrote:
>> In order to fix the bug, the patch introduces early_numa_node_init() >> which is called after smp_prepare_boot_cpu() in start_kernel. >> early_numa_node_init will initialize the "numa_node" as soon as >> the early_cpu_to_node() is ready, before the cpu_to_node() is called >> at the first time. > > What are the userspace-visible runtime effects of this bug?
Performance is reduced since there is increase in off node accesses.
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