07/04/22 12:41:58 D93fVub+
>>499, 504
じゃなくて、最大CPU数を4にすれば起動します。
同じ設定で最大CPU数を8にすると5つ目のCPUを認識した瞬間（のように見える）再起動するのです。
ほんとに瞬間的なので、表示されているログをきちんと見ることもできません。
最大CPU４のときの認識の様子は次のとおりです。
ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
Processor #0 15:1 APIC version 16
ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
Processor #1 15:1 APIC version 16
ACPI: LAPIC (acpi_id[0x03] lapic_id[0x02] enabled)
Processor #2 15:1 APIC version 16
ACPI: LAPIC (acpi_id[0x04] lapic_id[0x03] enabled)
Processor #3 15:1 APIC version 16
ACPI: LAPIC (acpi_id[0x05] lapic_id[0x04] enabled)
Processor #4 15:1 APIC version 16
WARNING: NR_CPUS limit of 4 reached. Processor ignored.
ACPI: LAPIC (acpi_id[0x06] lapic_id[0x05] enabled)
Processor #5 15:1 APIC version 16
WARNING: NR_CPUS limit of 4 reached. Processor ignored.
ACPI: LAPIC (acpi_id[0x07] lapic_id[0x06] enabled)
Processor #6 15:1 APIC version 16
WARNING: NR_CPUS limit of 4 reached. Processor ignored.
ACPI: LAPIC (acpi_id[0x08] lapic_id[0x07] enabled)
Processor #7 15:1 APIC version 16
WARNING: NR_CPUS limit of 4 reached. Processor ignored.