Kernel – 4.9.1 Released, Still Getting ‘Too Many CPUs’ Warnings, on i7..

Updated the main (Intel i7) system to kernel 4.9.1, but still getting ACPI/CPU warnings on boot, which started appearing with 4.9.0:

................
[ 0.000000] Linux version 4.9.1 (root@rglinux-i7) (gcc version 6.2.1 20160916 (Red Hat 6.2.1-2) (GCC) ) #1 SMP Fri Jan 6 11:07:16 PST 2017
............... 
[ 0.000000] ACPI: PM-Timer IO Port: 0x408
[ 0.000000] ACPI: Local APIC address 0xfee00000
[ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 4/0x1 ignored.
[ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 5/0x3 ignored.
[ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 6/0x5 ignored.
[ 0.000000] APIC: NR_CPUS/possible_cpus limit of 4 reached. Processor 7/0x7 ignored.
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0xff] high edge lint[0x1])
[ 0.000000] IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-23
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.000000] ACPI: IRQ0 used by override.
[ 0.000000] ACPI: IRQ9 used by override.
[ 0.000000] Using ACPI (MADT) for SMP configuration information
[ 0.000000] ACPI: HPET id: 0x8086a701 base: 0xfed00000
[ 0.000000] smpboot: 8 Processors exceeds NR_CPUS limit of 4
[ 0.000000] smpboot: Allowing 4 CPUs, 0 hotplug CPUs
.................

This only occurs on my i7 system, and older Core-Duo systems are OK. The system boots successfully, and runs without any problems..

Patched VMware 12.5.2, and NVIDIA 375.26, are both OK..

Robert Gadsdon. January 6, 2017.

Comments

Kernel – 4.9.1 Released, Still Getting ‘Too Many CPUs’ Warnings, on i7.. — 4 Comments

Segfault on January 9, 2017 at 01:29 said:

So how many CPU’s are enabled in the kernel config? You build your own kernel but you do not configure it?

Reply ↓
- RG on January 9, 2017 at 05:01 said:
  
  Configured for 4, of course.. I may need to check that some extra hotplug config has appeared..
  RG.
  
  Reply ↓
Harald Arnesen on January 18, 2017 at 17:34 said:

The kernel finds 8 processor (cores), but your kernel is only configured for 4.

Reply ↓
- RG on January 18, 2017 at 21:15 said:
  
  Kernel configured for 4, because there are only 4 cores.. 4.9.x is throwing a lot of ACPI ‘warnings’, as well, compared to 4.8.xx..
  RG.
  
  Reply ↓

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Kernel – 4.9.1 Released, Still Getting ‘Too Many CPUs’ Warnings, on i7..

Comments

Kernel – 4.9.1 Released, Still Getting ‘Too Many CPUs’ Warnings, on i7.. — 4 Comments

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