It still happens with noapic.
--- normal CPU0 CPU1 0: 86876 0 IO-APIC-edge timer 7: 2 0 IO-APIC-edge parport0 8: 0 0 IO-APIC-edge rtc 9: 0 0 IO-APIC-level acpi 16: 2989 0 IO-APIC-level eth0 18: 0 0 IO-APIC-level uhci_hcd 20: 3714 0 IO-APIC-level libata 21: 330 0 IO-APIC-level uhci_hcd, ehci_hcd 22: 0 0 IO-APIC-level uhci_hcd 23: 3 0 IO-APIC-level uhci_hcd, Intel ICH NMI: 0 0 LOC: 86754 86807 ERR: 0 MIS: 0
-- with pci=noacpi CPU0 CPU1 0: 79266 0 IO-APIC-edge timer 2: 0 0 XT-PIC cascade 7: 2 0 IO-APIC-edge parport0 8: 0 0 IO-APIC-edge rtc 9: 0 0 IO-APIC-edge acpi 16: 2917 0 IO-APIC-level eth0 18: 0 0 IO-APIC-level uhci_hcd 20: 3662 0 IO-APIC-level libata 21: 314 0 IO-APIC-level uhci_hcd, ehci_hcd 22: 0 0 IO-APIC-level uhci_hcd 23: 1 0 IO-APIC-level uhci_hcd, Intel ICH NMI: 0 0 LOC: 79143 79088 ERR: 0 MIS: 0
It still happens with noapic.
--- normal
CPU0 CPU1
0: 86876 0 IO-APIC-edge timer
7: 2 0 IO-APIC-edge parport0
8: 0 0 IO-APIC-edge rtc
9: 0 0 IO-APIC-level acpi
16: 2989 0 IO-APIC-level eth0
18: 0 0 IO-APIC-level uhci_hcd
20: 3714 0 IO-APIC-level libata
21: 330 0 IO-APIC-level uhci_hcd, ehci_hcd
22: 0 0 IO-APIC-level uhci_hcd
23: 3 0 IO-APIC-level uhci_hcd, Intel ICH
NMI: 0 0
LOC: 86754 86807
ERR: 0
MIS: 0
-- with pci=noacpi
CPU0 CPU1
0: 79266 0 IO-APIC-edge timer
2: 0 0 XT-PIC cascade
7: 2 0 IO-APIC-edge parport0
8: 0 0 IO-APIC-edge rtc
9: 0 0 IO-APIC-edge acpi
16: 2917 0 IO-APIC-level eth0
18: 0 0 IO-APIC-level uhci_hcd
20: 3662 0 IO-APIC-level libata
21: 314 0 IO-APIC-level uhci_hcd, ehci_hcd
22: 0 0 IO-APIC-level uhci_hcd
23: 1 0 IO-APIC-level uhci_hcd, Intel ICH
NMI: 0 0
LOC: 79143 79088
ERR: 0
MIS: 0