Messages in this thread | | | Date | Thu, 11 Nov 2004 18:11:12 -0700 (MST) | From | Zwane Mwaikambo <> | Subject | Re: How could smp_error_interrupt get activated on x86? |
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On Fri, 12 Nov 2004, Nigel Cunningham wrote:
> I can't for the life of me figure out how one of my suspend2 users could > get this on a 2.6.9 kernel: > > > Software Suspend 2.1.4: Initiating a software suspend cycle. > > ACPI: PCI Interrupt Link [ALKA] BIOS reported IRQ 0, using IRQ 20 > > ACPI: PCI Interrupt Link [ALKB] BIOS reported IRQ 0, using IRQ 21 > > ACPI: PCI Interrupt Link [ALKC] BIOS reported IRQ 0, using IRQ 22 > > ACPI: PCI Interrupt Link [ALKD] BIOS reported IRQ 0, using IRQ 23 > > APIC error on CPU0: 00(00) > > ACPI: PCI interrupt 0000:00:0f.0[A] -> GSI 20 (level, low) -> IRQ 177 > > ACPI: PCI interrupt 0000:00:11.5[C] -> GSI 22 (level, low) -> IRQ 193 > > Please include the following information in bug reports: > > - SUSPEND core : 2.1.4 > > [...] > > > > All work fine. > > Processor and motherboard Athlon Barton 2500+@3200+, EPoX 8KRAI > (KT600). > > > > What is APIC error CPU0: 00(00)? > > I know it's really no error (according to the code), but I can't even > see how the function gets called in the first place: > > find -type f | xargs grep smp_error_interrupt > ./arch/i386/kernel/apic.c:asmlinkage void smp_error_interrupt(void) > ./arch/x86_64/kernel/apic.c:asmlinkage void smp_error_interrupt(void) > ./arch/x86_64/kernel/entry.S: apicinterrupt ERROR_APIC_VECTOR,smp_error_interrupt
Ahhh y'see it's by BUILD_INTERRUPT magik;
arch/i386/kernel/entry.S defines BUILD_INTERRUPT, then includes; include/asm-i386/mach-default/entry_arch.h which does;
BUILD_INTERRUPT(error_interrupt,ERROR_APIC_VECTOR)
Which results in the IDT stub being created for ERROR_APIC_VECTOR
Neat huh? ;)
Regarding your error, has the IOAPIC resumed when you get there?
Zwane
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