Joe Korty <[email protected]> writes:
> spurious interrupts
>
> A threshold interrupt occurs when ECC memory correction
> is occuring at too high a frequency.
It's configurable and the default is off. Also
it's only on AMD hardware.
Your description is a little misleading.
> Thresholds are used
> by the ECC hardware as occasional ECC failures are part
> of normal operation,
Not really.
> ===================================================================
> --- 2.6.23-rc1-git7.orig/arch/i386/kernel/apic.c 2007-07-30 19:08:05.000000000 -0400
> +++ 2.6.23-rc1-git7/arch/i386/kernel/apic.c 2007-07-30 19:08:07.000000000 -0400
> @@ -1280,6 +1280,7 @@
> printk(KERN_INFO "spurious APIC interrupt on CPU#%d, "
> "should never happen.\n", smp_processor_id());
> irq_exit();
> + __get_cpu_var(irq_stat).irq_spur_counts++;
Wouldn't it be safer on preemptible kernels to have that inside
the irq_exit?
> }
>
> /*
> Index: 2.6.23-rc1-git7/arch/i386/kernel/cpu/mcheck/p4.c
> ===================================================================
> --- 2.6.23-rc1-git7.orig/arch/i386/kernel/cpu/mcheck/p4.c 2007-07-30 19:08:05.000000000 -0400
> +++ 2.6.23-rc1-git7/arch/i386/kernel/cpu/mcheck/p4.c 2007-07-30 19:08:07.000000000 -0400
> @@ -62,6 +62,7 @@
> irq_enter();
> vendor_thermal_interrupt(regs);
> irq_exit();
> + __get_cpu_var(irq_stat).irq_thermal_counts++;
> }
>
> /* P4/Xeon Thermal regulation detect and init */
> Index: 2.6.23-rc1-git7/arch/i386/kernel/irq.c
> ===================================================================
> --- 2.6.23-rc1-git7.orig/arch/i386/kernel/irq.c 2007-07-30 19:08:05.000000000 -0400
> +++ 2.6.23-rc1-git7/arch/i386/kernel/irq.c 2007-07-31 09:40:58.000000000 -0400
> @@ -284,14 +284,41 @@
> seq_printf(p, "NMI: ");
> for_each_online_cpu(j)
> seq_printf(p, "%10u ", nmi_count(j));
> - seq_putc(p, '\n');
> + seq_printf(p, " Non-maskable interrupts\n");
> #ifdef CONFIG_X86_LOCAL_APIC
> seq_printf(p, "LOC: ");
> for_each_online_cpu(j)
> seq_printf(p, "%10u ",
> per_cpu(irq_stat,j).apic_timer_irqs);
> - seq_putc(p, '\n');
> + seq_printf(p, " Local interrupts\n");
> #endif
> +#ifdef CONFIG_SMP
> + seq_printf(p, "RES: ");
I think it would be better to use 5-6 char identifiers even
when it whacks the columns a bit; otherwise
nobody will know what it means. e.g. SCHED here.
Also there you should update proc(5) and send a patch
to the manpage maintainer.
> Index: 2.6.23-rc1-git7/arch/x86_64/kernel/apic.c
> ===================================================================
> --- 2.6.23-rc1-git7.orig/arch/x86_64/kernel/apic.c 2007-07-30 19:08:05.000000000 -0400
> +++ 2.6.23-rc1-git7/arch/x86_64/kernel/apic.c 2007-07-30 19:08:07.000000000 -0400
> @@ -1118,6 +1118,7 @@
> asmlinkage void smp_spurious_interrupt(void)
> {
> unsigned int v;
> +
Don't add white space.
-Andi
-
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