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authorAndi Kleen <andi@firstfloor.org>2009-05-27 21:56:52 +0200
committerH. Peter Anvin <hpa@zytor.com>2009-06-03 14:40:38 -0700
commit01ca79f1411eae2a45352709c838b946b1af9fbd (patch)
tree6ee0f5306363f112c6c417c0db85b6d81753f5f8 /arch/x86/kernel/irq.c
parent48b1fddbb100a64f3983ca9768b8ea629a09aa20 (diff)
downloadop-kernel-dev-01ca79f1411eae2a45352709c838b946b1af9fbd.zip
op-kernel-dev-01ca79f1411eae2a45352709c838b946b1af9fbd.tar.gz
x86, mce: add machine check exception count in /proc/interrupts
Useful for debugging, but it's also good general policy to have a counter for all special interrupts there. This makes it easier to diagnose where a CPU is spending its time. [ Impact: feature, debugging tool ] Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel/irq.c')
-rw-r--r--arch/x86/kernel/irq.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index a05660b..05fc635 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -12,6 +12,7 @@
#include <asm/io_apic.h>
#include <asm/irq.h>
#include <asm/idle.h>
+#include <asm/mce.h>
atomic_t irq_err_count;
@@ -94,6 +95,12 @@ static int show_other_interrupts(struct seq_file *p, int prec)
seq_printf(p, " Threshold APIC interrupts\n");
# endif
#endif
+#if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64)
+ seq_printf(p, "%*s: ", prec, "MCE");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", per_cpu(mce_exception_count, j));
+ seq_printf(p, " Machine check exceptions\n");
+#endif
seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
#if defined(CONFIG_X86_IO_APIC)
seq_printf(p, "%*s: %10u\n", prec, "MIS", atomic_read(&irq_mis_count));
@@ -161,6 +168,9 @@ u64 arch_irq_stat_cpu(unsigned int cpu)
{
u64 sum = irq_stats(cpu)->__nmi_count;
+#if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64)
+ sum += per_cpu(mce_exception_count, cpu);
+#endif
#ifdef CONFIG_X86_LOCAL_APIC
sum += irq_stats(cpu)->apic_timer_irqs;
sum += irq_stats(cpu)->irq_spurious_count;
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