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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/cpu/mcheck/mce.c
parent48b1fddbb100a64f3983ca9768b8ea629a09aa20 (diff)
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/cpu/mcheck/mce.c')
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 1d0aa9c4e15..287268d2183 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -57,6 +57,8 @@ int mce_disabled;
atomic_t mce_entry;
+DEFINE_PER_CPU(unsigned, mce_exception_count);
+
/*
* Tolerant levels:
* 0: always panic on uncorrected errors, log corrected errors
@@ -359,6 +361,8 @@ void do_machine_check(struct pt_regs *regs, long error_code)
atomic_inc(&mce_entry);
+ __get_cpu_var(mce_exception_count)++;
+
if (notify_die(DIE_NMI, "machine check", regs, error_code,
18, SIGKILL) == NOTIFY_STOP)
goto out;