diff options
| author | Andi Kleen <andi@firstfloor.org> | 2009-05-27 21:56:52 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-06-03 14:40:38 -0700 |
| commit | 01ca79f1411eae2a45352709c838b946b1af9fbd (patch) | |
| tree | 6ee0f5306363f112c6c417c0db85b6d81753f5f8 /arch/x86/kernel/cpu/mcheck/mce.c | |
| parent | 48b1fddbb100a64f3983ca9768b8ea629a09aa20 (diff) | |
| download | lwn-01ca79f1411eae2a45352709c838b946b1af9fbd.tar.gz lwn-01ca79f1411eae2a45352709c838b946b1af9fbd.zip | |
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.c | 4 |
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 1d0aa9c4e15b..287268d21836 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; |