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x86, mce: add MCE poll count to /proc/interrupts

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Keep a count of the machine check polls (or CMCI events) in
/proc/interrupts.

Andi needs this for debugging, but it's also useful in general
to see what's going in by the kernel.

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>
This commit is contained in:
Andi Kleen 2009-05-27 21:56:57 +02:00 committed by H. Peter Anvin
parent 01ca79f141
commit ca84f69697
3 changed files with 9 additions and 0 deletions
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1
arch/x86/include/asm/mce.h
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@ -125,6 +125,7 @@ static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { }
int mce_available(struct cpuinfo_x86 *c);
DECLARE_PER_CPU(unsigned, mce_exception_count);
DECLARE_PER_CPU(unsigned, mce_poll_count);
void mce_log_therm_throt_event(__u64 status);

4
arch/x86/kernel/cpu/mcheck/mce.c
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@ -264,6 +264,8 @@ static inline void mce_get_rip(struct mce *m, struct pt_regs *regs)
}
}
DEFINE_PER_CPU(unsigned, mce_poll_count);
/*
* Poll for corrected events or events that happened before reset.
* Those are just logged through /dev/mcelog.
@ -275,6 +277,8 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
struct mce m;
int i;
__get_cpu_var(mce_poll_count)++;
mce_setup(&m);
m.mcgstatus = mce_rdmsrl(MSR_IA32_MCG_STATUS);

4
arch/x86/kernel/irq.c
View File

@ -100,6 +100,10 @@ static int show_other_interrupts(struct seq_file *p, int prec)
for_each_online_cpu(j)
seq_printf(p, "%10u ", per_cpu(mce_exception_count, j));
seq_printf(p, " Machine check exceptions\n");
seq_printf(p, "%*s: ", prec, "MCP");
for_each_online_cpu(j)
seq_printf(p, "%10u ", per_cpu(mce_poll_count, j));
seq_printf(p, " Machine check polls\n");
#endif
seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
#if defined(CONFIG_X86_IO_APIC)