Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH 23/31] x86: MCE: Add MCE poll count to /proc/interrupts | Date | Wed, 27 May 2009 01:54:25 +0200 |
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From: Andi Kleen <ak@linux.intel.com>
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> --- arch/x86/include/asm/mce.h | 1 + arch/x86/kernel/cpu/mcheck/mce.c | 4 ++++ arch/x86/kernel/irq.c | 4 ++++ 3 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index e958322..2c4209d 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -131,6 +131,7 @@ static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { } extern 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); diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index 04cb0d4..c511d05 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -374,6 +374,8 @@ static void mce_report_event(struct pt_regs *regs) #endif } +DEFINE_PER_CPU(unsigned, mce_poll_count); + /* * Poll for corrected events or events that happened before reset. * Those are just logged through /dev/mcelog. @@ -385,6 +387,8 @@ 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); diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index 14047b9..67f7916 100644 --- a/arch/x86/kernel/irq.c +++ b/arch/x86/kernel/irq.c @@ -102,6 +102,10 @@ 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) -- 1.6.0.2
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