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authorAndi Kleen <andi@firstfloor.org>2009-05-27 21:56:57 +0200
committerH. Peter Anvin <hpa@zytor.com>2009-06-03 14:40:38 -0700
commitca84f69697da0f004135e45b63ca560b6bd3554e (patch)
tree0106ff5c8a2def169e7d2900071b6543d6c4dc6a
parent01ca79f1411eae2a45352709c838b946b1af9fbd (diff)
x86, mce: add MCE poll count to /proc/interrupts
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>
-rw-r--r--arch/x86/include/asm/mce.h1
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce.c4
-rw-r--r--arch/x86/kernel/irq.c4
3 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 1156dae295a..63abf3b1943 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -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);
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 287268d2183..784f6ae9d6f 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -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);
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 05fc635c28c..eff46b5de62 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -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)