patch-2_6_7-vs1_9_1_12

[linux-2.6.git] / arch / i386 / kernel / cpu / mcheck / p4.c

diff --git a/arch/i386/kernel/cpu/mcheck/p4.c b/arch/i386/kernel/cpu/mcheck/p4.c
index abb817f..b31fc00 100644 (file)
--- a/arch/i386/kernel/cpu/mcheck/p4.c
+++ b/arch/i386/kernel/cpu/mcheck/p4.c
@@ -38,7 +38,8 @@ static int mce_num_extended_msrs = 0;
 #ifdef CONFIG_X86_MCE_P4THERMAL
 static void unexpected_thermal_interrupt(struct pt_regs *regs)
 {      
-       printk(KERN_ERR "CPU#%d: Unexpected LVT TMR interrupt!\n", smp_processor_id());
+       printk(KERN_ERR "CPU%d: Unexpected LVT TMR interrupt!\n",
+                       smp_processor_id());
 }
 
 /* P4/Xeon Thermal transition interrupt handler */
@@ -46,15 +47,21 @@ static void intel_thermal_interrupt(struct pt_regs *regs)
 {
        u32 l, h;
        unsigned int cpu = smp_processor_id();
+       static unsigned long next[NR_CPUS];
 
        ack_APIC_irq();
 
-       rdmsr (MSR_IA32_THERM_STATUS, l, h);
-       if (l & 1) {
-               printk(KERN_EMERG "CPU#%d: Temperature above threshold\n", cpu);
-               printk(KERN_EMERG "CPU#%d: Running in modulated clock mode\n", cpu);
+       if (time_after(next[cpu], jiffies))
+               return;
+
+       next[cpu] = jiffies + HZ*5;
+       rdmsr(MSR_IA32_THERM_STATUS, l, h);
+       if (l & 0x1) {
+               printk(KERN_EMERG "CPU%d: Temperature above threshold\n", cpu);
+               printk(KERN_EMERG "CPU%d: Running in modulated clock mode\n",
+                               cpu);
        } else {
-               printk(KERN_INFO "CPU#%d: Temperature/speed normal\n", cpu);
+               printk(KERN_INFO "CPU%d: Temperature/speed normal\n", cpu);
        }
 }
 
@@ -89,13 +96,15 @@ static void __init intel_init_thermal(struct cpuinfo_x86 *c)
        rdmsr (MSR_IA32_MISC_ENABLE, l, h);
        h = apic_read(APIC_LVTTHMR);
        if ((l & (1<<3)) && (h & APIC_DM_SMI)) {
-               printk(KERN_DEBUG "CPU#%d: Thermal monitoring handled by SMI\n", cpu);
+               printk(KERN_DEBUG "CPU%d: Thermal monitoring handled by SMI\n",
+                               cpu);
                return; /* -EBUSY */
        }
 
        /* check whether a vector already exists, temporarily masked? */        
        if (h & APIC_VECTOR_MASK) {
-               printk(KERN_DEBUG "CPU#%d: Thermal LVT vector (%#x) already installed\n",
+               printk(KERN_DEBUG "CPU%d: Thermal LVT vector (%#x) already "
+                               "installed\n",
                        cpu, (h & APIC_VECTOR_MASK));
                return; /* -EBUSY */
        }
@@ -116,7 +125,7 @@ static void __init intel_init_thermal(struct cpuinfo_x86 *c)
        
        l = apic_read (APIC_LVTTHMR);
        apic_write_around (APIC_LVTTHMR, l & ~APIC_LVT_MASKED);
-       printk (KERN_INFO "CPU#%d: Thermal monitoring enabled\n", cpu);
+       printk (KERN_INFO "CPU%d: Thermal monitoring enabled\n", cpu);
        return;
 }
 #endif /* CONFIG_X86_MCE_P4THERMAL */
@@ -247,7 +256,8 @@ void __init intel_p4_mcheck_init(struct cpuinfo_x86 *c)
        rdmsr (MSR_IA32_MCG_CAP, l, h);
        if (l & (1<<9)) {/* MCG_EXT_P */
                mce_num_extended_msrs = (l >> 16) & 0xff;
-               printk (KERN_INFO "CPU#%d: Intel P4/Xeon Extended MCE MSRs (%d) available\n",
+               printk (KERN_INFO "CPU%d: Intel P4/Xeon Extended MCE MSRs (%d)"
+                               " available\n",
                        smp_processor_id(), mce_num_extended_msrs);
 
 #ifdef CONFIG_X86_MCE_P4THERMAL