linux-kernel - Re: [PATCH V3] tmp patch to fix hotplug issue in CMCI storm

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Message-ID: <50038790.6040707@linux.intel.com>
Date:	Mon, 16 Jul 2012 11:16:32 +0800
From:	Chen Gong <gong.chen@...ux.intel.com>
To:	Chen Gong <gong.chen@...ux.intel.com>
CC:	tglx@...utronix.de, tony.luck@...el.com, borislav.petkov@....com,
	peterz@...radead.org, x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3] tmp patch to fix hotplug issue in CMCI storm

于 2012/7/4 16:12, Chen Gong 写道:
> 于 2012/6/19 14:09, Chen Gong 写道:
>> v3->v1
>> Thanks very much for Thomas' suggestion to simply the whole logic.
>>
>> Signed-off-by: Chen Gong <gong.chen@...ux.intel.com>
>> ---
>>   arch/x86/kernel/cpu/mcheck/mce-internal.h |    2 ++
>>   arch/x86/kernel/cpu/mcheck/mce.c          |    1 +
>>   arch/x86/kernel/cpu/mcheck/mce_intel.c    |   11 +++++++++++
>>   3 files changed, 14 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/x86/kernel/cpu/mcheck/mce-internal.h
>> b/arch/x86/kernel/cpu/mcheck/mce-internal.h
>> index 2cd73ce..6a05c1d 100644
>> --- a/arch/x86/kernel/cpu/mcheck/mce-internal.h
>> +++ b/arch/x86/kernel/cpu/mcheck/mce-internal.h
>> @@ -31,9 +31,11 @@ extern struct mce_bank *mce_banks;
>>   #ifdef CONFIG_X86_MCE_INTEL
>>   unsigned long mce_intel_adjust_timer(unsigned long interval);
>>   void mce_intel_cmci_poll(void);
>> +void mce_intel_hcpu_update(unsigned long cpu);
>>   #else
>>   # define mce_intel_adjust_timer mce_adjust_timer_default
>>   static inline void mce_intel_cmci_poll(void) { }
>> +static inline void mce_intel_hcpu_update(unsigned long cpu) { }
>>   #endif
>>
>>   void mce_timer_kick(unsigned long interval);
>> diff --git a/arch/x86/kernel/cpu/mcheck/mce.c
>> b/arch/x86/kernel/cpu/mcheck/mce.c
>> index e3f8b94..5e22d99 100644
>> --- a/arch/x86/kernel/cpu/mcheck/mce.c
>> +++ b/arch/x86/kernel/cpu/mcheck/mce.c
>> @@ -2306,6 +2306,7 @@ mce_cpu_callback(struct notifier_block *nfb,
>> unsigned long action, void *hcpu)
>>           if (threshold_cpu_callback)
>>               threshold_cpu_callback(action, cpu);
>>           mce_device_remove(cpu);
>> +        mce_intel_hcpu_update(cpu);
>>           break;
>>       case CPU_DOWN_PREPARE:
>>           smp_call_function_single(cpu, mce_disable_cpu, &action, 1);
>> diff --git a/arch/x86/kernel/cpu/mcheck/mce_intel.c
>> b/arch/x86/kernel/cpu/mcheck/mce_intel.c
>> index 92d8b5c..693bc7d 100644
>> --- a/arch/x86/kernel/cpu/mcheck/mce_intel.c
>> +++ b/arch/x86/kernel/cpu/mcheck/mce_intel.c
>> @@ -77,6 +77,14 @@ void mce_intel_cmci_poll(void)
>>       machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
>>   }
>>
>> +void mce_intel_hcpu_update(unsigned long cpu)
>> +{
>> +    if (per_cpu(cmci_storm_state, cpu) == CMCI_STORM_ACTIVE)
>> +        atomic_dec(&cmci_storm_on_cpus);
>> +
>> +    per_cpu(cmci_storm_state, cpu) = CMCI_STORM_NONE;
>> +}
>> +
>>   unsigned long mce_intel_adjust_timer(unsigned long interval)
>>   {
>>       if (interval < CMCI_POLL_INTERVAL)
>> @@ -119,6 +127,9 @@ static bool cmci_storm_detect(void)
>>       unsigned long ts = __this_cpu_read(cmci_time_stamp);
>>       unsigned long now = jiffies;
>>
>> +    if (__this_cpu_read(cmci_storm_state) != CMCI_STORM_NONE)
>> +        return true;
>> +
>>       if (time_before_eq(now, ts + CMCI_STORM_INTERVAL)) {
>>           cnt++;
>>       } else {
>>
>
>
> Hi, Thomas
>
> How is going on for this patch and whole patch series? I don't know
> if you have updated it or not.

Hi, Thomas

Are you still care about this thread any more? Any plan to update it?
Hope to get your feedback ASAP.


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