Messages in this thread Patch in this message | | | From | Chen Gong <> | Subject | [PATCH V3] tmp patch to fix hotplug issue in CMCI storm | Date | Tue, 19 Jun 2012 14:09:00 +0800 |
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v3->v1 Thanks very much for Thomas' suggestion to simply the whole logic.
Signed-off-by: Chen Gong <gong.chen@linux.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 { -- 1.7.1
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