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Date: Fri, 25 Aug 2017 12:09:10 -0400 From: Steven Rostedt <rostedt@...dmis.org> To: Thomas Gleixner <tglx@...utronix.de> Cc: LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...nel.org>, Peter Anvin <hpa@...or.com>, Peter Zijlstra <peterz@...radead.org>, Andy Lutomirski <luto@...nel.org>, Borislav Petkov <bp@...en8.de> Subject: Re: [patch 12/41] x86/mce: Remove duplicated tracing interrupt code On Fri, 25 Aug 2017 12:31:15 +0200 Thomas Gleixner <tglx@...utronix.de> wrote: > --- a/arch/x86/kernel/cpu/mcheck/mce_amd.c > +++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c > @@ -776,24 +776,12 @@ static void __log_error(unsigned int ban > mce_log(&m); > } > > -static inline void __smp_deferred_error_interrupt(void) > -{ > - inc_irq_stat(irq_deferred_error_count); > - deferred_error_int_vector(); > -} > - > asmlinkage __visible void __irq_entry smp_deferred_error_interrupt(void) > { > entering_irq(); > - __smp_deferred_error_interrupt(); > - exiting_ack_irq(); > -} > - > -asmlinkage __visible void __irq_entry smp_trace_deferred_error_interrupt(void) > -{ > - entering_irq(); > trace_deferred_error_apic_entry(DEFERRED_ERROR_VECTOR); > - __smp_deferred_error_interrupt(); > + inc_irq_stat(irq_deferred_error_count); Here we do the inc_irq_stat() after the tracepoint (same as the original). > + deferred_error_int_vector(); > trace_deferred_error_apic_exit(DEFERRED_ERROR_VECTOR); > exiting_ack_irq(); > } > --- a/arch/x86/kernel/cpu/mcheck/therm_throt.c > +++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c > @@ -390,26 +390,12 @@ static void unexpected_thermal_interrupt > > static void (*smp_thermal_vector)(void) = unexpected_thermal_interrupt; > > -static inline void __smp_thermal_interrupt(void) > -{ > - inc_irq_stat(irq_thermal_count); > - smp_thermal_vector(); > -} > - > -asmlinkage __visible void __irq_entry > -smp_thermal_interrupt(struct pt_regs *regs) > -{ > - entering_irq(); > - __smp_thermal_interrupt(); > - exiting_ack_irq(); > -} > - > -asmlinkage __visible void __irq_entry > -smp_trace_thermal_interrupt(struct pt_regs *regs) > +asmlinkage __visible void __irq_entry smp_thermal_interrupt(struct pt_regs *r) > { > entering_irq(); > + inc_irq_stat(irq_thermal_count); > trace_thermal_apic_entry(THERMAL_APIC_VECTOR); Here we do the inc_irq_stat() after the tracepoint (swapped from the original). Was that intentional? > - __smp_thermal_interrupt(); > + smp_thermal_vector(); > trace_thermal_apic_exit(THERMAL_APIC_VECTOR); > exiting_ack_irq(); > } > --- a/arch/x86/kernel/cpu/mcheck/threshold.c > +++ b/arch/x86/kernel/cpu/mcheck/threshold.c > @@ -17,24 +17,12 @@ static void default_threshold_interrupt( > > void (*mce_threshold_vector)(void) = default_threshold_interrupt; > > -static inline void __smp_threshold_interrupt(void) > -{ > - inc_irq_stat(irq_threshold_count); > - mce_threshold_vector(); > -} > - > asmlinkage __visible void __irq_entry smp_threshold_interrupt(void) > { > entering_irq(); > - __smp_threshold_interrupt(); > - exiting_ack_irq(); > -} > - > -asmlinkage __visible void __irq_entry smp_trace_threshold_interrupt(void) > -{ > - entering_irq(); > trace_threshold_apic_entry(THRESHOLD_APIC_VECTOR); > - __smp_threshold_interrupt(); > + inc_irq_stat(irq_threshold_count); Back to inc_irq_stat() after the tracepoint. -- Steve > + mce_threshold_vector(); > trace_threshold_apic_exit(THRESHOLD_APIC_VECTOR); > exiting_ack_irq(); > } >
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