--- arch/x86/Kconfig

+++ arch/x86/Kconfig

@@ -753,6 +753,17 @@ config SCHED_MC

making when dealing with multi-core CPU chips at a cost of slightly

increased overhead in some places. If unsure say N here.

+config IRQ_TIME_ACCOUNTING

+ bool "Fine granularity task level IRQ time accounting"

+ default n

+ ---help---

+ Select this option to enable fine granularity task irq time

+ accounting. This is done by reading a timestamp on each

+ transitions between softirq and hardirq state, so there can be a

+ small performance impact.

+

+ If in doubt, say N here.

+

source "kernel/Kconfig.preempt"

config X86_UP_APIC