> From: Thomas Gleixner [mailto:tglx@xxxxxxxxxxxxx] > Sent: Tuesday, October 17, 2017 12:55 AM > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -95,7 +95,7 @@ config X86 > select GENERIC_IRQ_MATRIX_ALLOCATOR if X86_LOCAL_APIC > select GENERIC_IRQ_MIGRATION if SMP > select GENERIC_IRQ_PROBE > - select GENERIC_IRQ_SHOW > + select GENERIC_IRQ_RESERVATION_MODE > select GENERIC_PENDING_IRQ if SMP > select GENERIC_SMP_IDLE_THREAD > select GENERIC_STRNCPY_FROM_USER Hi Thomas, It looks you removed GENERIC_IRQ_SHOW by accident? I got this build error: ... LD vmlinux.o MODPOST vmlinux.o fs/proc/interrupts.o:(.rodata+0x118): undefined reference to `show_interrupts' Makefile:1000: recipe for target 'vmlinux' failed make: *** [vmlinux] Error 1 Adding GENERIC_IRQ_SHOW back can fix the build failure, and with the pachset Hyper-V PCI pass-through can work fine. Thanks, -- Dexuan