Jan Kiszka <jan.kiszka@xxxxxx> writes:
>> Yes, this is old kernel (2.6.9), and is not using HPET
>> (CONFIG_HPET_TIMER=n), using IO-APIC as NMI source (PMU seems to be
>> unsupported on kvm for now).
>>
>> Unfortunately, -no-hpet didn't change situation. irq_stat.apic_timer_irqs
>> and nmi_count() are same while irq is disabled.
>
> Maybe it's a regression of latest NMI injection patches.
>
> This worked before? Can you check if commits
> c2dd554dc61173ecb6b3741b680d2ae4c245d2ba and
> f86368493ec038218e8663cc1b6e5393cd8e008a have any impact on your problem?
Unfortunately, no. I've checked kvm_inject_nmi() was not called if irq
was disabled on guest.
The path is following (without my patch, kvm_apic_nmi_wd_deliver is not
called),
pit_do_work()
kvm_apic_nmi_wd_deliver()
kvm_apic_local_deliver()
__apic_accept_irq()
kvm_inject_nmi()
so it is not meaningful to change after kvm_inject_nmi() (if I'm
understanding commits correctly).
Thanks.
--
OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
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