[Qemu-devel] Re: ACPI weirdness with SVN head

[Jan Kiszka <jan.kiszka@web.de>]

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Erik de Castro Lopo wrote:
> Erik de Castro Lopo wrote:
> 
>> Is this a known problem?
> 
> More info. If I disable ACPI with -no-acpi the VM boots but
>  then chews up far more of the host CPU than previously. The
> only real explanation I can find for this on the guest side
> is a very high number of timer interrupts:
> 
>     guest > cat /proc/interrupts 
>                CPU0       
>       0:    2575369    XT-PIC-XT        timer
>       1:          9    XT-PIC-XT        i8042
>       2:          0    XT-PIC-XT        cascade
>       4:        536    XT-PIC-XT        serial
>       8:          0    XT-PIC-XT        rtc0
>       9:          0    XT-PIC-XT        virtio0
>      11:        202    XT-PIC-XT        virtio1, eth0
>      12:        111    XT-PIC-XT        i8042
>      14:       4176    XT-PIC-XT        ata_piix
>      15:       3676    XT-PIC-XT        ata_piix
>     NMI:          0   Non-maskable interrupts
>     LOC:          0   Local timer interrupts
>     RES:          0   Rescheduling interrupts
>     CAL:          0   function call interrupts
>     TLB:          0   TLB shootdowns
>     TRM:          0   Thermal event interrupts
>     THR:          0   Threshold APIC interrupts
>     SPU:          0   Spurious interrupts
>     ERR:          0
> 
> Cheers,
> Erik

I stumbled over the same problem with one of my Linux guests [1], but as
the one that locked up was built without CONFIG_ACPI, I concluded that
this is the problem (it missed that pin1 became 2, just like your guest
does). Have you updated your BIOS image?

Jan

[1] http://comments.gmane.org/gmane.comp.emulators.qemu/37767


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