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

[Anthony Liguori]

Jan Kiszka wrote:
> 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?
>   

This error happens if you're using an older version of the BIOS.

Regards,

Anthony Liguori

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