On Mon, Feb 07, 2011 at 02:39:01PM +0200, Avi Kivity wrote:
> On 02/07/2011 08:00 AM, Jonathan Nieder wrote:
> >Hi kvm-ers,
> >
> >When I boot the HURD with
> >
> > kvm -m 768 -net nic,model=ne2k_pci -net user hurd-installed.qemu
> >
> >it hangs and eventually produces two messages:
> >
> > hd0: unexpected_intr: status=0x58 { DriveReady SeekComplete DataRequest }
> > hd0: irq timeout: status=0x58 { DriveReady Seek Complete DataRequest }
> >
> >More details below[1].
> >
> >Adding -no-kvm-irqchip to the kvm command line fixes it --- no
> >more hangs or confusing messages (thanks, Guillem!).
> >
> >Bisects (thanks to Michael for the idea) to
> >
> > v2.6.37-rc1~142^2~39 (KVM: Check for pending events before
> > attempting injection, 2010-07-27).
> >
> >Bisection log and kernel configuration available upon request (but
> >probably not too relevant --- the 2.6.37 distro kernel from Debian
> >exhibits the same problem). Reproducible with kvm/master (2d4b4d26,
> >2011-02-01).
> >
> >CPU is a dual-core AMD Athlon II P360, family 16, model 6.
> >
> >Any hints for tracking this down? For those wanting to follow along
> >at home, you can find a HURD cd to try at [2].
> >
>
> Reproduced on AMD, not on Intel. Given that I see a few PIC and PIT
> PIOs before the hang, the problem is likely at the PIT. Will look
> further.
>
I can reproduce it on Intel. Looking into it. Looks like PIC isr_ack
problem again.
--
Gleb.
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