Re: FreeBSD boot hangs on qemu-kvm on AMD host

[Avi Kivity <avi@redhat.com>]

On 03/09/2011 02:06 PM, Michael Tokarev wrote:
> Hello.
>
> Dominik Klein (Cc'd) reported on irc that current
> FreeBSD release hangs at boot in qemu-kvm.  It is
> trivially verifiable by d/loading the bootonly
> FreeBSD 8.2 CD image from ftp.freebsd.org and
> running
>
>    kvm -cdrom FreeBSD-8.2-RELEASE-amd64-bootonly.iso.
>
> The guest unpacks kernel, draws a menu (apparently
> in real kernel already, not in the boot loader) and
> starts a 10-second countdown.  At this point it just
> stops (either at 10 or 9, ie, right at the beginning
> of the cycle) and kvm process starts using 100% of
> the CPU core given to it.  With this typical kvm_stats
> from qemu-kvm 0.14:
>
> kvm statistics
>
>   exits                                     43397783 1400960
>   halt_exits                                42862622 1400769
>   irq_exits                                     5487     172
>   host_state_reload                           300074     101
>   io_exits                                    292212      18
>   irq_injections                                 768      18
>   halt_wakeup                                    257       3
>   mmu_pte_write                              7702163       0
>   insn_emulation                              378273       0
>   mmio_exits                                   15786       0
>   pf_fixed                                      4817       0
>   mmu_shadow_zapped                              170       0
>   mmu_cache_miss                                 151       0
>   remote_tlb_flush                                 2       0
>   signal_exits                                     1       0
>   fpu_reload                                       1       0
>
>
> I tried i386 and amd64 guest images, and tried the same
> thing with qemu-kvm 0.12.5 and 0.14.0 - the effect is
> exactly the same.
>
> So far the 3 affected systems where we tried this are all
> AMD machines.  My home box is AthlonII, my work box is
> PhenomI 9750, and Dominik tries it on Opteron 6174.
>

Can't reproduce.  What host kernel version are you using?

Please post the output of

   info register

   x/50i $eip-30

on the qemu monitor.

-- 
error compiling committee.c: too many arguments to function