Re: boot stops after console handover?

[Antoine Martin <antoine-pzR7fkEi+fEqdlJmJB21zg@public.gmane.org>]

Carlo Marcelo Arenas Belon wrote:
> On Mon, Jan 07, 2008 at 07:30:44PM +0000, Antoine Martin wrote:
>> Avi Kivity wrote:
>>> Antoine Martin wrote:
>>>> Hi,
>>>>
>>>> Trying to boot KVM on a Core2Duo system, kvm-59 + linux-2.6.23.12
>>>> Booting with:
>>>> qemu-system-x86_64 -hda /home/uml/BusyBox-1.5.0-amd64-root_fs -m 384
>>>> - -nographic -cpu qemu64 -kernel /boot/vmlinuz-2.6.23.12 -append
>>>> "earlyprintk=serial,ttyS0,115200"
>>>>
>>>>   
>>> Does regular boot (without -kernel) work?
>>>
>> Nope, it's just spinning at 100% cpu, tried stock 2.6.23.12 and
>> 2.6.24-rc6, lots of clock_gettime(CLOCK_MONOTONIC,...
> 
> this is a big guess as I have no way to test it or know the internals well
> enough to come with an authoritative answer, but I remember having a similar
> problem once which was fixed by using the kernel option "nolapic"
I assume this is for the host? (no effect on the guest) unfortunately
that box won't boot with nolapic, the sata controllers timeout.
(although I haven't tried turning apic off in the bios)

>> Do I need to enable/disable some RTC / HPET options?
> 
> there used to be a bug about it before which was closed by the reported
> even though I was able to reproduce it after all (haven't looked since) and it
> was related to the use of CONFIG_HPET_EMULATE_RTC=y in the guest kernel.
I've disabled that, and everything else I could trim. Still no luck :(

> sorry for not giving you any hard evidence, but I am just going from memory
> here and though I would mention it just in case it could help.
Thanks, much appreciated.

gdb gives me this, dunno if this helps:
#0  0x00002b231784d777 in ioctl () from /lib/libc.so.6
#1  0x00000000600ef2df in kvm_run (kvm=0x62541010, vcpu=0) at libkvm.c:901
#2  0x000000006008bdb6 in kvm_cpu_exec (env=<value optimized out>) at
/usr/src/kvm-59/qemu/qemu-kvm.c:143
#3  0x000000006008bf80 in kvm_main_loop_cpu (env=0x62546100) at
/usr/src/kvm-59/qemu/qemu-kvm.c:341
#4  0x00000000600108f7 in main (argc=8, argv=0x7fff9422e758) at
/usr/src/kvm-59/qemu/vl.c:7771

Which is this:
        r = ioctl(fd, KVM_RUN, 0);
where
        int fd = kvm->vcpu_fd[vcpu];

Antoine

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