kqemu locking my machine hard on amd64 smp, with most recent patches

[Todd Wasson]

I'm running 7.0-RELEASE.  The machine hangs when I use qemu,  
specifically with a linux VM, and more specifically after grub loads  
the kernel and it spits out the "Starting up ..." message.  Then...  
nothing.  Just before the crash, I see complaints about my sound  
hardware on the console; it doesn't seem related, but here it is:

oss: Could not initialize DAC
oss: Failed to open `/dev/dsp'
oss: Reason: No such file or directory
oss: Could not initialize DAC
oss: Failed to open `/dev/dsp'
oss: Reason: No such file or directory
audio: Failed to create voice `pcspk'
pcspk: Could not open voice

I haven't touched /usr/include since I used freebsd-update to go from  
the last RC to RELEASE, and I'm using the -RELEASE GENERIC kernel, so  
I presume they're in sync.  I am definitely loading the correct kqemu;  
I rebuilt it to check the md5sum against the one being loaded by  
kldload (in /boot/modules/).

I suspect I might need to enable kernel debugging.  I'll check the  
handbook and do that if necessary.  If need be, what should I be  
looking for / post?

Thanks a lot for your help.


Todd


On May 14, 2008, at 8:29 PM, Bakul Shah wrote:

> On Wed, 14 May 2008 17:08:27 EDT Todd Wasson <tsw5 at duke.edu>  wrote:
>> I've been following the discussion on this list about solving the SMP
>> amd64 kqemu issues pretty closely and have been testing out the
>> modules as I've gone along, and as of kqemu 1.3.0.p11_4 it was  
>> working
>> pretty well for me.  However, I just built kqemu 1.3.0.p11_6 and with
>> qemu 0.9.1_7 it's locking my machine up hard.  It isn't leaving me a
>> dump in /var/crash after I manually reset it, so I'm not sure what to
>> look for.  Without kqemu, it's running fine albeit expectedly slowly.
>> Does anyone have any suggestions for solutions, or ways to generate
>> logs of whatever the problem may be short of attaching a debugger or
>> something equally unwieldy?
>
> What kernel are you running? -current or -release?  When does
> the machine hang, when you load kqemu or when you try to use
> qemu?  What do you see on the console just before the crash?
>
> You may want to check some standard things: Is /usr/include
> in sync with the kernel? Are you loading the correct kqemu?
> Try rebuilding and reinstalling.
>
> If everything checks out and there is no print out on the console
> you may have to build a kernel with debugging on.