qemu-dm segfault installing FreeBSD 32 bit FV on a heavily loaded machine

qemu-dm segfault installing FreeBSD 32 bit FV on a heavily loaded machine

[Richard W.M. Jones]

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I'm seeing a segfault in qemu-dm when installing FreeBSD 6.2 32 bit 
fullvirt on a 64 bit 4-core AMD machine.  The segfault only occurs (or 
at least is much more common) when the machine is heavily loaded.  In 
this case, doing 'make -j 4' kernel compile in the background.  There 
are no other domUs running.

The symptom is that while FreeBSD is downloading and installing 
packages, qemu-dm segfaults with dmesg output like this:

qemu-dm[10011]: segfault at 0000000000000000 rip 0000000000000000 rsp
0000000041400c18 error 14

Xen 3.1 from xen-3.1-testing.hg which I cloned this afternoon.

Fedora 7 with all latest updates applied; in particular the 
2.6.20-2925.8.fc7xen kernel.

I started a Fedora BZ entry for this here:

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=240009

It seems similar, but not the same as this: 
http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=542, but note 
that I've only got one FV domain running (indeed only one domU running 
at all).

Rich.

-- 
Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/
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