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[Xen-devel] qemu-dm segfault installing FreeBSD 32 bit FV on a heavily loaded machine

  • To: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Richard W.M. Jones" <rjones@xxxxxxxxxx>
  • Date: Mon, 14 May 2007 16:19:08 +0100
  • Delivery-date: Mon, 14 May 2007 08:17:41 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

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:


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).


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