On Fri, 2009-09-04 at 08:22 +0100, Mark McLoughlin wrote: > On Thu, 2009-09-03 at 19:18 -0300, Glauber Costa wrote: > > On Thu, Sep 3, 2009 at 6:48 PM, Dustin Kirkland<kirkland@xxxxxxxxxxxxx> wrote: > > > On Thu, Sep 3, 2009 at 3:01 PM, Mark McLoughlin<markmc@xxxxxxxxxx> wrote: > > >> On Thu, 2009-09-03 at 12:31 -0500, Dustin Kirkland wrote: > > >>> qemu-kvm: fix segfault when running kvm without /dev/kvm, falling back > > >>> to non-accelerated mode > > >>> > > >>> We're seeing segfaults on systems without access to /dev/kvm. It > > >>> looks like the global kvm_allowed is being set just a little too late > > >>> in vl.c. This patch moves the kvm initialization a bit higher in the > > >>> vl.c main, just after options processing, and solves the segfaults. > > >>> We're carrying this patch in Ubuntu 9.10 Alpha. Please apply > > >>> upstream, or advise if and why this might not be the optimal solution. > > >> > > >> Ah discussion about an alternative fix for this fizzled out recently: > > >> > > >> http://www.mail-archive.com/kvm@xxxxxxxxxxxxxxx/msg19890.html > > > > > > Ah, thanks Mark. In that thread, I found Daniel's suggestion the most > > > reasonable, and user-friendly: > > > > > > On Mon, Jul 27, 2009 at 1:44 PM, Daniel P. Berrange<berrange@xxxxxxxxxx> wrote: > > >> Well, we could go for logic like: > > >> > > >> * No arg given => try kvm, try kqemu, try tcg > > >> * --accelmode arg given => try $arg, and fail if unavailable > > >> > > >> then libvirt would simply always supply --accelmode for all VMs, > > >> while people running qemu manually would get best available > > I sent some patches to do that, but they were incomplete, and I was > > preempted by something else. > > If you want, you can wait for my cycles to come back, or pick from where I left Thanks for the pointer, Glauber. My cycles a bit constrained too, but I'll have a look when I get a chance. > In the meantime, can we commit to stable-0.11 either Dustin's fix or > this: > > http://git.et.redhat.com/?p=qemu-fedora.git;a=commitdiff;h=aa1620047b +1. We're looking for something agreeable in stable-0.11, that solves the segfault and proceeds without VT acceleration. -- :-Dustin Dustin Kirkland Canonical, LTD kirkland@xxxxxxxxxxxxx GPG: 1024D/83A61194
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