On Wed, Jan 12, 2011 at 03:51:13PM +0100, Philipp Hahn wrote: > Hello, > > libvirt implements a manages save, which suspens a VM to a file, from which it > can be resumed later. This uses Qemus/Kvms "migrate exec:<file>" feature. > This doesn't work reliable for me: In may cases the resumed VM seems to be > stuck: its VNC console is restored, but no key presses or network packages > are accepted. This both happens with Windows XP, 7, 2008 and Linux 2.6.32 > systems. > > Using the debugging cycle described below in more detail I was able to track > the problem down to interrupt handling: Either the Linux-guest-kernel > constantly receives an interrupt for the 8139cp network adapter, or no > interrupts at all (neither network nor keyboard nor timer); only sending a > NMI works and shows that at least the Linux-Kernel is still alive. > > If I add the -no-kvm-irqchip Option, it seems to work; I was not able to > reproduce a hang. I remember reporting a bug with that scenario 4/5 months back and it being fixed in the host kernel IIRC. Daniel -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
