On Thu, Jul 15, 2010 at 03:19:44PM +0200, Christoph Adomeit wrote: > Hi, > > we are running several kvm servers with kvm 0.12.4 and kernel 2.6.32 > (actually we run proxmox ve) > > These proxmox servers are running all kinds of vms rock-solid, be it > linux or windows 32 platforms. > > But one Windows 2008 64 Bit Server Standard is freezing regularly. > This happens sometimes 3 times a day, sometimes it takes 2 days > until freeze. The Windows Machine is a clean fresh install. > > By Freezing I mean that the Machine console still shows the > windows logo but does not accept any keystroke and does not answer > to ping or rdp or whatever. The virtual cpu-load is then shown > as 100% (by proxmox). > > We tried several combinations of ide or virtio, several virtual network cards (intel and realtek) and single-cpu vs multi cpu. The Problem persists. > > The Windows Machine is a quite fresh install but runs exchange and 10 rdp sessions. > > We are experienced linux-admins but we dont find any hints on the kvm servers what might be the problem, no syslogs,dmesgs, nothing. Also there are no > dumps on the windows guest. > > Do you have any hints what might be the problem and what we could do to debug the problem and to get more information of the root cause ? > When hang occurs ensure that problematic vm is the only on on the server and run kvm_stat. Send output here. Also do the following: # mount -t debugfs debugfs /sys/kernel/debug # echo kvm > /sys/kernel/debug/tracing/set_event # sleep 1 # cat /sys/kernel/debug/tracing/trace > /tmp/trace Send /tmp/trace here too, but it may be huge, so send only last 1000 lines. -- Gleb. -- 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
