On Wed, Jul 04, 2012 at 12:03:58PM +0200, Peter Lieven wrote: > On 07/03/12 17:54, Marcelo Tosatti wrote: > >On Wed, Jun 27, 2012 at 12:35:22PM +0200, Peter Lieven wrote: > >>Hi, > >> > >>we recently came across multiple VMs racing and stopping working. It > >>seems to happen when the system is at 100% cpu. > >>One way to reproduce this is: > >>qemu-kvm-1.0.1 with vnc-thread enabled > >> > >>cmdline (or similar): > >>/usr/bin/qemu-kvm-1.0.1 -net > >>tap,vlan=141,script=no,downscript=no,ifname=tap15,vnet_hdr -net > >>nic,vlan=141,model=virtio,macaddr=52:54:00:ff:00:f7 -drive format=host_device,file=/dev/mapper/iqn.2001-05.com.equallogic:0-8a0906-efdf4e007-16700198c7f4fead-02-debug-race-hd01,if=virtio,cache=none,aio=native > >>-m 2048 -smp 2,sockets=1,cores=2,threads=1 -monitor > >>tcp:0:4026,server,nowait -vnc :26 -qmp tcp:0:3026,server,nowait > >>-name 02-debug-race -boot order=dc,menu=off -cdrom > >>/home/kvm/cdrom//root/ubuntu-12.04-server-amd64.iso -k de -pidfile > >>/var/run/qemu/vm-221.pid -mem-prealloc -cpu > >>host,+x2apic,model_id=Intel(R) Xeon(R) CPU L5640 @ > >>2.27GHz,-tsc -rtc base=utc -usb -usbdevice tablet -no-hpet -vga > >>cirrus > >Is it reproducible without vnc thread enabled? > Yes, it is. I tried it with and without. It is also even happnig > with 0.12.5 where > no vnc thread (and i think also iothread) is available. Do you have traces without vnc-thread enabled? -- 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
