Hi I was trying out the libxl backend of xen 4.3 with libvirt, but I found it very unstable and unusable. I'm in xen 4.3 dom0 and starting: 1. xen stuff: echo "Starting Xen..." /etc/init.d/xencommons start #/etc/init.d/xend start . /etc/rc.d/rc.xen_bridge start /etc/init.d/xendomains start #libvirtd -l -d hsflowd 2. Starting libvirt -v to see what is going on. After that I'm using virsh to do some simple tasks: virsh # list Id Name State ---------------------------------------------------- Where is dom0? virsh # create debian_pv.xml error: Failed to create domain from debian_pv.xml error: End of file while reading data: Input/output error error: One or more references were leaked after disconnect from the hypervisor error: Failed to reconnect to the hypervisor And log from libvirt: 2013-10-06 11:24:17.693+0000: 2162: debug : remoteDispatchDomainCreateXMLHelper:3017 : server=0x7fe92c017760 client=0x7fe92c029970 msg=0x7fe92c029520 rerr=0x7fe92511bd50 args=0x7fe90c000af0 ret=0x7fe90c000930 2013-10-06 11:24:17.693+0000: 2162: debug : virDomainCreateXML:1996 : conn=0x7fe904000a80, xmlDesc=<domain type='xen'> <name>debian_pv</name> <uuid>4590a985-69c1-4407-8517-da3da4673d9b</uuid> <memory unit='KiB'>262144</memory> <currentMemory unit='KiB'>262144</currentMemory> <vcpu placement='static' cpuset='1'>1</vcpu> <bootloader>pygrub</bootloader> <os> <type arch='x86_64' machine='xenpv'>linux</type> </os> <clock offset='utc' adjustment='reset'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <disk type='file' device='disk'> <driver name='file'/> <source file='/root/vms/debian_pv/debian_pv.img'/> <target dev='sda' bus='xen'/> </disk> <interface type='bridge'> <mac address='00:16:3e:59:78:01'/> <source bridge='xenbr0'/> </interface> <console type='pty'> <target type='xen' port='0'/> </console> <input type='mouse' bus='xen'/> <graphics type='vnc' autoport='no' listen='0.0.0.0'> <listen type='address' address='0.0.0.0'/> </graphics> </devices> </domain> , flags=0 2013-10-06 11:24:17.693+0000: 2162: debug : virObjectRef:293 : OBJECT_REF: obj=0x7fe914075300 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectRef:293 : OBJECT_REF: obj=0x7fe92c012fb0 2013-10-06 11:24:17.694+0000: 2162: debug : virAccessManagerCheckDomain:231 : manager=0x7fe92c012fb0(name=stack) driver=xenlight domain=0x7fe90c009130 perm=2 2013-10-06 11:24:17.694+0000: 2162: debug : virAccessManagerCheckDomain:231 : manager=0x7fe92c017360(name=none) driver=xenlight domain=0x7fe90c009130 perm=2 2013-10-06 11:24:17.694+0000: 2162: debug : virAccessManagerCheckDomain:231 : manager=0x7fe92c012fb0(name=stack) driver=xenlight domain=0x7fe90c009130 perm=4 2013-10-06 11:24:17.694+0000: 2162: debug : virAccessManagerCheckDomain:231 : manager=0x7fe92c017360(name=none) driver=xenlight domain=0x7fe90c009130 perm=4 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7fe92c012fb0 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectNew:199 : OBJECT_NEW: obj=0x7fe90c002d10 classname=virDomainObj 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectNew:199 : OBJECT_NEW: obj=0x7fe90c005b60 classname=libxlDomainObjPrivate 2013-10-06 11:24:17.694+0000: 2162: debug : virDomainObjNew:2063 : obj=0x7fe90c002d10 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectRef:293 : OBJECT_REF: obj=0x7fe914075300 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectRef:293 : OBJECT_REF: obj=0x7fe914075300 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7fe914075300 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCleanupTimeouts:517 : Cleanup 2 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCleanupHandles:565 : Cleanup 11 2013-10-06 11:24:17.694+0000: 2158: debug : virEventRunDefaultImpl:271 : running default event implementation 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCleanupTimeouts:517 : Cleanup 2 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCleanupHandles:565 : Cleanup 11 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=0 w=1, f=5 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=1 w=2, f=7 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=2 w=3, f=9 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=3 w=4, f=10 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=4 w=5, f=11 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=5 w=6, f=12 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=6 w=7, f=13 e=0 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=7 w=8, f=13 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=8 w=9, f=14 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=9 w=34, f=21 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=10 w=36, f=22 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCalculateTimeout:332 : Calculate expiry of 2 timers 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCalculateTimeout:340 : Got a timeout scheduled for 1381058662693 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCalculateTimeout:353 : Schedule timeout then=1381058662693 now=1381058657694 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCalculateTimeout:362 : Timeout at 1381058662693 due in 4999 ms 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollRunOnce:630 : EVENT_POLL_RUN: nhandles=10 timeout=4999 2013-10-06 11:24:17.707+0000: 2162: debug : virFileClose:90 : Closed fd 28 2013-10-06 11:24:17.726+0000: 2162: error : libxlVmStart:627 : internal error: libxenlight failed to create new domain 'debian_pv' 2013-10-06 11:24:17.726+0000: 2162: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7fe914075300 2013-10-06 11:24:17.726+0000: 2162: debug : virObjectRef:293 : OBJECT_REF: obj=0x7fe90c002d10 2013-10-06 11:24:17.726+0000: 2162: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7fe90c002d10 2013-10-06 11:24:17.726+0000: 2162: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7fe90c002d10 2013-10-06 11:24:17.726+0000: 2162: debug : virObjectUnref:258 : OBJECT_DISPOSE: obj=0x7fe90c002d10 2013-10-06 11:24:17.726+0000: 2162: debug : virDomainObjDispose:2029 : obj=0x7fe90c002d10 2013-10-06 11:24:17.727+0000: 2162: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7fe90c005b60 2013-10-06 11:24:17.727+0000: 2162: debug : virObjectUnref:258 : OBJECT_DISPOSE: obj=0x7fe90c005b60 ====== end of log ===== Segmentation fault Why crash? Am I doing something wrong? -- pozdr0 dienet "Old C programmers never die. They're just cast into void."