KVM localhost(qemu)--connecting卡死

KVM localhost(qemu)-connecting卡死

参考文档：

http://wiki.libvirt.org/page/Failed_to_connect_to_the_hypervisor

https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.3_Technical_Notes/libvirt.html

https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Host_Configuration_and_Guest_Installation_Guide/App_TCP_Ports.html

场景：VM workstation12安装Ubuntu12.04 x64跟kvm

现象：virsh命令直接卡死，virt-manager提示“没有活跃连接可用于安装"，关机重启命令无效只能断电

原因：libvirtd调用子进程dmidecode超时至无法响应，可能和VM workstation的兼容性有关

解决办法：killall dmidecode

杀掉dmidecode后，kvm立马就正常了，关机重启也正常了