On 07.02.2014 09:06, yue wrote:
hi,all we can pass value throught xml when start vm. how to adjust the value dynamicly as needed while vm is running via API calls? for example , change from <filterref filter='hcount'> <parameter name='HC' value='6'/> <parameter name='HC' value='10'/> </filterref> to <filterref filter='hcount'> <parameter name='HC' value='16'/> <parameter name='HC' value='20'/> </filterref> i do not want to restart or interrupt the running state of vms(via api, not command line tools).
These (or any other values) can be changed byt re-defining the domain again: char *xml = virDomainGetXMLDesc(); /* change the desired values in @xml */ virDomainDefine(conn, xml); free(xml); However, this works only on 'config' level - the changes will be applied the next time domain is started. For a runtime change, maybe you can use virDomainUpdateDeviceFlags() but I haven't try if it works with <filterref/>. Michal