Re: [libvirt PATCH v3 00/21] Add support for persistent mediated devices

> Tested with v6.10.0-283-g1948d4e61e. > > 1.Can define/start/destroy mdev device successfully; > > 2.'virsh nodedev-list' has no '--active' option, which is > inconsistent with the description in the patch： > # virsh nodedev-list --active > error: command 'nodedev-list' doesn't support option --active > > 3.virsh client hang when trying to destroy a mdev device which is > using by a vm, and after that all 'virsh nodev*' cmds will hang. If > restarting llibvirtd after that, libvirtd will hang. It hangs because underneath a write to the 'remove' sysfs attribute is now blocking for some reason and since we're relying on mdevctl to do it for us, hence "it hangs". I'm not trying to make an excuse, it's plain wrong. I'd love to rely on such a basic functionality, but it looks like we'll have to go with a extremely ugly workaround and try to get the list of active domains from the nodedev driver and see whether any of them has the device assigned before we try to destroy the mdev via the nodedev driver.