Re: [libvirt] [RFC PATCH] udev: Remove udev handle from main loop when udev thread stops

Commit "nodedev: Move device enumumeration out of nodeStateInitialize" (9f0ae0b18e3e620) has moved the heavy task of device enumeration into a separate thread. The problem with this commit is that there is a functionality change in the cleanup when udevEnumerateDevices fails. Before commit 9f0ae0b18e3e620, the entire driver was cleaned up by calling nodeStateCleanup (defined in node_device_udev.c) which resulted in libvirtd stopping with the error message 'daemonRunStateInit:800 : Driver state initialization failed'. With the commit 9f0ae0b18e3e620 there is only a signal to the udev thread that it must stop. This means that for example the watch handle isn't removed from the main loop and this can result in the main loop consuming 100% CPU time as soon as a new udev event occurs. This patch proposes a simple solution to the described problem. In case the udev thread stops the watch handle is removed from the main loop.