Re: [libvirt] [RFC][PATCH] lxc: fix for ns cgroups subsystem

Hi, I've updated the patch. The change includes support for multiple mount points of cgroups that I didn't cope with in the previous patch. Through the work, I found a bit messy problem. Current lxc controller writes pid in a 'tasks' file multiple times if one mount point has multiple subsystems. It is bad because the first write changes the cgroups path of a controller, and then the second write points a missing file like $CGROUPS_MOUNTPOINT/<path_to_domain>/<path_to_domain>/tasks where the correct file is $CGROUPS_MOUNTPOINT/<path_to_domain>/tasks. I did workaround this problem with a tricky way by truncating the duplicated path. We probably need a more feasible solution. Note that this patch intends a proof of concept to be clear the correct way to go and thus it remains a couple of awkward codes. Of course the codes should be removed if we find the correct way.