On Thu, Jul 31, 2008 at 01:32:13PM -0500, Serge E. Hallyn wrote: > Introduce sys_hijack (for i386 and s390 only so far). An open > fd for a cgroup 'tasks' file is specified. The main purpose > is to allow entering an empty cgroup without having to keep a > task alive in the target cgroup.
What is the problem if no task is alive in the target? > The effect is a sort of namespace enter. The following program > uses sys_hijack to 'enter' all namespaces of the specified > cgroup. I currently fail to see what the differences to a normal cgroup attach is. > For instance in one terminal, do > > mount -t cgroup -ons cgroup /cgroup > hostname > qemu > ns_exec -u /bin/sh > hostname serge > echo $$ > 2996 > cat /proc/$$/cgroup > ns:/node_2996 > > In another terminal then do > > hostname > qemu > cat /proc/$$/cgroup > ns:/ > hijack /cgroup/node_2996/tasks Why can't this be done by a echo $$ >> /cgroup/node_2996/attach? > hostname > serge > cat /proc/$$/cgroup > ns:/node_2996 Bastian -- Star Trek Lives! _______________________________________________ Containers mailing list [EMAIL PROTECTED] https://lists.linux-foundation.org/mailman/listinfo/containers _______________________________________________ Devel mailing list Devel@openvz.org https://openvz.org/mailman/listinfo/devel
