On 7/17/07, Paul Jackson <[EMAIL PROTECTED]> wrote:
At least for cpusets (the mother of all containers), notify on release is part of the user visible API of cpusets. The kernel does not remove cpusets; it runs a user program, /sbin/cpuset_release_agent. That program might choose to rmdir the cpuset directory, and/or do other actions, like notify a batch scheduler that one of its cpusets was released.
Right, that's what the release agent patch for process containers does - there's a file in the hierarchy root called "release_agent" that contains the path to the program to run if a notify_on_release container goes idle. When you mount the "cpuset" filesystem, it automatically populates that file with "/sbin/cpuset_release_agent". A workqueue task is used to actually do the notifications so that references can be dropped without having to potentially run a userspace helper. Paul - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
