Ben Blum wrote: > This patch series implements simple support for building and loading > subsystems as modules, both within and outside the kernel source tree. > Module unloading is as yet unimplemented - it will require more advanced > reference counting in the mount/unmount code, and I plan to work on this > soon. > I doubt the value of module-loadable subsystems. A cgroup subsystem is usually a kernel resource controller, and normally it needs to add some hooks in some in-kernel structures and functions, which makes it impossible to be a module. In fact, net_cls is the only subsystem that can be a module, and make it a module doesn't seem to have real benefit? > Patch #1 sets up the subsys[] array so its contents can be dynamic as > modules appear and (eventually) disappear. I introduce an rwsem called > subsys_mutex to protect against concurrent loads/unloads/reads, and > modify iterations over the array to handle when subsystems are absent. > > Patch #2 implements an interface for modules to load subsystems, called > cgroup_load_subsys, similar to cgroup_init_subsys, and adds a module > pointer in struct cgroup_subsys. > > Patch #3 modifies the net_cls subsystem, which already had some module > declarations, to be configurable as a module, which also serves as a > simple proof-of-concept. > > -- bblum > _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
