On 2/12/07, Sam Vilain <sam at vilain.net> wrote: > Ask yourself this - what do you need the container structure for so > badly, that virtualising the individual resources does not provide for? Primarily, that otherwise every module that wants to affect/monitor behaviour of a group of associated processes has to implement its own process grouping abstraction. As an example, the CPU accounting patch that in included in my patch set as an illustration of a simple resource monitoring module is just 250 lines, almost entirely in one file; if it also had to handle associating tasks together into groups and presenting a filesystem interface to the user it would be far larger and would have a much bigger footprint on the kernel. >From the point of view of the virtual server containers, the advantage is that you're integrated with a standard filesystem interface for determining group membership. It does become simpler to combine virtual servers and resource controllers, although I grant you that you could juggle that from userspace without the additional kernel support. Paul
