Messages in this thread | | | Date | Fri, 4 Aug 2006 12:26:15 +0530 | From | Srivatsa Vaddagiri <> | Subject | Re: [RFC, PATCH 0/5] Going forward with Resource Management - A cpu controller |
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On Thu, Aug 03, 2006 at 10:36:50PM -0700, Andrew Morton wrote: > ug, I didn't know this. Had I been there (sorry) I'd have disagreed with > this whole strategy. > > I thought the most recently posted CKRM core was a fine piece of code. It > provides the machinery for grouping tasks together and the machinery for > establishing and viewing those groupings via configfs, and other such > common functionality. My 20-minute impression was that this code was an > easy merge and it was just awaiting some useful controllers to come along. > > And now we've dumped the good infrastructure and instead we've contentrated > on the controller, wired up via some imaginative ab^H^Hreuse of the cpuset > layer.
Andrew, CPUset was used in this patch series primarily because it represent a task-grouping mechanism already in the kernel and because people at the BoF wanted to start with something simple. The idea of using cpusets here was not to push this as a final solution, but use it as a means to discuss the effects of task-grouping on CPU scheduler.
We had be more than happy to work with the ckrm core which was posted last. In fact I had sent out the same cpu controller against ckrm core itself last time around to Nick/Ingo.
> Right. We won't be controlling memory, numtasks, disk, network etc > controllers via cpusets, will we?
Agreed. Using CPUset interface makes sense mainly for cpu and memory.
> Correct me if I'm wrong, but a cpuset isn't the appropriate machinery to be > using to group tasks. > > And if this whole resource-control effort is to end up being successful, it > should have as core infrastructure a flexible, appropriate and uniform way > of grouping tasks together and of getting data into and out of those > aggregates. We already have that, don't we?
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