Messages in this thread |  | | | Date | Mon, 24 Nov 2008 09:24:05 -0600 | | From | "Chris Friesen" <> | | Subject | Re: [PATCH] sched: Don't allow priority switch to realtime when the task doesn't belong to init_task_group and when CONFIG_RT_GROUP_SCHED isn't set |
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Peter Zijlstra wrote: > On Mon, 2008-11-24 at 14:16 +0530, Dhaval Giani wrote: > > >>Which would mean the init_task_group becase it contains those tasks which are >>not grouped. > > > Only because of implementation details (we implement the !group case by > having them all part of a single group), conceptually they don't belong > to any group, hence talking about moving it to some group is just wrong.
> Furthermore your statement shows another misconception, a group of > ungrouped tasks doesn't make sense.
Arguably there is such a group, which is "the set of all RT tasks".
Whether or not they should map to the top-level cgroup is a different question. Maybe in the !group case there should be a second top-level "rt" cgroup? We could even make the RT sched tuning knobs available there.
Chris
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