sched: rt-group: deal with PI

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Steven mentioned the fun case where a lock holding task will be throttled.

Simple fix: allow groups that have boosted tasks to run anyway.

If a runnable task in a throttled group gets boosted the dequeue/enqueue
done by rt_mutex_setprio() is enough to unthrottle the group.

This is ofcourse not quite correct. Two possible ways forward are:
  - second prio array for boosted tasks
  - boost to a prio ceiling (this would also work for deadline scheduling)

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Peter Zijlstra 2008-02-13 15:45:39 +01:00 • committed by Ingo Molnar

parent 4cf5d77a6e

commit 23b0fdfc92

2 changed files with 41 additions and 5 deletions

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kernel/sched.c

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kernel/sched_rt.c

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