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authorPaul Turner <pjt@google.com>2011-07-21 09:43:29 -0700
committerIngo Molnar <mingo@elte.hu>2011-08-14 12:03:22 +0200
commita790de99599a29ad3f18667530cf4b9f4b7e3234 (patch)
tree58a06419b7a6a90dac6028263a54b3ed3e68e40b /kernel/sysctl.c
parentab84d31e15502fb626169ba2663381e34bf965b2 (diff)
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sched: Validate CFS quota hierarchies
Add constraints validation for CFS bandwidth hierarchies. Validate that: max(child bandwidth) <= parent_bandwidth In a quota limited hierarchy, an unconstrained entity (e.g. bandwidth==RUNTIME_INF) inherits the bandwidth of its parent. This constraint is chosen over sum(child_bandwidth) as notion of over-commit is valuable within SCHED_OTHER. Some basic code from the RT case is re-factored for reuse. Signed-off-by: Paul Turner <pjt@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20110721184757.083774572@google.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
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