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authorGautham R Shenoy <ego@in.ibm.com>2009-04-14 10:25:35 +0530
committerIngo Molnar <mingo@elte.hu>2009-04-14 11:49:19 +0200
commite790fb0ba64bfec158e1219d899cb588275d12ab (patch)
treef4eda89681e027cd617881773ab0559d9fced430 /block
parentf711f6090a81cbd396b63de90f415d33f563af9b (diff)
sched: Nominate a power-efficient ilb in select_nohz_balancer()
The CPU that first goes idle becomes the idle-load-balancer and remains that until either it picks up a task or till all the CPUs of the system goes idle. Optimize this further to allow it to relinquish it's post once all it's siblings in the power-aware sched_domain go idle, thereby allowing the whole package-core to go idle. While relinquising the post, nominate another an idle-load balancer from a semi-idle core/package. Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20090414045535.7645.31641.stgit@sofia.in.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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