Messages in this thread | | | Date | Tue, 7 Nov 2006 11:22:49 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: + sched-use-tasklet-to-call-balancing.patch added to -mm tree |
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On Tue, 7 Nov 2006, Siddha, Suresh B wrote:
> tasklet_schedule doesn't schedule if there is already one scheduled.
Correct. The effect of this is to only allow load balancing on one cpu at a time. Subsequent attempts to schedule load balancing on other cpus are ignored until the cpu that is load balancing has finished. Then the others (hopefully) get a turn.
A pretty interesting unintended effect. It certainly solves the concurrent load balancing scalability issues and would avoid the need to stagger load balancing. Wonder how fair it would be?
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