Re: [PATCH 1/2] sched/deadline: add per rq tracking of admitted bandwidth

[Juri Lelli]

On 11/02/16 09:25, Steven Rostedt wrote:
> On Thu, 11 Feb 2016 14:05:45 +0100
> luca abeni <luca.abeni@xxxxxxxx> wrote:
> 
>   
> > Well, I never used the rq utilization to re-build the root_domain
> > utilization (and I never played with root domains too much... :)...
> > So, I do not really know. Maybe the code should do:
> > 	raw_spin_lock(&rq->lock);
> > 	raw_spin_lock(&cpu_rq(cpu)->lock);
> 
> Of course you want to use double_rq_lock() here instead.
> 

Right. Is something like this completely out of question/broken?

I slighly tested it with Steve's test and I don't see the warning
anymore (sched_debug looks good as well); but my confidence is still
pretty low. :(

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