Re: [PATCH v2 2/3] sched: factor out code to should_we_balance()

From: Preeti U Murthy
Date: Mon Aug 05 2013 - 00:25:07 EST

On 08/02/2013 04:02 PM, Peter Zijlstra wrote:
> On Fri, Aug 02, 2013 at 02:56:14PM +0530, Preeti U Murthy wrote:
>>>> You need to iterate over all the groups of the sched domain env->sd and
>>>> not just the first group of env->sd like you are doing above. This is to
>>> I don't think so.
>>> IIRC, env->sd->groups always means local group,
>>> so we don't need to find our group by iterating over all the groups.
>> Take a look at update_sd_lb_stats(). That should clarify this. There is
>> an exclusive
>> local_group check there.
>> sd->groups points to the first group in the list of groups under this sd.
> Take a look at: 88b8dac0a
Ah ok! Thanks for this pointer.

Apologies for having overlooked the fact that the sd->groups always
points to the group to which the balance_cpu belongs. And subsequent
dst_cpus for retries of load balancing also belong to the same group as
the balance_cpu.

This patch thus looks fine to me.

Preeti U Murthy

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