linux-kernel - Re: [PATCH 2/3] sched: don't call get

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Message-ID: <CAKohpo=oAa=mdkZk9yq4W7v-hQpCAM00rTJTWOn-eCBreEqTdA@mail.gmail.com>
Date:	Tue, 18 Jun 2013 15:45:15 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	mingo@...hat.com, linaro-kernel@...ts.linaro.org,
	patches@...aro.org, linux-kernel@...r.kernel.org,
	robin.randhawa@....com, Steve.Bannister@....com,
	Liviu.Dudau@....com, charles.garcia-tobin@....com,
	arvind.chauhan@....com
Subject: Re: [PATCH 2/3] sched: don't call get_group() for covered cpus

On 18 June 2013 15:33, Peter Zijlstra <peterz@...radead.org> wrote:
> On Tue, Jun 11, 2013 at 04:32:44PM +0530, Viresh Kumar wrote:
>> In build_sched_groups() we don't need to call get_group() for cpus which are
>> already covered in previous iterations. So, call get_group() after checking if
>> cpu is covered or not.
>>
>
> Aside from not needing it; doing it would mark the group used and
> eventually leak it since we wouldn't connect it and not find it again to
> free it, right?
>
> So effectively this fixes a memory leak?

Exactly. To be precise: In cases where sg->cpumask contained more
than one cpu (For any topology level), this patch helps freeing sg's
memory for all cpus leaving the group leader.

May I update the logs again?
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