linux-kernel - Re: [PATCH v3] sched: balance_cpu to consider other cpus in its group as target of (pinned) task

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Message-ID: <1340214048.21745.124.camel@twins>
Date:	Wed, 20 Jun 2012 19:40:48 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Prashanth Nageshappa <prashanth@...ux.vnet.ibm.com>
Cc:	mingo@...nel.org, LKML <linux-kernel@...r.kernel.org>,
	roland@...nel.org, Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	efault@....de, Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH v3] sched: balance_cpu to consider other cpus in its
 group as target of (pinned) task

On Tue, 2012-06-19 at 17:43 +0530, Prashanth Nageshappa wrote:
> +               new_dst_cpu = cpumask_first_and(env->dst_grpmask,
> +                                               tsk_cpus_allowed(p));


> +               if ((env.flags & LBF_SOME_PINNED) && env.imbalance > 0 &&
> +                               lb_iterations++ < max_lb_iterations) { 

Hmm, too bad dst_grpmask isn't an actual mask, otherwise we could simply
clear the cpu we just had, just like the ALL_PINNED does with cpus.
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