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

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Date:	Thu, 21 Jun 2012 09:53:47 +0530
From:	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Prashanth Nageshappa <prashanth@...ux.vnet.ibm.com>,
	mingo@...nel.org, LKML <linux-kernel@...r.kernel.org>,
	roland@...nel.org, 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

* Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com> [2012-06-21 09:10:59]:

> Hmm ..I can see loop_break being incremented here:
> 
>                 /* take a breather every nr_migrate tasks */
>                 if (env->loop > env->loop_break) {
>                         env->loop_break += sched_nr_migrate_break;

One possibility is to reset env->loop here, rather than loop_break, in
which case loop_break can remain constant across "redos" and
"more_balances"


>                         env->flags |= LBF_NEED_BREAK;
>                         goto out;
>                 }

- vatsa

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