linux-kernel - Re: [PATCH v1] sched: fix nohz idle load balancer issues

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Message-ID: <20110928043921.GC8593@linux.vnet.ibm.com>
Date:	Wed, 28 Sep 2011 10:09:21 +0530
From:	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>
To:	Venki Pallipadi <venki@...gle.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Turner <pjt@...gle.com>, Ingo Molnar <mingo@...e.hu>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] sched: fix nohz idle load balancer issues

* Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com> [2011-09-28 10:04:27]:

> unless we want to go for more sophisticated like a sorted list of
> rq->next_balance in a rb-tree

Given that this list will need to be global (and not per-cpu) and it will need 
to be updated reqularly (even when cpus are busy and as they update their 
rq->next_balance), that will probably not fly!

- vatsa
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