linux-kernel - Re: [RFC PATCH v3 5/6] sched: pack the idle load balance

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Message-ID: <1364374174.5053.59.camel@laptop>
Date:	Wed, 27 Mar 2013 09:49:34 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Alex Shi <alex.shi@...el.com>
Cc:	Vincent Guittot <vincent.guittot@...aro.org>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linaro-kernel@...ts.linaro.org, mingo@...nel.org,
	linux@....linux.org.uk, pjt@...gle.com, santosh.shilimkar@...com,
	morten.rasmussen@....com, chander.kashyap@...aro.org,
	cmetcalf@...era.com, tony.luck@...el.com,
	preeti@...ux.vnet.ibm.com, paulmck@...ux.vnet.ibm.com,
	tglx@...utronix.de, len.brown@...el.com, arjan@...ux.intel.com,
	amit.kucheria@...aro.org, corbet@....net,
	Venkatesh Pallipadi <venki@...gle.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: Re: [RFC PATCH v3 5/6] sched: pack the idle load balance

On Wed, 2013-03-27 at 12:56 +0800, Alex Shi wrote:

> Just one buddy to pack tasks for whole level cpus definitely has
> scalability problem.

Right, but note we already have this scalability problem in the form of
the ILB. Some people were working on sorting that but then someone
changed jobs and I think it fell in some deep and dark crack.

Venki, Suresh?

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