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Date: Tue, 10 Jan 2012 22:21:29 +0530
From: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
To: Youquan Song <youquan.song@intel.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>, linux-kernel@vger.kernel.org,
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        arjan@linux.intel.com, len.brown@intel.com, anhua.xu@intel.com,
        chaohong.guo@intel.com, Youquan Song <youquan.song@linux.intel.com>
Subject: Re: [PATCH] x86,sched: Fix sched_smt_power_savings totally broken
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* Youquan Song <youquan.song@intel.com> [2012-01-10 11:54:26]:

> 
> > Youquan, As far as I know both the
> > sched_smt_power_savings/sched_mc_power_savings are broken for atleast an
> > year.
> > 
> > Have you checked the state of 'sched_mc_power_savings' to see if it is
> > working or gets addressed with your proposed patches?
> Thanks Suresh!
> 
> We have verified that sched_mc_power_savings works well in mainline and
> -tip tree, only sched_smt_power_savings broken.

Hi Suresh,

My testing also shows that sched_mc works find and only sched_smt
suffers from the group capacity problem at the core level.

--Vaidy