linux-kernel - Re: [RFC PATCH v3 0/5] Tunable sched_mc_power

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Message-Id: <1226343016.7685.444.camel@twins>
Date:	Mon, 10 Nov 2008 19:50:16 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Suresh B Siddha <suresh.b.siddha@...el.com>,
	Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>,
	Ingo Molnar <mingo@...e.hu>,
	Dipankar Sarma <dipankar@...ibm.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Vatsa <vatsa@...ux.vnet.ibm.com>,
	Gautham R Shenoy <ego@...ibm.com>,
	Andi Kleen <andi@...stfloor.org>,
	David Collier-Brown <davecb@....com>,
	Tim Connors <tconnors@...ro.swin.edu.au>,
	Max Krasnyansky <maxk@...lcomm.com>
Subject: Re: [RFC PATCH v3 0/5] Tunable sched_mc_power_savings=n


a quick response, I'll read them more carefully tomorrow:

 - why are the preferred cpu things pointers? afaict using just the cpu
number is both smaller and clearer to the reader.

 - in patch 5/5 you do:

+               spin_unlock(&this_rq->lock);
+               double_rq_lock(this_rq, busiest);

we call that double_lock_balance()

 - comments go like:

 /*
  * this is a multi-
  * line comment
  */



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