linux-kernel - Re: [PATCHv4 2/2] powerpc: implement arch_scale_smt

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Message-ID: <1266942626.11845.527.camel@laptop>
Date:	Tue, 23 Feb 2010 17:30:26 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Michael Neuling <mikey@...ling.org>
Cc:	Joel Schopp <jschopp@...tin.ibm.com>, Ingo Molnar <mingo@...e.hu>,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	ego@...ibm.com
Subject: Re: [PATCHv4 2/2] powerpc: implement arch_scale_smt_power for
 Power7

On Tue, 2010-02-23 at 17:24 +0100, Peter Zijlstra wrote:
> 
>         busiest_cpu = group_first_cpu(sds->busiest);
>         if (cpu_rq(this_cpu)->nr_running || this_cpu > busiest_cpu)
>                 return 0; 

Hmm, we could change the bit in find_busiest_group() to:

  if (idle == CPU_IDLE && check_asym_packing())

and skip the nr_running test..

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