linux-kernel - Re: [PATCH v5] x86,cpu-hotplug: assign same CPU number to readded CPU

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Date:	Mon, 15 Sep 2014 10:44:23 -0600
From:	Toshi Kani <toshi.kani@...com>
To:	Mike Galbraith <umgwanakikbuti@...il.com>
Cc:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, bp@...en8.de,
	gong.chen@...ux.intel.com, tony.luck@...el.com, x86@...nel.org,
	imammedo@...hat.com, huawei.libin@...wei.com,
	paul.gortmaker@...driver.com, linux-kernel@...r.kernel.org,
	srivatsa.bhat@...ux.vnet.ibm.com, peterz@...radead.org,
	Wanpeng Li <wanpeng.li@...ux.intel.com>,
	Linn Crosetto <linn@...com>
Subject: Re: [PATCH v5] x86,cpu-hotplug: assign same CPU number to readded
 CPU

On Mon, 2014-09-15 at 06:25 +0200, Mike Galbraith wrote:
> On Thu, 2014-09-11 at 16:21 +0900, Yasuaki Ishimatsu wrote: 
> > There is no response for two months since posting v4.
> > What can I do for pushing the patch to upstream?
> 
> Looks to me like we have two patches floating about for more or less the
> same problem, this one, and...
> 
> https://lkml.org/lkml/2014/7/29/159
> 
> ..this one, which you reviewed, and HP both reviewed and tested.
> 
> We seem to kinda stuck with Boris having said don't diddle the
> cpu_llc_shared_map, but HP/Intel saying that this map diddling fixes
> their explosions.  If your alternative is preferred over diddling
> cpu_llc_shared_map, perhaps HP/Intel can test/confirm that their
> explosions stay gone? 

Well, Boris mentioned later in his email:
https://lkml.org/lkml/2014/7/22/201

And I agree with his assessment that both patches make sense.  

Thanks,
-Toshi


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