linux-kernel - Re: [PATCH V16 11/11] x86,cgroup/intel_rdt : Add a cgroup interface to manage Intel cache allocation

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Message-ID: <568AE86B.8000106@nod.at>
Date:	Mon, 4 Jan 2016 22:47:23 +0100
From:	Richard Weinberger <richard@....at>
To:	"Yu, Fenghua" <fenghua.yu@...el.com>,
	Marcelo Tosatti <mtosatti@...hat.com>
Cc:	Luiz Capitulino <lcapitulino@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Ingo Molnar <mingo@...e.hu>,
	"Luck, Tony" <tony.luck@...el.com>,
	"Shankar, Ravi V" <ravi.v.shankar@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Tejun Heo <tj@...nel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	x86 <x86@...nel.org>,
	Vikas Shivappa <vikas.shivappa@...ux.intel.com>
Subject: Re: [PATCH V16 11/11] x86,cgroup/intel_rdt : Add a cgroup interface
 to manage Intel cache allocation

Am 04.01.2016 um 22:44 schrieb Yu, Fenghua:
>> From: Richard Weinberger [mailto:richard.weinberger@...il.com]
>> Sent: Saturday, January 02, 2016 2:54 PM
>> On Mon, Dec 21, 2015 at 6:05 PM, Marcelo Tosatti <mtosatti@...hat.com>
>> wrote:
>>> OK cool hopefully that makes it clear to Fenghua Yu what must be
>>> changed in the patchset.
>>>
>>>>  - http://lkml.iu.edu/hypermail/linux/kernel/1511.0/02375.html
>>
>> ...beating a dead horse but this patch is in -next and breaks the ARCH=um
>> build when enabled.
>>
>>   UPD     include/generated/compile.h
>>   CC      init/version.o
>>   LD      init/built-in.o
>> kernel/built-in.o:(.rodata+0x2920): undefined reference to
>> `intel_rdt_cgrp_subsys'
>> collect2: error: ld returned 1 exit status
>> make: *** [vmlinux] Error 1
> 
> Do you set CONFIG_INTEL_RDT=y?

Yes. My build bot does allyesconfig builds. :)
IIUC the driver does not make sense for UML, does it?

Thanks,
//richard
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