linux-kernel - Re: [Patch] mm: make CONFIG_NUMA depend on CONFIG

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Date:	Tue, 19 Jul 2011 14:07:03 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Randy Dunlap <rdunlap@...otime.net>
CC:	Andi Kleen <andi@...stfloor.org>,
	Pekka Enberg <penberg@...nel.org>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org
Subject: Re: [Patch] mm: make CONFIG_NUMA depend on CONFIG_SYSFS

于 2011年07月19日 01:14, Randy Dunlap 写道:
> On Mon, 18 Jul 2011 19:09:50 +0200 Andi Kleen wrote:
>
>> On Mon, Jul 18, 2011 at 03:14:18PM +0300, Pekka Enberg wrote:
>>> On Mon, Jul 18, 2011 at 2:18 PM, Amerigo Wang<amwang@...hat.com>  wrote:
>>>> On ppc, we got this build error with randconfig:
>>>>
>>>> drivers/built-in.o:(.toc1+0xf90): undefined reference to `vmstat_text': 1 errors in 1 logs
>>>>
>>>> This is due to that it enabled CONFIG_NUMA but not CONFIG_SYSFS.
>>>>
>>>> And the user-space tool numactl depends on sysfs files too.
>>>> So, I think it is very reasonable to make CONFIG_NUMA depend on CONFIG_SYSFS.
>>>
>>> Is it? CONFIG_NUMA is useful even without userspace numactl tool, no?
>>
>> Yes it is. No direct dependency.
>>
>> I would rather fix it in ppc.
>
> This isn't a ppc-only error.  It happens when CONFIG_PROC_FS is not enabled
> (or is it CONFIG_SYSFS?).
>
> I reported it for linux-next of 20110526:
>
> when CONFIG_PROC_FS is not enabled:
>
> drivers/built-in.o: In function `node_read_vmstat':
> node.c:(.text+0x56ffa): undefined reference to `vmstat_text'
>

Right, I believe x86 has the same problem.
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