linux-kernel - Re: [PATCH 1/5] x86: Get pg_data

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Message-ID: <50AC6F60.7000201@jp.fujitsu.com>
Date:	Wed, 21 Nov 2012 15:06:24 +0900
From:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
To:	Tang Chen <tangchen@...fujitsu.com>
CC:	<wency@...fujitsu.com>, <linfeng@...fujitsu.com>,
	<rob@...dley.net>, <akpm@...ux-foundation.org>,
	<laijs@...fujitsu.com>, <jiang.liu@...wei.com>,
	<kosaki.motohiro@...fujitsu.com>, <minchan.kim@...il.com>,
	<mgorman@...e.de>, <rientjes@...gle.com>, <yinghai@...nel.org>,
	<rusty@...tcorp.com.au>, <linux-kernel@...r.kernel.org>,
	<linux-mm@...ck.org>, <linux-doc@...r.kernel.org>
Subject: Re: [PATCH 1/5] x86: Get pg_data_t's memory from other node

Hi Tang,

2012/11/21 14:58, Tang Chen wrote:
> Hi Ishimatsu-san,
> 
> Thanks for the comments.
> 
> And I also found the some algorithm problems in patch2 ~ patch3.
> I am working on it, and a v2 patchset is coming soon. :)

O.K.
I'm waiting nwe patch-set.

Thanks,
Yasuaki Ishimatsu

> 
> Thanks.
> 
> On 11/21/2012 01:46 PM, Yasuaki Ishimatsu wrote:
>> Hi Tang,
>>
>> 2012/11/19 23:27, Tang Chen wrote:
>>> From: Yasuaki Ishimatsu<isimatu.yasuaki@...fujitsu.com>
>>>
>>> If system can create movable node which all memory of the
>>> node is allocated as ZONE_MOVABLE, setup_node_data() cannot
>>> allocate memory for the node's pg_data_t.
>>> So when memblock_alloc_nid() fails, setup_node_data() retries
>>> memblock_alloc().
>>>
>>> Signed-off-by: Yasuaki Ishimatsu<isimatu.yasuaki@...fujitsu.com>
>>> Signed-off-by: Lai Jiangshan<laijs@...fujitsu.com>
>>> Signed-off-by: Tang Chen<tangchen@...fujitsu.com>
>>> Reviewed-by: Wen Congyang<wency@...fujitsu.com>
>>> Tested-by: Lin Feng<linfeng@...fujitsu.com>
>>> ---
>>>     arch/x86/mm/numa.c |    9 +++++++--
>>>     1 files changed, 7 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
>>> index 2d125be..ae2e76e 100644
>>> --- a/arch/x86/mm/numa.c
>>> +++ b/arch/x86/mm/numa.c
>>> @@ -224,9 +224,14 @@ static void __init setup_node_data(int nid, u64 start, u64 end)
>>>     	} else {
>>>     		nd_pa = memblock_alloc_nid(nd_size, SMP_CACHE_BYTES, nid);
>>>     		if (!nd_pa) {
>>> -			pr_err("Cannot find %zu bytes in node %d\n",
>>
>>> +			printk(KERN_WARNING "Cannot find %zu bytes in node %d\n",
>>>     			       nd_size, nid)
>>
>> Please change to use pr_warn().
>>
>> Thanks,
>> Yasuaki Ishimatsu
>>
>>> -			return;
>>> +			nd_pa = memblock_alloc(nd_size, SMP_CACHE_BYTES);
>>> +			if (!nd_pa) {
>>> +				pr_err("Cannot find %zu bytes in other node\n",
>>> +				       nd_size);
>>> +				return;
>>> +			}
>>>     		}
>>>     		nd = __va(nd_pa);
>>>     	}
>>>
>>
>>
>>
> 


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