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Date: Fri, 27 Nov 2009 12:48:16 +0300
From: Pavel Emelyanov <xemul@parallels.com>
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Subject: Re: memcg: slab control
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To: Ying Han <yinghan@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>, David Rientjes <rientjes@google.com>, Balbir Singh <balbir@linux.vnet.ibm.com>, Pavel Emelyanov <xemul@openvz.org>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Suleiman Souhlal <suleiman@google.com>, linux-mm@kvack.org
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Ying Han wrote:
> I kind of like the idea to have a kernel memory controller instead of
> kernel slab controller.
> If we only count kernel slabs, do we need another mechanism to count
> kernel allocations
> directly from get_free_pages() ?

We do. Look at what get_free_pages we mark with GFP_UBC in beancounters
and see, that if we don't count them this creates way to DoS the kernel.

> --Ying
>>
>> Thanks.
>>
>>
> 
> 

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