linux-kernel - Re: [-mm] Add an owner to the mm

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Message-ID: <47ECBDAF.9070007@gmail.com>
Date:	Fri, 28 Mar 2008 10:43:11 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Balbir Singh <balbir@...ux.vnet.ibm.com>
CC:	Paul Menage <menage@...gle.com>,
	Pavel Emelianov <xemul@...nvz.org>,
	Hugh Dickins <hugh@...itas.com>,
	Sudhir Kumar <skumar@...ux.vnet.ibm.com>,
	YAMAMOTO Takashi <yamamoto@...inux.co.jp>, lizf@...fujitsu.com,
	linux-kernel@...r.kernel.org, taka@...inux.co.jp,
	linux-mm@...ck.org, David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [-mm] Add an owner to the mm_struct (v2)

On 03/28/2008 10:41 AM, Jiri Slaby wrote:
>> linux-2.6.25-rc5/include/linux/mm_types.h~memory-controller-add-mm-owner    
>> 2008-03-28 09:30:47.000000000 +0530
>> +++ linux-2.6.25-rc5-balbir/include/linux/mm_types.h    2008-03-28 
>> 12:26:59.000000000 +0530
>> @@ -227,8 +227,10 @@ struct mm_struct {
>>      /* aio bits */
>>      rwlock_t        ioctx_list_lock;
>>      struct kioctx        *ioctx_list;
>> -#ifdef CONFIG_CGROUP_MEM_RES_CTLR
>> -    struct mem_cgroup *mem_cgroup;
>> +#ifdef CONFIG_MM_OWNER
>> +    spinlock_t owner_lock;
>> +    struct task_struct *owner;    /* The thread group leader that */
> 
> Doesn't make sense to switch them (spinlock is unsigned int on x86, 
> what's sizeof between and after?)?

Hmm, doesn't matter, there is another pointer after it, ignore me.
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