Re: [RFC PATCH 08/12] mm: use mirrorable to switch allocate mirrored memory

[Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

On 2015/06/09 19:09, Xishi Qiu wrote:
> On 2015/6/9 15:06, Kamezawa Hiroyuki wrote:
>
>> On 2015/06/04 22:02, Xishi Qiu wrote:
>>> Add a new interface in path /proc/sys/vm/mirrorable. When set to 1, it means
>>> we should allocate mirrored memory for both user and kernel processes.
>>>
>>> Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
>>
>> I can't see why do we need this switch. If this is set, all GFP_HIGHUSER will use
>> mirrored memory ?
>>
>> Or will you add special MMAP/madvise flag to use mirrored memory ?
>>
>
> Hi Kame,
>
> Yes,
>
> MMAP/madvise
> 	-> add VM_MIRROR
> 		-> add GFP_MIRROR
> 			-> use MIGRATE_MIRROR list to alloc mirrored pages
>
> So user can use mirrored memory. What do you think?
>

I see. please explain it (your final plan) in patch description or in cover page of patches.

Thanks,
-Kame


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