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SubjectRe: [PATCH V2 1/2] mm: hotplug: implement non-movable version of get_user_pages() called get_user_pages_non_movable()
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Benjamin LaHaise <bcrl@kvack.org> writes:

> On Mon, May 13, 2013 at 10:19:02AM +0100, Mel Gorman wrote:
>> On Mon, May 13, 2013 at 05:11:43PM +0800, Tang Chen wrote:
> ...
>> > If so, I'm wondering where should we put this callback pointers ?
>> > In struct page ?
>> >
>>
>> No, I would expect the callbacks to be part the address space operations
>> which can be found via page->mapping.
>
> If someone adds those callbacks and provides a means for testing them,
> it would be pretty trivial to change the aio code to migrate its pinned
> pages on demand.

How do you propose to move the ring pages?

Cheers,
Jeff


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