Re: [RFC 0/3] Pin page control subsystem

[Christoph Lameter]

On Tue, 13 Aug 2013, Minchan Kim wrote:

> VM sometime want to migrate and/or reclaim pages for CMA, memory-hotplug,
> THP and so on but at the moment, it could handle only userspace pages
> so if above example subsystem have pinned a some page in a range VM want
> to migrate, migration is failed so above exmaple couldn't work well.

Dont we have the mmu_notifiers that could help in that case? You could get
a callback which could prepare the pages for migration?
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