Re: [tip:numa/core] sched/numa/mm: Improve migration

[Peter Zijlstra]

On Fri, 2012-10-19 at 09:51 -0400, Johannes Weiner wrote:
> Right now, unlike the traditional migration path, this breaks COW for
> every migration, but maybe you don't care about shared pages in the
> first place.  And fixing that should be nothing more than grabbing the
> anon_vma lock and using rmap to switch more than one pmd over, right?
> 

This patch was very much about getting _something_ rather than caring
(too much) about all the weird corner cases.

And yes, your suggestion sounds about right.
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