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

From: Peter Zijlstra
Date: Fri Oct 19 2012 - 10:38:45 EST

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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