Re: [PATCH] mm: /prom/pid/clear_refs: avoid split_huge_page()

[Andrew Morton]

On Wed, 21 May 2014 22:04:22 +0300 "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx> wrote:

> Currently we split all THP pages on any clear_refs request. It's not
> necessary. We can handle this on PMD level.
> 
> One side effect is that soft dirty will potentially see more dirty
> memory, since we will mark whole THP page dirty at once.

This clashes pretty badly with
http://ozlabs.org/~akpm/mmots/broken-out/clear_refs-redefine-callback-functions-for-page-table-walker.patch

> Sanity checked with CRIU test suite. More testing is required.

Will you be doing that testing or was this a request for Cyrill & co to
help?

Perhaps this is post-3.15 material.
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