linux-kernel - Re: [PATCH 13/15] mm, devmap: introduce CONFIG_DEVMAP_MANAGED

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Date:   Fri, 10 Nov 2017 10:06:58 +0100
From:   Christoph Hellwig <hch@....de>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     linux-nvdimm@...ts.01.org, Michal Hocko <mhocko@...e.com>,
        linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-mm@...ck.org,
        Jérôme Glisse <jglisse@...hat.com>,
        linux-fsdevel@...r.kernel.org, akpm@...ux-foundation.org,
        hch@....de
Subject: Re: [PATCH 13/15] mm, devmap: introduce CONFIG_DEVMAP_MANAGED_PAGES

On Tue, Oct 31, 2017 at 04:22:46PM -0700, Dan Williams wrote:
> Combine the now three use cases of page-idle callbacks for ZONE_DEVICE
> memory into a common selectable symbol.

Very sparse changelog.  I understand the Kconfig bit, but it also seems to
introduce new static key functionality that isn't explained at all.