Subject: Re: [PATCH v7 05/24] mm: devmap: refactor 1-based refcounting for ZONE_DEVICE pages

From: Christoph Hellwig <[email-masked]>
Date: Thu, 21 Nov 2019 09:05:55 +0100

So while this looks correct and I still really don't see the major
benefit of the new code organization, especially as it bloats all
put_page callers.

I'd love to see code size change stats for an allyesconfig on this
commit.