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Date: Wed, 14 Jul 2021 14:48:30 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Joao Martins <joao.m.martins@oracle.com>
Cc: linux-mm@kvack.org, Dan Williams <dan.j.williams@intel.com>, Vishal
 Verma <vishal.l.verma@intel.com>, Dave Jiang <dave.jiang@intel.com>, Naoya
 Horiguchi <naoya.horiguchi@nec.com>, Matthew Wilcox <willy@infradead.org>,
 Jason Gunthorpe <jgg@ziepe.ca>, John Hubbard <jhubbard@nvidia.com>, Jane
 Chu <jane.chu@oracle.com>, Muchun Song <songmuchun@bytedance.com>, Mike
 Kravetz <mike.kravetz@oracle.com>, Jonathan Corbet <corbet@lwn.net>,
 nvdimm@lists.linux.dev, linux-doc@vger.kernel.org
Subject: Re: [PATCH v3 00/14] mm, sparse-vmemmap: Introduce compound
 pagemaps
Message-Id: <20210714144830.29f9584878b04903079ef7eb@linux-foundation.org>
In-Reply-To: <20210714193542.21857-1-joao.m.martins@oracle.com>
References: <20210714193542.21857-1-joao.m.martins@oracle.com>
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On Wed, 14 Jul 2021 20:35:28 +0100 Joao Martins <joao.m.martins@oracle.com> wrote:

> This series, attempts at minimizing 'struct page' overhead by
> pursuing a similar approach as Muchun Song series "Free some vmemmap
> pages of hugetlb page"[0] but applied to devmap/ZONE_DEVICE which is now
> in mmotm. 
> 
> [0] https://lore.kernel.org/linux-mm/20210308102807.59745-1-songmuchun@bytedance.com/

[0] is now in mainline.

This patch series looks like it'll clash significantly with the folio
work and it is pretty thinly reviewed, so I think I'll take a pass for
now.  Matthew, thoughts?