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Date: Fri, 2 Feb 2024 11:55:35 -0800
From: Luis Chamberlain <mcgrof@kernel.org>
To: Zi Yan <ziy@nvidia.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	"Huang, Ying" <ying.huang@intel.com>,
	Ryan Roberts <ryan.roberts@arm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Matthew Wilcox (Oracle)" <willy@infradead.org>,
	David Hildenbrand <david@redhat.com>,
	"Yin, Fengwei" <fengwei.yin@intel.com>, Yu Zhao <yuzhao@google.com>,
	Vlastimil Babka <vbabka@suse.cz>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Baolin Wang <baolin.wang@linux.alibaba.com>,
	Kemeng Shi <shikemeng@huaweicloud.com>,
	Mel Gorman <mgorman@techsingularity.net>,
	Rohan Puri <rohan.puri15@gmail.com>,
	Adam Manzanares <a.manzanares@samsung.com>,
	"Vishal Moola (Oracle)" <vishal.moola@gmail.com>
Subject: Re: [PATCH v3 0/3] Enable >0 order folio memory compaction
Message-ID: <Zb1Ity8GND1Sm2Y7@bombadil.infradead.org>
References: <20240202161554.565023-1-zi.yan@sent.com>
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Sender: Luis Chamberlain <mcgrof@infradead.org>

On Fri, Feb 02, 2024 at 11:15:51AM -0500, Zi Yan wrote:
> From: Zi Yan <ziy@nvidia.com>
> 
> Hi all,
> 
> This patchset enables >0 order folio memory compaction, which is one of
> the prerequisitions for large folio support[1].
> 
> [1] https://lore.kernel.org/linux-mm/20230912162815.440749-1-zi.yan@sent.com/

This URL started being referenced to your patch series instead of the
rationale as to why this is important, and that is that compaction today
skips pages with order > 0 and that this is already a problem for the
page cache. The correct URL which you had in your *first* cover letter
is:

https://lore.kernel.org/linux-mm/f8d47176-03a8-99bf-a813-b5942830fd73@arm.com/

  Luis