linux-kernel - Re: [PATCH v3 0/3] Enable >0 order folio memory compaction

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Date: Fri, 2 Feb 2024 11:55:35 -0800
From: Luis Chamberlain <mcgrof@...nel.org>
To: Zi Yan <ziy@...dia.com>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	"Huang, Ying" <ying.huang@...el.com>,
	Ryan Roberts <ryan.roberts@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Matthew Wilcox (Oracle)" <willy@...radead.org>,
	David Hildenbrand <david@...hat.com>,
	"Yin, Fengwei" <fengwei.yin@...el.com>, Yu Zhao <yuzhao@...gle.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Baolin Wang <baolin.wang@...ux.alibaba.com>,
	Kemeng Shi <shikemeng@...weicloud.com>,
	Mel Gorman <mgorman@...hsingularity.net>,
	Rohan Puri <rohan.puri15@...il.com>,
	Adam Manzanares <a.manzanares@...sung.com>,
	"Vishal Moola (Oracle)" <vishal.moola@...il.com>
Subject: Re: [PATCH v3 0/3] Enable >0 order folio memory compaction

On Fri, Feb 02, 2024 at 11:15:51AM -0500, Zi Yan wrote:
> From: Zi Yan <ziy@...dia.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