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Date: Wed, 3 Apr 2024 10:33:22 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: Peter Xu <peterx@...hat.com>, Nathan Chancellor <nathan@...nel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Yang Shi <shy828301@...il.com>,
	"Kirill A . Shutemov" <kirill@...temov.name>,
	Mike Kravetz <mike.kravetz@...cle.com>,
	John Hubbard <jhubbard@...dia.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Andrew Jones <andrew.jones@...ux.dev>,
	Muchun Song <muchun.song@...ux.dev>,
	"linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>,
	Lorenzo Stoakes <lstoakes@...il.com>,
	Matthew Wilcox <willy@...radead.org>,
	Rik van Riel <riel@...riel.com>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	David Hildenbrand <david@...hat.com>,
	"Aneesh Kumar K . V" <aneesh.kumar@...nel.org>,
	Vlastimil Babka <vbabka@...e.cz>,
	James Houghton <jthoughton@...gle.com>,
	Mike Rapoport <rppt@...nel.org>,
	Axel Rasmussen <axelrasmussen@...gle.com>,
	Huacai Chen <chenhuacai@...nel.org>,
	WANG Xuerui <kernel@...0n.name>,
	"loongarch@...ts.linux.dev" <loongarch@...ts.linux.dev>
Subject: Re: [PATCH v4 05/13] mm/arch: Provide pud_pfn() fallback

On Wed, Apr 03, 2024 at 01:17:06PM +0000, Christophe Leroy wrote:

> > That commit makes it sounds like the arch supports huge PUD's through
> > the hugepte mechanism - it says a LTP test failed so something
> > populated a huge PUD at least??
> 
> Not sure, I more see it just like a copy/paste of commit 501b81046701 
> ("mips: mm: add p?d_leaf() definitions").
> 
> The commit message says that the test failed because pmd_leaf() is 
> missing, it says nothing about PUD.

AH fair enough, it is probably a C&P then

Jason

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