linux-kernel - Re: [RFC 2/3] mm: add STATIC_PMD_ZERO

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Message-ID: <04a27029-df1e-43a7-8642-15f351121438@redhat.com>
Date: Mon, 2 Jun 2025 22:28:53 +0200
From: David Hildenbrand <david@...hat.com>
To: Pankaj Raghav <kernel@...kajraghav.com>, Christoph Hellwig <hch@....de>,
 Pankaj Raghav <p.raghav@...sung.com>
Cc: Suren Baghdasaryan <surenb@...gle.com>,
 Ryan Roberts <ryan.roberts@....com>, Vlastimil Babka <vbabka@...e.cz>,
 Baolin Wang <baolin.wang@...ux.alibaba.com>, Borislav Petkov <bp@...en8.de>,
 Ingo Molnar <mingo@...hat.com>, "H . Peter Anvin" <hpa@...or.com>,
 Zi Yan <ziy@...dia.com>, Mike Rapoport <rppt@...nel.org>,
 Dave Hansen <dave.hansen@...ux.intel.com>, Michal Hocko <mhocko@...e.com>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Thomas Gleixner <tglx@...utronix.de>, Nico Pache <npache@...hat.com>,
 Dev Jain <dev.jain@....com>, "Liam R . Howlett" <Liam.Howlett@...cle.com>,
 Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org,
 linux-mm@...ck.org, linux-block@...r.kernel.org, willy@...radead.org,
 x86@...nel.org, linux-fsdevel@...r.kernel.org,
 "Darrick J . Wong" <djwong@...nel.org>, mcgrof@...nel.org,
 gost.dev@...sung.com
Subject: Re: [RFC 2/3] mm: add STATIC_PMD_ZERO_PAGE config option

On 02.06.25 16:49, Pankaj Raghav wrote:
> On 6/2/25 07:03, Christoph Hellwig wrote:
>> Should this say FOLIO instead of PAGE in the config option to match
>> the symbol protected by it?
>>
> I am still discussing how the final implementation should be with David. But I will
> change the _PAGE to _FOLIO as that is what we would like to expose at the end.

It's a huge page, represented internally as a folio. No strong opinion, 
as ...

MMF_HUGE_ZERO_PAGE vs. mm_get_huge_zero_folio vs. get_huge_zero_page vs 
... :)

-- 
Cheers,

David / dhildenb