linux-kernel - Re: [PATCH RFC 06/14] mm/huge_memory: support huge zero folio in vmf_insert_folio

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Message-ID: <998ab0ce-6f11-4c0b-bc32-38fe2abd74b7@redhat.com>
Date: Wed, 25 Jun 2025 10:59:21 +0200
From: David Hildenbrand <david@...hat.com>
To: Oscar Salvador <osalvador@...e.de>
Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
 linux-mm@...ck.org, nvdimm@...ts.linux.dev,
 Andrew Morton <akpm@...ux-foundation.org>, Juergen Gross <jgross@...e.com>,
 Stefano Stabellini <sstabellini@...nel.org>,
 Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
 Dan Williams <dan.j.williams@...el.com>, Alistair Popple
 <apopple@...dia.com>, Matthew Wilcox <willy@...radead.org>,
 Jan Kara <jack@...e.cz>, Alexander Viro <viro@...iv.linux.org.uk>,
 Christian Brauner <brauner@...nel.org>, Zi Yan <ziy@...dia.com>,
 Baolin Wang <baolin.wang@...ux.alibaba.com>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 "Liam R. Howlett" <Liam.Howlett@...cle.com>, Nico Pache <npache@...hat.com>,
 Ryan Roberts <ryan.roberts@....com>, Dev Jain <dev.jain@....com>,
 Barry Song <baohua@...nel.org>, Vlastimil Babka <vbabka@...e.cz>,
 Mike Rapoport <rppt@...nel.org>, Suren Baghdasaryan <surenb@...gle.com>,
 Michal Hocko <mhocko@...e.com>, Jann Horn <jannh@...gle.com>,
 Pedro Falcato <pfalcato@...e.de>
Subject: Re: [PATCH RFC 06/14] mm/huge_memory: support huge zero folio in
 vmf_insert_folio_pmd()

On 25.06.25 10:20, Oscar Salvador wrote:
> On Tue, Jun 17, 2025 at 05:43:37PM +0200, David Hildenbrand wrote:
>> Just like we do for vmf_insert_page_mkwrite() -> ... ->
>> insert_page_into_pte_locked(), support the huge zero folio.
> 
> It might just be me because I don't have the full context cached, but
> I might have appreciated more info here :-).

I can add something similar to what we have in patch #8, stating that we 
will change it to be special as well soon.

Thanks!

-- 
Cheers,

David / dhildenb