linux-kernel - Re: [PATCH 00/10] convert the majority of file systems to mmap

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Message-ID: <85a22428-24b5-4a85-9d75-bd2f742ab471@redhat.com>
Date: Fri, 1 Aug 2025 16:23:30 +0200
From: David Hildenbrand <david@...hat.com>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 Jason Gunthorpe <jgg@...dia.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 "Liam R . Howlett" <Liam.Howlett@...cle.com>, Jens Axboe <axboe@...nel.dk>,
 Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
 Amir Goldstein <amir73il@...il.com>, Kees Cook <kees@...nel.org>,
 Josef Bacik <josef@...icpanda.com>, Matthew Wilcox <willy@...radead.org>,
 Vlastimil Babka <vbabka@...e.cz>, Jann Horn <jannh@...gle.com>,
 Pedro Falcato <pfalcato@...e.de>, linux-kernel@...r.kernel.org,
 linux-fsdevel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 00/10] convert the majority of file systems to
 mmap_prepare

>>
>> I would like to suggest we add a vma->prepopulate() callback which is
>> where the remap_pfn should go. Once the VMA is finalized and fully
>> operational the vma_ops have the opportunity to prepopulate any PTEs.
> 
> I assume you mean vma->vm_ops->prepopulate ?
> 
> We also have to think about other places where we prepopulate also, for
> instance the perf mmap call now prepopulates (ahem that was me).
> 
> So I do like this as a generalisation.

Sounds interesting to me.

-- 
Cheers,

David / dhildenb