linux-kernel - Re: [PATCH v3 4/4] mm: perform VMA allocation, freeing, duplication in mm

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Message-ID: <5edc96cf-4f48-447f-b5a3-7e38679fa3f0@lucifer.local>
Date: Wed, 30 Apr 2025 10:20:10 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
        "Liam R . Howlett" <Liam.Howlett@...cle.com>,
        Jann Horn <jannh@...gle.com>, Pedro Falcato <pfalcato@...e.de>,
        David Hildenbrand <david@...hat.com>, Kees Cook <kees@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
        Suren Baghdasaryan <surenb@...gle.com>, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/4] mm: perform VMA allocation, freeing, duplication
 in mm

On Tue, Apr 29, 2025 at 09:22:59AM +0200, Vlastimil Babka wrote:
> On 4/28/25 17:28, Lorenzo Stoakes wrote:
> > Right now these are performed in kernel/fork.c which is odd and a violation
> > of separation of concerns, as well as preventing us from integrating this
> > and related logic into userland VMA testing going forward, and perhaps more
> > importantly - enabling us to, in a subsequent commit, make VMA
> > allocation/freeing a purely internal mm operation.
>
> I wonder if the last part is from an earlier version and now obsolete
> because there's not subsequent commit in this series and the placement of
> alloc/freeing in vma_init.c seems making those purely internal mm operations
> already? Or do you mean some further plans?
>

Sorry, missed this!

Andrew - could we delete the last part of this sentence so it reads:

Right now these are performed in kernel/fork.c which is odd and a violation
of separation of concerns, as well as preventing us from integrating this
and related logic into userland VMA testing going forward.

Thanks!