linux-kernel - Re: [PATCH] mm/rmap: Add anon

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Message-ID: <6e5b4a19-6496-4841-998e-ee49fca9ea34@lucifer.local>
Date: Fri, 25 Jul 2025 16:58:01 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Jann Horn <jannh@...gle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>, Rik van Riel <riel@...riel.com>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Vlastimil Babka <vbabka@...e.cz>, Harry Yoo <harry.yoo@...cle.com>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/rmap: Add anon_vma lifetime debug check

On Fri, Jul 25, 2025 at 04:07:00PM +0100, Lorenzo Stoakes wrote:
> On Fri, Jul 25, 2025 at 04:48:09PM +0200, Jann Horn wrote:
> > On Fri, Jul 25, 2025 at 3:49 PM Lorenzo Stoakes
> > <lorenzo.stoakes@...cle.com> wrote:
> > > On Fri, Jul 25, 2025 at 02:00:18PM +0200, Jann Horn wrote:
> > > > An anon folio may outlive the VMAs it comes from, so it may also
> > > > outlive its associated anon_vma.
> > >
> > > Yes, I will share some diagrams I did a while ago to outline this. They're
> > > ASCII and make you want to cry! :)
> > >
> > > Hmm, if non-root, I wonder if we
> >
> > (looks like you stopped typing mid-sentence)
>
> Yup,

Lol I did it twice, yeah I'm tired man.

I can't even remember what I was saying... :P