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Date:   Mon, 7 Nov 2022 10:12:07 +0100
From:   Peter Zijlstra <peterz@infradead.org>
To:     Hugh Dickins <hughd@google.com>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
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        Uros Bizjak <ubizjak@gmail.com>,
        Alistair Popple <apopple@nvidia.com>,
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Subject: Re: mm: delay rmap removal until after TLB flush
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Hi Hugh!

On Sun, Nov 06, 2022 at 01:06:19PM -0800, Hugh Dickins wrote:
> See folio_lock_anon_vma_read(): folio_mapped() plays a key role in
> establishing the continued validity of an anon_vma.  See comments
> above folio_get_anon_vma(), some by me but most by PeterZ IIRC.

Ohhh, you're quite right. Unfortunately I seem to have completely
forgotten about that :-(