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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Fri, 19 May 2023 21:01:07 -0700
Message-ID: <CAHk-=wh3tjw+MNxe6zuixtD=D8bXYHWs9h3Y++r5ObTcSvz6+A@mail.gmail.com>
Subject: Re: [PATCH v2 1/4] mm/mremap: Optimize the start addresses in move_page_tables()
To:     Joel Fernandes <joel@joelfernandes.org>
Cc:     linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
        linux-mm@kvack.org, Shuah Khan <shuah@kernel.org>,
        Vlastimil Babka <vbabka@suse.cz>,
        Michal Hocko <mhocko@suse.com>,
        Lorenzo Stoakes <lstoakes@gmail.com>,
        Kirill A Shutemov <kirill@shutemov.name>,
        "Liam R. Howlett" <liam.howlett@oracle.com>,
        "Paul E. McKenney" <paulmck@kernel.org>,
        Suren Baghdasaryan <surenb@google.com>
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On Fri, May 19, 2023 at 8:57=E2=80=AFPM Joel Fernandes <joel@joelfernandes.=
org> wrote:
>
> I also realize that I don't really need to check whether the masked
> source address falls under a VMA neighboring to that of the source's.

I don't think that's true.

You can't start randomly moving other source vma's that may have other cont=
ents.

               Linus