linux-kernel - Re: [PATCHv2] mm: Fix warning in move_normal

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Message-ID: <CAHk-=wjw2yuQjP1rqB=ocr9W3=ak+6h4XygoFTAgM5meiM1Q0A@mail.gmail.com>
Date:   Wed, 15 Jul 2020 16:18:44 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     "Kirill A. Shutemov" <kirill@...temov.name>
Cc:     Joel Fernandes <joel@...lfernandes.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux-MM <linux-mm@...ck.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
        William Kucharski <william.kucharski@...cle.com>
Subject: Re: [PATCHv2] mm: Fix warning in move_normal_pmd()

On Wed, Jul 15, 2020 at 4:04 PM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> It *might* be as simple as this incremental thing on top

No, it needs to be

+       if (*old_addr + *len < old->vm_end)
+               return;

in try_to_align_end(), of course.

Now I'm going for a lie-down, because this cross-eyed thing isn't working.

              Linus