Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <20200715135011.42743-1-kirill.shutemov@linux.intel.com>
 <CAHk-=wh4pB-jRngOjcGxpc8=NPds3jWqJwDMUWC3-OEo4dRiKg@mail.gmail.com>
 <20200715205428.GA201569@google.com> <CAHk-=wg-_Oof43pKUHMk4ySdLwpYi7+shFg+aeV18UP2Akiv8g@mail.gmail.com>
 <CAHk-=wg+iVwK7MDXB+BPbhTmP-1eBa-y4vxRNr_G8ETnzv5pZg@mail.gmail.com>
 <20200715222228.jf2pv5u2wyhtc5o5@box> <CAHk-=wgp-ZJ+J250DMaJFBDU2hnhUUqXcUnVnZZ1iFQEK6O-jg@mail.gmail.com>
 <CAHk-=wh3jD4dwXWWFors9OnYp-YCzYN2bCGs9HDxrtZ=TiFyDQ@mail.gmail.com> <CAHk-=wjw2yuQjP1rqB=ocr9W3=ak+6h4XygoFTAgM5meiM1Q0A@mail.gmail.com>
In-Reply-To: <CAHk-=wjw2yuQjP1rqB=ocr9W3=ak+6h4XygoFTAgM5meiM1Q0A@mail.gmail.com>
From:   Naresh Kamboju <naresh.kamboju@linaro.org>
Date:   Thu, 16 Jul 2020 14:02:27 +0530
Message-ID: <CA+G9fYuQ2Jm6TAF_jiQQdCxDhEkCLs+EjT_KDzmYjSfz8p7+Gg@mail.gmail.com>
Subject: Re: [PATCHv2] mm: Fix warning in move_normal_pmd()
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     "Kirill A. Shutemov" <kirill@shutemov.name>,
        Joel Fernandes <joel@joelfernandes.org>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linux-MM <linux-mm@kvack.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        William Kucharski <william.kucharski@oracle.com>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Thu, 16 Jul 2020 at 04:49, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> On Wed, Jul 15, 2020 at 4:04 PM Linus Torvalds
> <torvalds@linux-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.

I have modified the patch with the above change.
Sorry the proposed patch [1] did not solve the reported problem.

Link to warning on i386,
https://lkft.validation.linaro.org/scheduler/job/1574295#L2055

Link to the patch which applied on top of Linus master and tested.
[1] https://pastebin.com/2gTxi3pj

I am happy to test the next version patch.

- Naresh