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

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Message-ID: <CAHk-=wh3jD4dwXWWFors9OnYp-YCzYN2bCGs9HDxrtZ=TiFyDQ@mail.gmail.com>
Date:   Wed, 15 Jul 2020 16:04:47 -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 3:57 PM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> But now I've screwed it up twice, and have a splitting headache, so
> rather than stare at this cross-eyed, I'll take a break and hope that
> somebody more competent than me looks at the code.

I lied. I had a couple of pending pulls, so I couldn't go lie down
anyway, so I tried to take another look.

It *might* be as simple as this incremetal thing on top, but then I
think that code will no longer trigger on the stack movement case at
all, since there we don't work with the whole vma.

So if we want that to work, we'd have to fix that up too.

And this might be broken anyway. My track record isn't looking so hot right now.

                  Linus

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