linux-kernel - Re: [PATCH] mm: Fix MREMAP_DONTUNMAP accounting on VMA merge

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Message-ID: <CAHk-=wjxnvTK-n8fwNJVHB95-9whnPXZ8jJ7xDOT-dxi5biwxQ@mail.gmail.com>
Date:   Sun, 19 Apr 2020 14:09:03 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Brian Geffon <bgeffon@...gle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...capital.net>,
        Sonny Rao <sonnyrao@...gle.com>,
        Jesse Barnes <jsbarnes@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Minchan Kim <minchan@...nel.org>,
        "Kirill A . Shutemov" <kirill@...temov.name>,
        Vlastimil Babka <vbabka@...e.cz>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        Linux API <linux-api@...r.kernel.org>,
        syzbot <syzkaller@...glegroups.com>
Subject: Re: [PATCH] mm: Fix MREMAP_DONTUNMAP accounting on VMA merge

On Sun, Apr 19, 2020 at 10:59 AM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> So I do have a query: would it perhaps not be a good idea to simply
> remove the "vma_merge()" call from copy_vma(), and do at the end of
> move_vma() instead?

I decided to apply the patch regardless, even if somebody does end up
deciding "yeah, let's move the vma_merge() down" later.

             Linus