linux-kernel - Re: Yes, people use FOLL

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Message-ID: <CA+55aFwkTrfUX6_Dyh0ucdc=p9RsS+AJk6GpJaice_HNpuRQgA@mail.gmail.com>
Date:   Tue, 30 May 2017 12:42:35 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Keno Fischer <keno@...iacomputing.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Kees Cook <keescook@...omium.org>,
        Andy Lutomirski <luto@...capital.net>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        "Robert O'Callahan" <robert@...llahan.org>
Subject: Re: Yes, people use FOLL_FORCE ;)

On Tue, May 30, 2017 at 11:54 AM, Keno Fischer <keno@...iacomputing.com> wrote:
> Hi Linus,
>
>>      But it sounds like your JIT case actually uses it for writing -
>> but if you can write a small blurb about it, that would be nice.
>
> yes, we use it for writing. Happy to describe the scheme in more detail.

Ok, I've effectively undone that commit (not as a revert, but
semantically we should be back to 4.11 behavior).

I added in some of your comments in the commit message, so hopefully
we'll have a log of why that FOLL_FORCE is there.

              Linus