linux-kernel - Re: [PATCH v2 0/2] mm: introduce MAP_FIXED

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Message-ID: <20171213122533.GA2384@bombadil.infradead.org>
Date:   Wed, 13 Dec 2017 04:25:33 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     linux-api@...r.kernel.org, Khalid Aziz <khalid.aziz@...cle.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Andrea Arcangeli <aarcange@...hat.com>, linux-mm@...ck.org,
        LKML <linux-kernel@...r.kernel.org>, linux-arch@...r.kernel.org,
        Florian Weimer <fweimer@...hat.com>,
        John Hubbard <jhubbard@...dia.com>,
        Abdul Haleem <abdhalee@...ux.vnet.ibm.com>,
        Joel Stanley <joel@....id.au>,
        Kees Cook <keescook@...omium.org>,
        Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH v2 0/2] mm: introduce MAP_FIXED_SAFE

On Wed, Dec 13, 2017 at 10:25:48AM +0100, Michal Hocko wrote:
> I am afraid we can bikeshed this to death and there will still be
> somebody finding yet another better name. Therefore I've decided to
> stick with my original MAP_FIXED_SAFE. Why? Well, because it keeps the
> MAP_FIXED prefix which should be recognized by developers and _SAFE
> suffix should also be clear that all dangerous side effects of the old
> MAP_FIXED are gone.

I liked basically every other name suggested more than MAP_FIXED_SAFE.
"Safe against what?" was an important question.

MAP_AT_ADDR was the best suggestion I saw that wasn't one of mine.  Of
my suggestions, I liked MAP_STATIC the best.