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

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Message-ID: <b4cc4225-d49c-51b0-dd18-e8038b5136e1@redhat.com>
Date:   Wed, 6 Dec 2017 08:35:46 +0100
From:   Florian Weimer <fweimer@...hat.com>
To:     John Hubbard <jhubbard@...dia.com>,
        Matthew Wilcox <willy@...radead.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     Cyril Hrubis <chrubis@...e.cz>, Michal Hocko <mhocko@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Linux API <linux-api@...r.kernel.org>,
        Khalid Aziz <khalid.aziz@...cle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Linux-MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Abdul Haleem <abdhalee@...ux.vnet.ibm.com>,
        Joel Stanley <joel@....id.au>
Subject: Re: [PATCH 0/2] mm: introduce MAP_FIXED_SAFE

On 12/06/2017 08:33 AM, John Hubbard wrote:
> In that case, maybe:
> 
>      MAP_EXACT
> 
> ? ...because that's the characteristic behavior.

Is that true?  mmap still silently rounding up the length to the page 
size, I assume, so even that name is misleading.

Thanks,
Florian