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Subject: Re: [PATCH 0/2] mm: introduce MAP_FIXED_SAFE
References: <20171129144219.22867-1-mhocko@kernel.org>
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 <5f4fc834-274a-b8f1-bda0-5bcddc5902ed@nvidia.com>
From: Florian Weimer <fweimer@redhat.com>
Message-ID: <b4cc4225-d49c-51b0-dd18-e8038b5136e1@redhat.com>
Date: Wed, 6 Dec 2017 08:35:46 +0100
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To: John Hubbard <jhubbard@nvidia.com>, Matthew Wilcox <willy@infradead.org>, Michael Ellerman <mpe@ellerman.id.au>
Cc: Cyril Hrubis <chrubis@suse.cz>, Michal Hocko <mhocko@kernel.org>, Kees Cook <keescook@chromium.org>, Linux API <linux-api@vger.kernel.org>, Khalid Aziz <khalid.aziz@oracle.com>, Andrew Morton <akpm@linux-foundation.org>, Russell King - ARM Linux <linux@armlinux.org.uk>, Andrea Arcangeli <aarcange@redhat.com>, Linux-MM <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>, linux-arch <linux-arch@vger.kernel.org>, Abdul Haleem <abdhalee@linux.vnet.ibm.com>, Joel Stanley <joel@jms.id.au>

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

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