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Date: Mon, 22 Aug 2011 10:24:38 -0700
From: "H. Peter Anvin" <>
To: Vasiliy Kulikov <>
CC: Thomas Gleixner <>, Ingo Molnar <>,,
        Peter Zijlstra <>,
        Andrew Morton <>,,,
Subject: Re: [RFC] x86, mm: start mmap allocation for libs from low addresses

On 08/22/2011 03:17 AM, Vasiliy Kulikov wrote:
> Hi Ingo, Peter, Thomas,
> On Tue, Aug 16, 2011 at 13:05 +0400, Vasiliy Kulikov wrote:
>> As the changes are not intrusive, we'd want to see this feature in the
>> upstream kernel.  If you know why the patch cannot be a part of the
>> upstream kernel - please tell me, I'll try to address the issues.
> Any comments on the RFC?  Otherwise, may I resend it as a PATCH for
> inclusion?
> Thanks!


I also have to admit to being somewhat skeptical to the concept on a
littleendian architecture like x86.


The code is horrific; it is full of open-coded magic numbers; it also
puts a function called arch_get_unmapped_exec_area() in a generic file,
which could best be described as "WTF" -- the arch_ prefix we use
specifically to denote a per-architecture hook function.

As such, your claim that the changes are not intrusive is plain false.


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