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From: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Date: Wed, 30 May 2012 16:16:26 -0400
Message-ID: <CAHGf_=r_ZMKNx+VriO6822otF=U_huj7uxoc5GM-2DEVryKxNQ@mail.gmail.com>
Subject: Re: [PATCH 0/6] mempolicy memory corruption fixlet
To: Andi Kleen <andi@firstfloor.org>
Cc: Christoph Lameter <cl@linux.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Andrew Morton <akpm@google.com>, Dave Jones <davej@redhat.com>,
        Mel Gorman <mgorman@suse.de>, stable@vger.kernel.org, hughd@google.com,
        sivanich@sgi.com
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On Wed, May 30, 2012 at 4:10 PM, Andi Kleen <andi@firstfloor.org> wrote:
>> Yes, that's right direction, I think. Currently, shmem_set_policy() can't handle
>> nonlinear mapping.
>
> I've been mulling for some time to just remove non linear mappings.
> AFAIK they were only useful on 32bit and are obsolete and could be
> emulated with VMAs instead.

I agree. It is only userful on 32bit and current enterprise users don't use
32bit anymore. So, I don't think emulated by vmas cause user visible issue.
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