Message-ID: <5037AAB0.6040102@genband.com>
Date: Fri, 24 Aug 2012 10:24:16 -0600
From: Chris Friesen <chris.friesen@genband.com>
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To: Martin Nybo Andersen <tweek@tweek.dk>
CC: wbrana <wbrana@gmail.com>, Bernd Petrovitsch <bernd@petrovitsch.priv.at>,
        Ondrej Zary <linux@rainbow-software.org>,
        linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Drop support for x86-32
References: <CAJ7jCmmbiR7Kzwtc4x++Z+onvSMN5ZyVrORiux6TuZ6=gCBH9Q@mail.gmail.com> <1345823281.28613.34.camel@thorin> <CAJ7jCmmYdQacFtzw+ukGAtrUntnn8S869RcCmbt3cVRY7HYOWw@mail.gmail.com> <201208241814.16862.tweek@tweek.dk>
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On 08/24/2012 10:14 AM, Martin Nybo Andersen wrote:
> (And I'm still not sure why one would run 32-bit applications on a 64-bit
> architecture...)

There are several architectures (powerpc comes to mind) where 32-bit 
userspace on 64-bit kernel is the norm because it offers performance 
advantages due to the smaller pointer size if the process doesn' t need 
the larger address space.  This is the rationale behind the new x32 ABI 
for x86-64 kernels.

You might also want to run legacy apps (which can't be recompiled) on 
new hardware.

Chris


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