shared memory problem on armel

[Steve Langasek]

On Thu, Feb 07, 2013 at 09:33:54PM +0100, martinwguy wrote:
> On 7 February 2013 19:58, Mike Thompson <mpthompson at gmail.com> wrote:
> > On Thu, Feb 7, 2013 at 10:10 AM, Ben Hutchings <ben at decadent.org.uk> wrote:
> >> On Thu, Feb 07, 2013 at 06:42:20PM +0100, martinwguy wrote:
> >> > For example, the armv6 armhf port for the Raspberry Pi in armhf/V6.

> >> The wilful incompatibility of Debian derivatives should not restrict
> >> what Debian does.

> > Ideally, I would love to see Raspbian folded back into the Debian Project,
> > but I realize this won't happen for a variety of reasons.

> There is a way: for Debian armhf to re-target on v6 in a future release.
> That would break none of the existing installations and make Debian
> more Universal as per its manifesto.

Debian already has a perfectly good port capable of running on the Pi - the
armel port.  So there's no difference in universality.  But the Pi
enthusiasts didn't think this was good enough, and wanted one optimized for
their particular chipset.

> With hindsight it would have been better for Debian armhf to have
> targetted on the lowest arch version that almost always had a VFP unit,
> but that forward path is easy.

> It seems a net win compared to a few % extra speed in FPU-intensive
> apps on v7+ CPUs.

The v7+ CPUs far outnumber the v6 CPUs, of which there's only one platform
that anyone is interested in (the RPi).  Amortizing that few % speed
improvement across the whole range of devices armhf runs on adds up to a big
deal.

-- 
Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                    http://www.debian.org/
slangasek at ubuntu.com                                     vorlon at debian.org
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