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Re: kernel-PAE hangs at boot -- did I do something wrong?

On Fri, 2009-04-17 at 12:31 -0400, Will Woods wrote:
> On Fri, 2009-04-17 at 17:18 +0100, Mary Ellen Foster wrote:
> > 2009/4/17 John Summerfield <debian herakles homelinux org>:
> > > Do you have an objection to running 64-bit Fedora? It obsoletes PAE, and
> > > your applications can see all available RAM, not just the 4 Gbytes 32-bit
> > > addresses give.
> > 
> > I've never tried 64-bit -- does it provide any concrete benefits? I've
> > always been a bit intimidated by all of the posts about multilib
> > craziness, and it didn't seem like it would be worth it ... :)
> Yeah - as I understand it, identical code often runs faster when
> compiled for x86_64, just because i386 is just so starved for
> registers. 

In practice you're not likely to notice any difference in day-to-day
operation of most apps, but it certainly doesn't hurt.

> There are some other benefits too - for example, hardware NX protection
> is always available, so there's no weirdo software workarounds required
> to protect you from buffer overflows and the like.
> The only place it gets tricky is when you start trying to deal with
> closed-source binaries, which are typically i386-only. But the most
> common example - Adobe Flash - is available in a native Linux x86_64
> binary these days.
> And, if it really comes down to it, you can still run 32-bit binaries
> thanks to the wonder and magic[1] of multilib.
> If your hardware's capable I really can't think of a good reason to
> avoid x86_64 anymore.

You can't run hv3! Not without manually installing a messy chain of i586
packages, anyway.

OK, that's not a very good reason =)

There used to be a lot of pain associated with running x86-64, which is
why people tended to steer clear of it, but these days it's really not a
big problem. And it's The Future, so we should probably encourage people
to do so. Don't kid yourself that it'll make everything twice as fast,
though, it doesn't.
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Fedora Talk: adamwill AT fedoraproject DOT org

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